September 1994
TU Deift
Deift University of TechnologyFaculty of Mechanical Engineering and Maritime Technology
Ship Hydromechanics Laboratory
Report No. 992 September 1994
ANNUAL REPORT 1993
Deift University of Technology Dep. of Mechanical Engineering and Marine Technology
Mekelweg 2, 2628 CD Deift The Netherlands
INTRODUCTION
This report contains a review of the organization,
staff andfacilities of the Ship Hydromechanics Department of the Technical University Deift and of the teaching and research program for the year 1993. Short excerpt are given of the research program giving
insight in the methodology followed for the particular problem
under study. The selection of research topics of the department is band on the one hand on the need to contribute to the 'filling in' of knowledge gaps in the field of applied hydromechanics and on the other hand on the needs of industry. This report also contains a list
of projects carried out directly for the Maritime Industry. Such
project consist of numerical studies based in specialised software developed by the department or of experiments carried out in our
towing tank or cavitation tunnel. Due to staifrestrictions only a
limited number of such projects are carried out. They do however4 serve to maintains the 'real world' awareness of the department and are such indispensable
CONTENTS
ORGANIZATION OF THE SHIP HYDROMECHANICS LABORATORY PROMOTIONS EDUCATIONAL PROGRAM STUDENT THESIS
MEMBERSHIPS OF INTERNATIONAL
ORGANIZATIONSCONTRIBUTIONS TO SYMPOSIA, CONGRESSES ETC.
PUBUC ASSISTANCE
RESEARCH
RESEARCH FACIUTIES OF TIE SHIP. HYDRO
MECHANICS LABORATORY
REPORTS AND PUBUCATIONS OF THE SHIP
HYDROMECHANICS LABORATORY
ORGANIZATION OF TILE SHIP; DROMECHANICS LABORATORY Mekelweg 2, 2628 CD Deift, The Netherlands 4 Phone: +31 15 786882 Fax: +31 15 781836 Phone: 015-78.... Board:
Prof.dr.ir. J.A. Pinkster (chairman)
.3598
Ir. J.A. Keuning (secretary) ..1897
Ir. J.M.J Journée (member) ..3881
Ing. A. Goeman (member). ..1893
Permanent Staff:
Prof.dr.ir.. J.A.. Pinkster ..3598
Prof.dr.ir. G. Kuiper ..6860
Ir. J.M.J. Journée ..388!1
Ir. J.A. Keuning ..1897
Ir. J. Ooms ..3876
Ir. P.F. van Terw.isga 1570
Ing. A.A.M. van Gulik ..4684
Ing. A. Versluis ...3871
Instruction- aid Research Assistants
Ing. C. Born ..6870
Ing. A. Goeman ..1893
P.W. de Heer .6873
R. Onnink ..6872
Secretary: Mrs. P.J. Trijzelaar-Verduin
Librarian:
P.W. de HeerLaboratory Manager:
Ing. A. Goeinan Drawing Office: Ing. C.P.Poot Electronic Sectioú: Ir. J. OomsR. van den Oever Modeishop:
C.A.C.M. van der Bergh Mechanic Section:
B. Dammers
W van der Hek Ph.D.. Students:
Ir.. L.J.M.. Adegeest ,. . ..5562
Arun Kr. Dey, BScEngg. MSc. CEng. ..1570
Ir. H.J. de Koning Gans ..1852
5 .6882 .6873 1893 ..3745, 6875 .3876 ..1590 6877 .6877
During this year the following persons left the Ship
Hydromechanics Laboratory:
September 1, 1993 A.J. van Strien
** *
2. PROMOTIONS
At the Ship Hydromechanics Laboratory the following persons were working on their doctor's thesis:
Promotion June 10,
1993 at the Deift University: :øf
Technology, Ir. J.J. Blok on the theme:
'Resistance of Ships in a Seaway' Supervisor: Prof.ir. J. Gerritsma
Ir. J.A. Keuning on the theme:
'Dynamic Behaviour of Fast Ships'
Supervisor: Prof.ir. J. Gerritsma
Ir. J.H. de Koning Gans on the, theme:
'Instationary Cavitation on a 3-Dimensional Foil' Supervisor: Prof.dr..ir. G. Kuiper
Ir. J.L.M. Adegeest on the theme
'Short and Long Term Wave Loads' Supervisor: Prof.dr.ir. J. A. Pinkster
Arun Kr. Dey, BScEngg. MSc. CEng. on the theme:
'Hydrodynamic Aspects of Moored Senii-Submersibles lin Extreme Seas'
Supervisor: Prof.dr.ir. JA. Pinkster
3. EDUCATIONAL PROGRAM (in. Dutch)
Prof.dr.ir. J.A. Pinkster
'Ship Motions and Steering I' Part 1: Waves and Ship Motions Part 2: Steering and manoeuvring
Part 3: Waves
'Ship Motions and Steering IL'
Part 1: Steering
Part 2: Ship Motions
Prof.dr.ir. G. Kuiper
MTS12, 'Resistance and Propulsion' (in English)
fr. J.M.J. Journée
X2MT1, 'Offshore Hydromechanics'
Xl,
'Offshore Technology'fr. J.A. Keuning
WbmiO7, 'Technical Systems'
STUDENT THESIS
03-12-1993
Berg, K.J.A. van den
'Het zeegangsgedrag van het Surface Effect Ship".
23-1.2-1993 Veer,,
van't
'Catamaran Seakeeping Prediction'.
MEMBERSHIPS OF INTERNATIONAL
ORGANIZA-TIONS
Member Advisory bo4rd Institute for Marine Dynamics IMD), St John's, New Foundland
Member Advisory board Offshore MARIN. KIV1/MarTec, Chairman.
Ocean Engineering: International editor.
International Shipbuilding Progress (ISP): Senior editor. International Towing Tank Conference (flTC):
Ocean Engineering Committee (chairman).
Membership of CMO advisory panels and committees:
General Hydrodynamics. SNAME
6. CONTRIBUTIONS TO SYMPOSIA. CONGRESSES ETC.
Offshore Technology
Conferénce OTC, May
1993,Houston, Texas,. USA
'The Reduction of Low Frequency Motions of Moored
FPSO's'
by Prof.dr.ir. J.A. Pinkster.
Offshore Technology
Conference OTC, May
1993,Houston, Texas, USA.
'Hydrodynamic Aspects of Moored Semi-Submersibles
and TLP's'
by Prof.dr.ir. J.A. Pinkster.
.3. Proceeding Royal InstitÍtiÒn of Naval Architets RINA,
1993
'Dynamic Behaviour of Fast Monòhulls'.
by Ir. J.A. Keuning and Ir.. F.H.H.A. Quadvlieg.
4. The Eight International Workshop on Water Waves and
Floating Bodies, National Research Council of Canada,
23-26 May 1993, St.John's, Newfoundland, Canada.
'Some Effects of Application of a Nonlinear Simulation Model on Ship Responses'
FAST '93,, Second Intemátional' Conftence on Fast Sea
Transportation, 13-16 December 1993, Yokohama, Japan.
'Experimental and Numerical Investigation into Wave
Exciting Surge Forces in Large. Following, Waves'
by Ir. J.A. Keuning, fr. P.F. van Terwisga and fr.
L.J.M. Adegeest.
6. NVTS/Scheepsbouwkundig Gezelschap "William Froude" Lustmm Symposium.
'Onderzoek in de, Scheepshydromechanica..
by Prof.dr.ir. J.A. Pinkster.
7 Najaarscolloqium J.M. Burgerscentrum, "Numerieke Methoden in de Scheepshydromechanicà', 5 November
1993
'Ship Motions and Wave. Loads in Extreme Séa
Conditions' by Ir. L.J.M. Adegeest.
'A Panel Method for Free-Surface Flows applied to
Cavitation' by fr H.J. de Koning Gans
7. PUBLIC ASSISTANCE
During this period considered the Laboratory, besides its
normal research, provided (payed) services for. Industry and
Government. This included: model tests, full scale trials studies etc.
In 1993 the next projects have been carried out:.
'Motions and Thruster forces of DP-pipe laying vessel SOUTAIRE in long-crested and directionally spread seas', Atlantic Point Inc., 5 Route de la Coula, 161:8 Chatel
-St. Denis, Switserland.
'Meetrapport Catamaran Why Not',
Matune Ltd, Amersfoort, the Netherlands.
'Calculations of Struck-Ship Motionsby Using theCummins Equations with Strip Theory Potential Coefficients', TNO-CMC, Leeghwaterstraat 5, Delft, the Netherlands
'Meetrapport en Voortstuwingsberekening van eenplanerend
motorjacht',
W. de Vries Lentsch, Bureau voor de Scheepsbouw, Amsterdam, the Netherlands.
- 'Motions of Struck-Ship after a Coffission',
TNO-CMC, Leeghwaterstraat 5, Delft, the Netherlands. 'Motions and Mean Drift Forces on Solitaire',
Atlantic Point Inc., 5 Route de la Coula, 1618 Chatel -St. Denis, Switserland.
'Behaviour of Ro-Ro Vessels after a Sudden Ingress of Water',
TNO-CMC, Delft and Directorate-General of Shipping and Maritime affairs, Rotterdam, the Netherlands.
'Wave Induced Loads in a Shiphull';
Royal Dutch Navy, the Hague, the Netherlañds. 'Human Perfonnance',
TNO Institute for Human Factors 1ZF, Soesterberg, the
Netherlands.
8. RESEARCH
The main theme .of the research activities of the Deift
Shiphydromechanics Laboratory is the optimization of theHydro-mechanic Behaviour of Ship and Maritime Structures., The main research areas and topics in this field were;
rHydromechanic Manoeuvring Coefficients of a Wing Model.
Ing. W. Beukelman./ Ir. J.M,J. Journée.
For conventional ships the directional or course stability may sufficiently be determined from data obtained, by full scale
ex-periments or forced oscillation tests with a ship model. In this way it is possible to measure the manoeuvring coefficients, which for
conventional ships at deep water also may be obtained from
expressions based partly on experience and theory. Predictiòn of atrack or a manoeuvre at deep water is within sorne limitations
possible.
Determination of hydrodynamic manoeuvring coefficients by
poten-tial theory mostly fails with respect to the damping coefficient
becäuse the viscous influence in general and the flow separation at the aft part of the ship is insufficiently taken into account.
In the physical model for predicting manoeuvring coefficients the
ship is' considered to be a wing profile with a very low, aspect ratio.
For fast modern ships, 'such as Ro-Ri ferry vessels,, it is even more
difficult to obtain 'm'ànoeuvring characteristics, especially 'for
particular circumstances such as shallow water, trimmed conditions and in waves.
As a first step to address this problem it was thought to be use-ful
to design a series of tests with a wing profile model in deep and shallow water to. obtain the required expçriinental data and to
compare them with provisional computed potential values The
cal-culated lift force has been determined from the variation of the
added mass impulse.
The tests were carried out in Towing Tank No I with a
piercing wing profile model at three speeds in two opposite
directions in both deep and shallow water. The longitudinal and
transverse forces on the wing were measured as a function of the
angle of attack or drift angle in manoeuvring notation. These
measurements were carried out for three draughts and four water depths including deep water.Additionally, some tests were performed with faired tips of the
huge in stead of the usual square tips to show the viscous
in-Iluence for the latter condition. From the measurements the lift
force, the lift moment and the drag have been determined and pre-sented on basis of the angle of attack.
In addition to these static measurements, forced horizontal motion
tests with a PMM have also been performed to determine the
manoeuvring coefficients. These results will be reported separa-tely in the future.
iI
i
I.
r, 311 ('t 14 Jf
Yacht Research.
Ir. J.A. Keuning.
In order to be able to predict the resistance of a yacht w.ith an
arbitrary shape more accurately, a new method has been propOsed in which the hull, keel and rudder are treated separately insteadas
an arbitrary hull with a standard keel and rudder geometry as done up till now.
Here to, 21 models of the Deift Systematic Yacht Huilform Series have been tested without keel and rudder. The bare hull resistance is' now approximated by poljnomials based on these results. The keel and' the rudder resistance is calculated separately and added on
later.
To investigate the interaction between hull and keel (wing-body interation) in both resistance and side force, an experiment has
been carried out with an America's Cup Hull with hull 'and keel, instrumented separately. This model has been completely tested upright and under leeway and heel in 4 configurations:
- hull with keel and rudder
- hull with keel
- keel with rudder
- bare hùll.
The experiments will be analysed' in 1994. The measured results Will be 'compared with' CFD approximations.
itDI lili U/Ill
riti
ar'i r
Design of Profiles with a Prescribed Cavitation Behaviour.
Ir. H.J. de Koning Gans.
The research is aimed at profile design with respect to cavitation control. in presents technology it is possible topredict the shape of cavities on an arbitrai)' twodimensional profile in stationary flows.
To improve the modelling of cavitation, a new method is set up
with extension to.
three-dimensional flows and instationary
cavitation. A new computer program had to be deve-loped for the
new extensions. To compute the (stationary). flow around an
arbitrary profile a higher order 3-D-panel-method program. has
been developed. The main algorithm, used in this program is based
on a special case of the Green's theorem, called "de Morino
formulation'.This. computer program
(flow program) can determine the potential on the body and the velocities at the surface of the body or in the flow field.The computer program is
extended for time simulation of
dynamical sheet. cavjtation'. The concept of this extension is, 'based
as follows. The potential will be calculated at the body. The
potential and velocity at the cavity sheet will be calculated with anormal Taylor expansion. This expansion makes use of' the
divergence and rotation theorems of potential flows.. Now the
pressure at the sheet will be determined at every
time step. Knowing this pressure the normal. velocity of the sheet can bedetermined and integrating this velocity the new cavity thickness and geometry will be computed.
The numerical results of this computer program have been
compared with two-dimensional flow around profiles and with three-dimensional flow around a sphere and a three dimensional wing. The results of the two dimensional flow calculation are compared with the results of conformal mapping. The results of
three-dimensional flow calculation are compared with the results of other panel programs.
Also sheet cavitation calculations are carried out. From this
calculations it appears that the pressure at the cavity sheet is
calculated very accurately. Also the pressure dip at the closure ofthe cavity is removed. The geometry of the cavity is less ra1itic,
because the cavity will grow almost in nonna! direction of the
profile.
Frôni the models of the panel method as sell as the modèl of
cavity simulation are wiitten in a dissertation. This dissertation
deals with the theory of higher order panel methods, the theory of
simulation of a sheet cavity in a potential floW, the stability
analysis of the growth of. the cavity and the results of the
computations, which are mentioned above.
Safety of RoRo' Ships.
Ir. J.M.J. Journée.
Together with ThO-CMC, and DGSM, the development of a
reliable tool.for judging the safety. of RoRo ships.has been started in 1990. Based on theory and, results of model, experiments,acorn-prehensive computer program,: named .DYNING,,
hás' been
developed. This program simulates the motion, behaviour, of
vessel after 'a sudden ingressof water, for instance alter açoffision.
It is based on the Cummins equations to describe the motions of
the vessel! in the time domain and a theoretical description of the fluid-flow of the ingressed water in the ship.
A feasibility study to impròve this computer program, has been
carried out For validation purposes and to improve the program,
new series of experiments with different types of characteristic feriy models are requited. For this, it 'is tried' to obtaili. fmanial
support of the industry. .
For one ferry-model, the "Ferry-62", a sufficient financial support has been obtained The manufacture of the model has been started and the model experiments will be carried out in spring 1994 For a second model, the "Ferry-72", the desired financial support
has been: obtained partly.
Ship Design.
.
Ing. A. Vershuis.Conversion programs have been made for conversión the body
p1ans of the parent sbipforms, as used in the transformation
program and in, the "HYDRO-Deift" program, to the huilform files for other computer programs, such as the ship motions stnp theoryprogram "SEAWAY.", the ship motions diffractión program
"DELFRAC," and the hydrostatic program package "PIAS":. In relation with the regulations of the 'Scheepvaartinspektie" and the "International Maritime Organisation', the hydrostatic
calculations and in particular the stability calculation
in the
"HYDRO-DelIt". package have been adjusted.
The program package "HYDRO-Delft' has. been. extended with a
digitizer program to measure offsets of .bo.y plans As a result of
this, the time. needed to compose the huilform..input for the
hydrostatic calculations has been reduçed strongly.User-friendly interfaces, for the several ship resistance and propeller
calculation programs are made. The Velocity. Prediction Program for sailing boats, "VPP-Delft",. computes the polar diagrams of the forward ship speed with variable wind directions and wind speeds The extension of the program. for sailing in. irregular seas has been completed and tested for a wide range of ships. The irregular seas have been defined by the ideal Bretschneider wave spectra witha
significant wave height H113 and a mean wave period T1.
Wave Induced Loads in a ShiphulL
Ir. L.J.M. Adegeest.
In 1993, the research of the nonlinear hull girder loads in a ship
cross section in extreme wave conditions has been continued with new model tests. Hydrodymanic reaction forces and wave excita-tion forces have been measured on an eight secexcita-tion divided Wigley
model with bow flare. Besides that the vertical motions, shear
forces and bending moments have been measured using. a Wigley
model with bow flare in extreme regular and irregular head waves.
The model was fixed in longitudinal direction. Responses have
been measured up to the third harmonic.
A method has been developed in order to predict the nonlinear responses, including secOnd and third order effects, in irregular
waves based on knowledge of the response in. regular waves. Use has been made of 'a third order Volterra series modeling 'in which the nonlinear'frequency response fUnctions have' been replaced by one-dimensional linear frequency' response function, followed by a zero-memory quadratic or cubic 'operation. Longterm simulations have been perfonned using Fast Fourier Transfòrm routines. The results háve 'been compared with towing tank results obtained
in irregúlar waves. It appeared that the third order modeling
'improved the prediction of the statistical properties significantly, especially in case òf the bending moments and: shear forces. Besides the towing tank tests longterm measurements have been perfonned outdoor on theHaringvliet. An eightmeter tanker modelhas. been used. 'These tests have been conducted in' cooperation with
the Royal' DUtch Navy. The measùred quantities were the wave
surface elevation, the motions, bending momeiìts and shear forces
in 'the midship sectiOn' and the mooring forces. Data' obtained' frOm
hiS experimeñt willbe used fOr long term 'statisticS "
Hydrodynamic Aspects of Moored Semi-submersibles
inExtreme Seas. A.Kr. Dey, MSc.
Experiments with a fixed vertical, surface piercing and tnincated cylinder (large diameter) model in regular waves with or without
forward speed have been conducted in the Seakeeping Basin of
MARIN at Wageningen. Limited data still show that viscous mean
drift forces exist but with less magnitude compared to potential
mean drift forces. Data analysis and results have been elaborated in the internal reports.
Experiments with a fixed and completely submerged rectangular
pontoon model having two dummy vertical surface piercing
columns have been conducted in Towing Tank No i of the
Shiphydromechanics Laboratory. Tests have been done for similar
sea conditions like head seas and beam seas for a wide range of
hydrodynamic parameters in regular waves with or without forward
speed. Data analysis and results have been elaborated in the
internal reports.During the cOurse of the 'ongoing research, a computer program has been developed to calculate the static current and wind loads on offshore structures like semi-submersibles and tensions leg plat-forms of various under water geometry. The theory and the appli-cation of the program have been described in details in an internal
report.
Numerical works on the prediction of sécond order viscous mean drift forces on a complete semi-submersible in irregular waves are
in progress.
Ship MotiOns.
Ir. J.M.J. Journée.
A research program has been carried out to study the influence of
the water depth on the two-dimensional hydrodynamic potential
coefficients and the wave forces and moments. In particular,
áttention has been paid to cross sections with very small and very large breadth to draught ratios. For this, a calculation method forLewisform cross sections at restricted water depths has been
implemented in the frequency domain strip theory program
SWAY and' the program has been tested with experimental data. Then, the influence of the diffraction of waves on the wave loads in beam waves has been studied. With the results of this study, it will be tried to improve the description of the wave loads as usedin the strip theory. The first results of this research are very
encouraging.
The time domain program SEATIME is partly based On the
frequency domain program SEAWAY, which has been modified completely during 1992/1993. The program SEATIME has beenadapted to these last developments and extended with new and
improved algorithms. The implementation of viscous nonlinear roll
damping has been improved. After this the program was tested.
Derivatives of :this program were used to study the dynamic
behaviour of a ship during loading and unloading with ship-borne cranes and to study the manoeuvring behaviour of a trailing hoppersuction dredger.
In cooperation with TNO/CMC the behaviour of a ship after a col-lision has been studied. Based on the existing programs SEAWAY -D and SEA , anew program has been made, for this purpose. To verify the new program., model experiments have been carried
out with a. model of an oilpollution cleaning 'essel, loaded by
known external impuls forces. Then, the :!program was used for TNO/CMCto simulate the motions of an inland waterway vessel after a colhsion with known collision loads, measured dunng full scale, collision tests with Xwo inland' waterway vessels; The theo-relical model, appeared. to be veiy usefull. The ship motions pro-gram SEAQUICK for ship designers, dehvers specific information about displacements, velocities,. acceleratiôns, added. resistance, propeller racing, shipping green water and slamming; ,As a result of modifications in SEAWAY,, this program has been updated...
Dynamics of Fast Ships.
Ir. J.A. Keumng.
The results of an experiment with a systematic series of planing
hull forms with 30 degrees deadrise have been. published., In com-bination with the previously published results for identical series,
having 12.5 and 25 degrees deadrise respectively, a calculation
procedure has been developped using polynomial expressions to predict the resistance sinkage and trim of an arbitrary planing hUll. This has been published in ISP (Volume 40, September 1993): The computation for the sinkage and trim has been incorporated in
thecode FAS'] SHIP developped to predict motions of planing ships
in head waves. The results for sinkage and trim are used to asses
the distribution of the hydrodynamic lift over the length of.the
planing bottom. A sensitivity analysis has been carried out on the
effect of this on the predicted motions. These results have been presented on the International Conference on High Speed
Pas-senger Craft of RINA, London, June 1993. This doctor's thesis will be fmalised in 1994.
Human Performance.
Ir. JA. Keùning.
The MotiOn Simülator at IZF-TNO in Soestèrberg has 'been
finalized and'is fully operatiOnal nowExperiments with a group of about 20 persons have been carried to determine the cOmbined effect of roll and heave on the motion
sickness incidence. The results of these experiments have been
reported 'tO the contractors '(Royal Dutch 'Navy).
The additional tests on board of real ships in real conditions are
continued with a' 3 week trip aboard the HMS' Tydeman. The MSI scoring 'list has been optinfised and standarised in conjunction with the' Mierican, Cànadian 'and British Navies. The results of these measutements will be elaborated' during 1994.
pilot study 'has been staited 'to investigate the possible use òf 'the tiulator for studies on Motions Induced Interruptions.
Therelation between acceleration
and frequency and its influence on seasickness, for single frequencies. The criterion here is vomiting within two'hours after the start of,the motion.
Ship motions:
3-Dimensional Diffraction Program DELF.RAC.
Prof.dr.ir. J.A. Pinkster.
The threedimensional diffraction theory is used to compute' the wave 'k)ads and motions at zero forward' speecL The method is
based on the. linear potential'theory, which assumes waves.to be small. Besides wave loads and, motions', the. resulting disturbance created by the presence ola floating body on the surmunding,'wave
field, can be computed.
In 1993 the following activities were carried out .
- A method to compute mean second order wave forces, based 'on a farfield method by Faltinsen and Michelsen,. .was incorporated'.
Results of computations were compared with resuitsof thé similar nearfield method.
Experiments were carried out to determine motions and mean second order forces on a moored tanker. Experiïnental resultswere
compared with computations.
- The code was installed on the CONVEX mini-supercomputer, in
order to allow computations to be carried out for more complex
geometries.
- Wave field calculations were carried out on béhaif of the Faculty
of Civil ' Engineering for the purpose of gaining insight in the
efficiency of floating breakwaters.
Ship Motions and Added Resistance in' Large Following Waves.
Ir. P.F. van Terwisga.
Primary goal of the investigation is an improvçd insight in the behaviour of ships in following waves with spécial attention to
suthng. In addition to the tests, on 'two models of the Dem
Systematic Yacht Hüliform Seriés (SYSSER 27 and SYSSER 38),identical quasi-static wave force tests have been measured for a
third model (SYSSER 39). The good agreement of model test
results and calculated results using a zero-order model and a higher order Froude-Krylov force model confirmed previous results of the
SYSSER 27.
Results of the SYSSER 38 model showed. less correlation With calculations, probably caused by the extreme breadth to draught
ratio of this model. The wetted surface of this model is very
sensitive to small1 changes in trim and sinkage which could very well be the cause of discrepancies between the higher order FroudeKrylov method :(S i O OLOcode) and experiinents
A time d main iriodelhas been develóped with which the behaviour of ships in following waves can be simulated based on
experimn-al or cexperimn-alculated quasi-steady wave force data. The model cañ be used to obtain the critical speed for unconditional surfing
ite-ratively, i e the model will surf irrespective of the initial position for the simulation.
In 1994 the SIMMOLO code will be modified to include the non-linear sUrging. This 'wil make simulations in irregular following
wtves possible.
-LI)
'AaRNr NODEL (NO. 1. - 22)
'-J
PARENT W)DEL (NO. 23 - 39)
Low-Cost, Sensors fOr the Measurement of Ship Motions and
Waves.
Ir. J. Ooms.
Research has been carried .out on the characterization of 1owcost sensors to determine their suitability for measuring ship motions and waves. Also, attention has been paid to the design of
associ-ated electronics that optimize the pérformance of the sensors or
sensor combinations.
The tests of several sensors and simulations of sensor-electronics combinations were completed in 1993. The results were included in the design of a roll-pitch measurement set. At the end of 1993 the building of this set was well advanced.
Other results were included in the design and building of a wave height measuring buoy for the measurement of the short waves
en-countered in inland waters.
The measurement set that, is currently being built, gives, results
equal to or better than commonly used vertical gyroscopes Other advantages are low-cost, maintenance free, noise free, compact and
low power. Due to its modular design, upgrading with new or better sensors is simple.. Also, the set can be easily extended to
measure accelerations as well. Finally, the.possibffity is considered
to include sensors for course measurements at ships as well,
thereby 'making the measurement set a six degrees of freedom unit.The wave height measuring buoy' was successfully used during
large scale model experiments, in "Het Hollands Diep".
9. RESEARCH FACHA i OF THE SHIP
HYDRO-MECHANICS LABORATORY
For experimental research the Ship hydromechanics
Laboratory has at its disposalof the following facilities:
TOWING TANK.NO. :1
Length :: 142.00 m Width : 4.22 rn
Water-depth : 2.501m
Carriage : manned, motor driven
Carriage speed : 7.00 mis (maximum)
Capàbiities : Horizontal and Vertical PMM can be fitted
Wavemaker type : flap:type, electronic/hydraulic
Wavelength : length3O - 6MO m, regular and irregular
Tests performed : Resistance in calm water and waves. Open Wäter Propeller test.
PMM-test on floating and submerged bodies, foils etc.
Wave induced motions and loads on ships and floating and moored stnictures
Slamming phenomena.
Upright and heeled sailing yacht tests.
Length 8500 rn
Width : 2.75 rn
Water-depth : 1.25 m
Carriage : manned, motor driven
Carnage speed : 3.00 rn/s (maximum)
Wavemaker type : flap type,; electronic/hydraulic
Wave length : length 0.40 - 6.50 m, regular and irregular
TOWING TANK NO.2
Test performed Resistance and self-propulsion incairn water
and waves;
Open Water Propeller tests.
Wave inducec motions and loads on ships and floating and moored structures upright and heeled sailing yacht tests.
CAVITATION TUNML
Facility : Kempf und Remmers, closed recircülation
tunnel.
Drive system : 4-bladed axial flow propeller with Ward Leonard control.
Motor Power 15 Kw, (total) - 2920 rpm.
Pressures 102 kPa (max) 11 kPa (nun)
Instrumentation : Propeller dynainometer, 5-hole pitot-tube, various pressUre sensors, Laser Doppler
Anemometry.
Type and location of torque and thrust
dynamometer : balance T- and Q dynamometer at the end of propeller shaft,
Tmax 400 N, Q,max 10 Nm.
Propeller or model
size range : Propeller diameters from 50 - 160 mm.
Tets performed Propeller tests in uniform flows. Forces and pressure distributions on rudder,, fins etc.
10. REPORTS AND PUBLICATIONS OF THE SHIP
'HYDROMIECHANICS LABORATORY.
Terwisga, Ir P.F. van,
'Handleiding bij de progralnmatuur voor de berekening van weer-. stand, trim en inzinking van planerende schepen, gebaseerd op metingen aan een systematisch gevarieerde serie. modellen.', Report. No. 90-M-1.993, TU Deift.
Terwisga, Ir. P.F. van,
'Source listings van de programmatuur voor de berekening van
weerstand, trim en inzinkingvan planerendeschepen,, gebaseerdop metingen aan een systematisch gevarieerde serie modellen', Rapport No. 961-M-1993, TU Deift.
Terw:isga, Ir.. P.F.. van,
'Weerstand en trim berekening volgens Savitsky.; Een beschrijving
van het . rekenmodel, een vergelijking met systematische model
series en een handleiding voor het programma SAVITSKY', Rapport 962-M-1993, TU Deift.
Pinkster, Prof.dr..ir. J.A.,
'Motions and Thruster forces of DPpipe laying vessel SOUTAIRE in long-crested and directionally spread seas',
Commissioned by: Atlantic Point Inc., 5 Route de la Coula', '1618 Chatel - St-Denis, Switserland, .
Report No. 963-O-1993, TU Deift. ' . s
Quadvlieg, Ir. F.H.H.A.,,
Handleiding "Anismatie 2.0,". Een..:animatie.paldcet.voor tijdsdomein
simulatieprogramma's',
Rapport No. 964-1993, Tu Deffi.
Pinkster, Prof.dr.ir J.A. and li. .H.R., Luth,
'The reduction of low frequency motioñs of moored FPSO' s',
Offshore Technology Conference OTC, May 1993, Houston,
Texas, USA,
Report No. 965-P-1993, TU D1ft.
Pinkster, Prof.dr.ir., J.A.,, Ir A. Dercksen and A.K. Dey,
'Hydrodynamic Aspects of Moored Semi-Submersibles and TLP's',;
Offshore Technology Conference OTC, May 1993, Houston,
Texas, USA,
Report No. 966-P-1993, TU Deift.
'Annual report 1992. of the Ship Hydromechanics Laboratory', Report No: 967-1993, TU Deift.
Journée, Ir. J.M.J.,
'Hydromechanic Coefficients to Calculate the Motions of Cutter Dredgers in the. Time Domain by Cummms Equations',
Report No 968-1993, TU Deift..
Journée, Ir. J.M.J.,
User Manual of Program SEAWAY-D14. 1.0, a Pre-Processing Program of DREDMO/4.0,
Report .969-1993, TU: Delft .
Terwisga, Ir. PF. van,
Meetrapport Catamaran "Why Not", Opdrachtgever: Matume Ud, Amersfòort, Report No. 970-O-1993., TU Deift.
Dev,Arun.K.., BScEnggMSc CEng.,
'Current and wind loads on semisubmersib1es (SSBs)':and tension
leg platfonns (TLPs)', . . .
Report No. 971-1993, TU Deffi.
Dey, Arun K., BScEnng.. MSc. CEflg,
'Experimental investigations of viscous mean forces on a fixed vertical circular cylinder in waves and currents',
Part VI: Recorded data and prepared tables, Report No. 972-M-1993, TU Deift.
Adegeest, ir. L.J.M.,
'Some Effects of Application of a Nonlinear Simulation-Model on Ship Responses in Severe Seas',
Report No. 973-1993, TU Deift. Beukelman, Ing. W.,,
'Lift and drag for a low-aspect ratio surface piercing wing-model in deep and shallow water',
MEMT,, ISSN 0925-6555;29,, ISBN 90-370-0095-9, Report No. 974-1993, TU Deift.
Adegeest, Ir. L.J.M.,
'Experimental results of motion, shear force and bending moment measurements in large amplitude regular waves for a Wigley model with bow fiare'.,
Report Ño. 975-1993, TU Deift.
Keuning, Ir. J.A. and Ir. F.H.H.A. Qtiadvlieg,
'Dynamic Behaviour of Fast Monohulls',
International' Conference on High Speed Passenger 'Craft-Future
Developments and the Nordic Initiative, Proedings, 15-16 June
1993, The Royal Institution of Naval Architects, London, UK, Report No. 977-P-1993, TU Deift.
Journée, Ir. J.M.J.,
'CalculatIons of Struck-Ship Motions by Using the Cummins
Equations with Strip Theory 'Potential Coefficients', Opdrachtgever: TN0-CMC Leeghwaterstraat 5,, DelIt,
Report No. 978-04993, TU Deift.
Terwisga, Ir. P.F. van,
'Meetrapport en Voortstuwingsberekening van een planerend
motorjacht',
Opdrachtgever: W. de Vries Lentsch, Bureau voor Scheepsbouw,
Amsterdam,
Report No. 979-O-1993, TU Deift. Veer, Riaan van 't,
'Catamaran Seakeeping Prediction', Volume 1,
'First-Order Hydrodynamics Loads on Twin Sections', Volume 2,
Script,
'Catamaran Seakeeping Prediction', Volume 3, Student Thesis, Report No. 980-S-1993, TU Deift.
Vredeveldt, Ir. A.W. (TNO) and Ir. J.M.J. Journée (TUD),
'Ship motions due to sudden water ingress', Theory,
TNO-Report B-92-1040,
Report No. 981-1993, TU Deift.
Journée, Ir. J.M.J.,
'Motions of Struck-Ship after a Collission',
Commissioned by: TNO-CMC, Leeghwaterstraat 5, Deift, Report No. 982-O-1993, TU Deift.
Pinkster, Prof.dr.ir. J.A.,
'Motions and Mean Drift Forces on Solitaire',
Commissioned by: Ailseas Eng., P.O. Box 5074, Delft, Report No. 982-O-1993, TU Deffi.
Adegeest, Ir. L.J.M.,
'Some Effects of Application of a Nonlinear Simulation Model on Ship Responses',
The Eight mt. Workshop on Water Waves and Floating Bodies,
Nat. Research Council Canada, St.John's, Newfoundland, May'93, Report No. 984-P-1993, TU Deift.
Keuning, Ir. J.A., Ir. P.F. van Terwisga and Ir. L.J.M. Adegeest,
'Experimental and Numerical Investigation into Wave Exciting
Surge Forces in Large Following Waves',
FAST'93, Second International Conference on Fast Sea Transporta-tion, 13-16 Dec1'93, Yokohama, Japan,
Report No. 985-P-1993, TU Deift. Berg, Kuno van den,
'Het zeegangsgedrag van het Surface Effect Ship (SES)'; een
interim rapport, Cursuswerk,
'Het zeegangsgedrag van het Surface Effect Ship (SES)';
Model-proeven met een luchtkussen en verificatie van het
simulatie.-programma SEASES, Ingenieurswerk, Report Ño. 986-S-1993, TU Deift.
Dey, Arun Kr., BScEngg. MSc. CEng.,
'Hydrodynamic forces on a fixed submerged pontoon in waves and
currents', Part I and Part II: Experimental Data,
Report No. 987-M-1993, TU Deift.
Adegeest, Ir. L.J.M.,
Third-Order Volterra Modeling of Ship Responses Based on
Regular Wave Results',Report No. 988-1993, TU Deift. Pinkster, Prof.dr.ir. J.A.,
'Golven zijn nooit te vertrouwen',
Publicatie in het Magazien "KIJK" van december 1993, Report No. 989-P-1993, TU Deift.
Pinkster, Prof.dr.ir. J.A.,
'Onderzoek in de Scheepshydroemchanica',
Lu strum Symposium NVTS/Scheepsbouwkundig Gezelschap
"William Froude",
Report No. 990-P-1993, TU Deift.
Report not marked with or can be ordered by mail
or fax at apriceofDfl. 25,= each plus VAT (at present 6%) and mailing expenses by P.W. de Heer, Librarian.
An invoice will be included; please do not send payment in advance.
If yoU want the Catalogue of Reports of the Ship
Hydrome-chanics Laboratory sent.a letter toP.W. de Heer.
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