Deift University of Technology
Annual Report 1995
Facultyof Mechanical Engineering and Marine Technology Ship Hydromechanics Laboratory
Report No. 1045
June 1996
ANNUAL REPORT 1995
Edited by P.W. De Heer
Deift University of Technology Dep. of MedianiCal Engineering and Marine Technology
Mekelweg 2, 2628 CD Deift The Netherlands
INTRODUCTION
This annual report covers the activities of the Ship Hydromechanics
section, one of the four sections comprising the department of Marine
Technology of the Faculty of Mechanical Engineering and Marine
Technology of the Deift University of Technology, the other sections being those of Ship Design, Ship Construction and Shipbuilding. The report is distributed internationally to approximately 400 institutes
and persons active in the field of Marine Technology. Readers are
invited to give their comments regarding the contents and may obtain copies of those research reports which are in the public domain.
CONTENTS
ORGANIZATION OF THE SHIP HYDROMECHANICS LABORATORY
DOCTOR'S THESES
EDUCATIONAL PROGRAM
STUDENT THESIS
MEMBERSHIPS OF INTERNATIONAL
ORGANIZA-TIONS
CONTRIBUTIONS TO SYMPOSIA, CONGRESSES ETC.
PUBLIC ASSISTANCE
SCIENTIFIC SUPPORT TO PROJECTS IN OTHER
FACULTIES
RESEARCH
RESEARCH FACILITIES OF THE SHIP HYDRO-MECHANICS LABORATORY
REPORTS AND PUBLICATIONS OF THE SHIP
HYDROMECHANICS LABORATORY
1. ORGANiZATION OF THE SHIP HYDROMECHANICS LABORATORY Mekelweg 2, 2628CD Deift, The Netherlands Phone: +31 15 2786882 Fax: +31 15 2781836
Phone: +31
15-Boani:Prof.dr. ir. J:.A. Piflkster (chairman) 2783598
Dr.Ir. J.A. Keuning (secretary) 2781897
b. J.M.J Journée
(member) 2783881Ing. A. Goeman (member) 2781893
Permanent Staffi
Prof.dr.fr. J.A. Pinkster 2783598
Prof.dr ir. G. .Kuiper' 2786860
Ir. J.M.J. JoUrnée 2783881
Dr. ir J.A. Keuning
2781897Dr.ir. H.J. de Koning Gans 2781852
Ir. J. Ooms 2783876
Ing. A.A.M. van Gulik 2784684
IngÄ. Versluis
2783871Instruction- and Research Assistants:
Ing. C Born 2786870 Ing. A. Goeman 2781893 P.W. de Heer 2786873 R. Onñink 2786872 Secretary: Mrs. P.J: Trijzelaar-Verduin
2786882
3.
During this year the following persons left the Ship Jydromechanics Laboratory:
01-01-1995 L.J.M. Adegeest (MARIN, Wageningen) O1O5 1995 B. Dainmers (Retired)
Libnirian:
P.W. de Heer 2786873 Laboratory Managen Ing. A. Goeman 2781893 Flectronic Devices: Ir. J. Ooms 2783876R. van den Oever 2781590
Models:
C.A.C.M. van der.Bergh 2786875
Mechanic Devices:
Ing. C.P. Poot 2783745
B. Dammers 2786877
H. van der Hek
..
2786877Ph.D. Students:
Arun Kr. Dey, BScEngg. MSc. CEng. . 2781570
Ir. J.C. Moulin
..
27855622DOCTOR'S THESES
Atthe Ship Hydromechanics Laboratory thefollowing persons were working on their doctor's thesis:
Doctor's Thesis, January 9, 1995 at the Deift University of
Technology
Ir. L.J.M. Adegeest on the theme:
'Nòñlinear Hull Girder :lòads in ships'
Supervisor: Prof.dr.ir. LA. Pinkster
Am Kr. Dey, BScEngg. MSc. CEng. on the theme:
'Hydrodynamic Aspects of Moored Semi-Submersibles in Extreme Seas'
Supervisor: Prof.dr.ir. J.A. Pinkter
Veèr, Ir. A.P van 't
'Catamaran Sea-Keeping Predictions'
Supervisor: Prof.dr.ir. J.A. Pinkster
Moulijn,IrJoC.
'Motions and added resistance of Surface EffectS Ships'
3. EDUCATIONAL PROGRAM (in Dutch)
Prof.dr.ir. J.A. Pinkster
MT513, 'Ship Motions änd Steering I' Part 1: Ship Motions
Part 2: Steering and manoeuvring Part 3: Waves
MTS14, 'Ship Motions and Steering II'
Part 1: Steering
Part 2: Ship Motions
Prof.dr.ir. G. Kuiper
MT512, 'Resistanceand Propúlsion' (in English)
Ir. J.M.J. Journée.
XZMT1, 'Offshore Hydromechanics'
Xl,
'Offshore Technology'Dr.Ir. J.A. Keuning
WbmlO7, 'Technical Systems' MT51O, 'Geometric and Stability'
STUDENT THESES
16-01-1995
Siregar, F.R.T.
'The hydrodynamic interaction effects between two
'demi-huils of :a catamaran advancing in head waves'. 24-08-1995
Levadou, M.M,D.
'Added Resistance in Waves of Sailing Yachts'.
MEMBERSHIPS, OFJNTERNA TIONAL. ORGANiZATIONS
Member Advisory board Offshore MARIN. KIVI/MarTec, Chairman.
Ocean Engineering: International editor.
International Shipbuilding Progress (ISP): Senior editor. SNAME
mt. Techn. committee of Offshore Racing Council, London High Speed Marine Vehicles Committee of the International
Towing Tank Conference
Chairman of the Organisation Committee of International
6. CONTRIBUTIONS TO SYMPOSIA, CONGRESSES etc.
'Wing-Body Interaction on a Sailing Vächt',
by 'Dr.ir. J.A. Keuning and Ir. G. Kapsenberg
The Twelfth Chesapeake Sailing Yacht Symposium, The
Society of Naval Architects and Marine Engineers (SNAME),
601 Pavonia Avenue, Jersey City, USA, January 28, 1995 'The Influence of thé WakeModel onInduced Velocities in
the Propeller Planer',
by Ir. J.C. Moulijn and Prof.dr.ir. G. Kwper
PROPCAVE '95, An International Conference on Propeller Cavitation to celebrate lOO years f Propeller Cavitation
Research, Newcastle upon Tyne, U .:K, May 16-18, 1995
'Hydrodynamic interaction effects in waves',
by Prof.dr.ir. JA. Pinkster
ISOPE. '95,, Fifth International Offshore and Polar
Engineering Conference, The Hague, The Netherlands, June
11.-16,. 1995 Delft University of Technology, the Netherlands
'Viscous Mean Drift Forces on Moored Semi-Submer-sibles', by Arun K. Dey, BScEnng.MSc.CEng
ISOPE '95,. Fifth International Offshore and Polar Engineering Conference, The Hague, The Netherlands, June 1116,. 1995 ,Delft University of Technology, the Netherlands
'First order wave loads ¡n beam waves',.
by Jr. J.M.J. Journée and Ir. A.P. Van 't Veer
¡SOPE '95, Fifth International Offshore and Polar Engineering Conference, The Hague, The Netherlands, June 11-16, 1995 Delft University of Technology, the Netherlands
'Optimisation of the seakeeping behaviour of fast
monohuH', by Dr.ir. J.A. Keuning and Ir. J. Pinkster
FAST '95, Third International Conference on Fats Sea
Transportation, MARITIM Strandhotel,.Lübeck-Travemünde, Germany, September 25-27, 1995
'The interaction effects on a catamaran traveling with
forward speed in waves',
by Ir. A.P. van 't Veer and Ir. F.R.T. Siregar
FAST '95.,
Third International Conference on Fats Sea
Transportation, MARITIM Strandhotel, Lübeck-Travemünde, Germany, September 25-27, 1995
'SELECTED PAPERS
IL SWA SYMPOSTI1TM
ON..
YACHT ARCIIITECTURE
1969
- 1994'
During the last 25 years a continüing interest iñ the papers
presented at the biannual 'International Symposia on Yacht
Résearch and Yacht Construction", held in the period
1971 -1994 in Amsterdam, has been shown.The Subjects treated coñcern sailing- and rnotoryacht research, design, strength, and production methods, as well as aspects of
classification and safety.
As the printed volumes of each Symposium are not any more
availabie a selection of the presented. papers
in the ábove
mentioned periOd is now collected in One volume comprising in total 626 pages.
This collection offérs
a wealth
of information for
yacht designers, yachtbuilders and the interested yachtsman.Price per Volume: Dfl. 95,00 (Students Dfl. 75,00)
If you are interested in this Volume please sent a letter to: P.W. de Heer, DeIft University of Technology,
Ship-Hydromechanics Lab. Mekelweg 2,
7.
COMMERCIAL WORK
During this period considered the Laboratory, besides its
normal research,
provided (payed) services foE Industry andGovernment. This included model tests, full scale trialsstudiesetc. In
1994 thenext projects have been carñéd out:
'Aanvullende berekeningen t.b.v: de
scheepsbewegings-simulator van TNO-TM',
TNO-Technische Mensktinde, Kampweg 5, 3769 DE
Soesterberg, Nederland.
'Motions and added resistance of Surface Effect Ships; Literature survey a.nd a programme of neW research',.
Marine Safety Rotterdam By, Wilhelminakade 701, Rotterdam, Nederland.
'Metingefl aan een zeiljacht model met Rotáry Whig', Lumiflex Precision Engineering, Nijverheidsweg-N. 60,
Amersfoort, Nederland.
'thodstender VOYAGER, deel ila: Hydromechanisch gedrag',
Loodswezen BV, Kanaaldijk 242, Umuiden, Néderland.
'Lóodstender VOYAGER, deel lib: "Langeduu?' metingen',
Loodswezeti BY, Kanaaldijk242, limuiden, Nederland.
- 'Loodstender VOYAGER, dccl IV
Loodswezen BV, Kanaaldijk242, lJmuiden, Nederland.
'Motions and Loads on a LPC-Vessel', GEFONZO BV, Veere, The Netherlands.
'Experiments on the dynamic beha'iour of 'Ferry-62 during
a sudden Ingress of water due to a collision amidships', TNO-CMC, Leeghwaterstraat 5, Delft, The Netherlands.
'Simulations of the motions and loads for the M-frigate
MF 19',
Royal Dutch Navy, P.O.Box 20702, The Hague, The
Netherlands.
'Development of a. 3-D computational Method for a, SES: at
Zero Forward Speed',
MARIN, 1'.O.Box 28, Wageningen, The Netherlands
8
SCIENTIFIC SUPPORT TO PROJECTS. IN OTHER
FACULTIES
Scientific support was. given for the following final year student
projects:,Deep water moorings for a large semi-submersible Student:. P. Nederlof .
Faculty.: Civil Engineering, Dept. of Offshore Technology Support: General
Behaviour, of a large floating airport supported by
semi-submersibles
Student:, A.T.F.M. van Stiphout and P..G.P. Ferler.
Faculty: Civil Engineering, Dept. of Offshore Technology
Support: Multi-body 3-dimensional diffraction computations Deep water breakwater
Student: N.J. Nederstigt
Faculty:. Civil Engineering, Dept. of Fluid Mechanics Support: Model tests and 3-dimensional diffraction
computations
Influence of mooring lines on damping of low-frequency.
motions
Studènt:R.M.:Raaijmakers
Faculty: Civil' Engineering, Dept. of Offshore Technology Support: Model tests . .
Design of a concrete floating production ship
Student: C. van Pelt
Faculty: Civil Engineering, Dept. of Offshore Technology Support: 3-dimensional diffraction computations
LL
Carriage Towing Tank No.1 of the Shiphydromechanics Laboratory
9. RESEARCH
The field of shiphy4romechanics covers all aspects of the interaction
between the surrounding water and fixed or floating structures. This
interaction manifests itself in fluid motions and pressures,
hydromechanic loads on the structures and in the motion behaviour of the structures.
For an optimisation of the design or the maritime operations of vessels
and floating structures in still water and in waves, an insight in the physical aspects of the hydromechanic behaviour of these structurçs
is essential. Based on insight in these physical aspects, mathematical
models need to
be developed
for the determinationof the
hydromechanic and wave loads on and the motion behaviour of fixed or floating structures.In still water, the resistance and the propulsion in relation to the
forward speed is an important factor. Savings on energy can be
obtained by an improved design of the huliform and an increase of the
propulsive efficiency. The results of research in this field are a basis
for a full technical-economical analysis of alternative design concepts,
such as prime costs, investments, operational costs and proflts
Research on wind propulsion and other alternative propulsors willcontribute to these aspects too.
Together with the dynamic behaviour of a ship during an ingress of
water after a collision, the stability of the intact and the damaged ship
is defining for the safety of the crew and the ship. Manoeuvring
properties are of importance for the safety of ships Insight in the
physics are required, not only to improve these properties but also for developing manoeuvring simulators, marine traffic systems, etc.
The linear and non-linear dynamic behaviour of ships and other
maritime structures in waves depends on the hydrornechanic loads and
the wave loads. This dynamic behaviour is of major interest with
respect to the.strength of the structure, mooring loads, shipping water, slamming, systems to reduce motions, dynamic positioning and safety.
Also secundary effects,
like optimum routeing, increasô of fuel
consumption, peaks inaccelerations,comfort-of-crewand-passengersand seasickness, rule the operational limits.
Advanced ships, such as planing, or semi-planing ships, hydrofoil ships, catamarans, SES (Surface Effect Ships) and SWATH (Small
Waterplane Area Twin Hull) ships, demand new approaches indesign
and operation. For this it is required to develop new mathematical
models, which have to be verified by model tests inthe laboratory and full scale experiments at sea. These mathematical models are a guide
in the development of criteria, to be used in the design proces, in
which is accounted for the expected sea conditiOns.
For thecalculation of loads and motions in waves, two approaches can
be followed: the frequency domain approach for a linear(ised)
behaviour and the time domain for a non-linear behaviour., The
hydromechanic coefficients of ships and other slender bodies can beobtained by 2-D techniques. In many cases, offshore structures require a 3-D approach. In case of multi-body systems, for interaction effects
have to be accounted for.
Depending on the (commercial) problem, research in these areas takes
place in cooperation with (or by order of) the authorities (DGSM,
1MO, KM), institutes (MARIN, TNO, DHL) or with qualified
engineering consultances (Gusto, Aliseas, Bluewater). International cooperation with other universities and institues takes place via the IrFC and the ORC.The main research areas, topics and achievements of the Delft Ship-.
hydromechanics Laboratory in 1995 in this field are listed belòw.
Moored semi-submersibles (A. Dey MSc.)
For this PhD project, experiments have been continued, for an ITTC
semi-submersible model in soft moOred condition. The tests have been
done for a wide range of parameters in regular and irregular waves for head and beam sea conditions, with zero forward speed and with a forward speed to simulâte currents.
Data analysis for regular waves show encouraging results for the
second order mean drift forces, compared to experimental results,when viscous effects are taken into account. Further, excellent
comparisons are noticed for first order forces and motions as well.
Time domain analysis has carried out for taking account of viscous
effects in the low frequency drift forces. The said analysis includes experimental force coefficients from regular wave test results with
vertical cylinders and a submerged pontoon. The correlation between computed and measured low frequency drift forces is improved when viscous effects are added.
Results have been produced in internal reports and in a paper at the
¡SOPE '95 Conference.
The writing of the dissertation on the behaviour of moored
semi-submersibles in severe seaconditions is now in progress for its
submission in due course.
Semi-Submersible
Multi-hull vessels
(Ir. A.P. van 't Veer)
The objectives of this PhD project is to predict the motions of vessel, in particular a multi-hull vessel, sailing with forward speed in waves. To obtain the motions of the vessel the pressure on the wetted surface
of the vessel is predicted by using a potential flow and a Rankine source singularity on the discretised hull. The numerical results will
be validated against model test results.
The motions of the vessel are solved in the frequency domain using the Rankine source panel method. The hull is discretised using flat
panels and a constant source strength on each panel. The total
potential flow is devided in a basis flow, which is the double-bodyflow, and a steady and unsteady wave flow, which are assumed to be small compared with the basis flow.
A computer program has been written which solves the double-body potential for a mono-hull or multi-hull vessel.
Steady wave elevation around Wigley catamaran. Fn 0.30
Steady wave elevation around Wigley catamaran, Fn = 0.30 15
Using an analytical approach the second derivatives of the basis flow
are calculated and the rn-terms are calculated. Test calculations for a sphere are performed and good agreement has been found. To solve the steady or unsteady velocity potential the boundary conditions on
the hull and free surface must be known. A computer program to
calculate the conditions onthe discretised boundarieshas been written.
Using the strip theory approach,. the motions of a Wigley catamaran have been calculated by the computer program ASAP and compared with model test results. The results were presented on the FAST '95
Conference.
A computer program will be developed to solve the steady and
unsteady velocity potential for a multi-hull vessel, using the double body flow as the basis flow. Results will be compared with modelexperiments for validation.
Flow calculations
(Dr.ir. H.J. de Koning Gans)
A higher order surface panel method for flow calculations withcurved panels and a non-linear singularity distribution has been developed and
evaluated for the determination of the hydrodynamic influence of a moving ship or rotating propeller. The code of the panelmethod has been tested for flow calculations around a sphere, a Wigley hull, a three dimensional wing and a DTRC4 119 propeller and compared
with the results of other existing codes.
For the input of arbitrary shaped bodies a grid generation program is developed. This program can generate forms such as underwater hulls,
propellers (minding blades, hub and a wake) and rudders, simply. A method for the calculation of an unsteady free surfaces, using
cur-linear coordinates at the free surface, will be developed in cooperation
with MARIN. The velocity components in the flow field will be
calculated and a simulation program, which can predict the positionof moving free surfaces such as the wake of a propeller, will be
developed. The grid generation program wilE betended f01
generating more advanced body shapes.
3-D diffraction
(Prof.dr.ir. J.A. Pinkster)
The linear 3-D diffraction code has been extended to take into account
hydrodynamic 'interaction between' arbitrary numbers of fixed or
floating structures. A novel iterative technique fOr solving the
hydrodynamic equations for the multi-body cases was 'inplemented.The findings have been published at the ISOPE '95 Conference. The multi-body 3-D diffraction code will be extended to include mean and low-frequency second order wave forces on the different bOdies.
Behaviour and safety of ships (Ir. J.M'.J. Journée)'
A simple estimation method of the 2-D diffraction loads for head,
beam and following waves has been developed. A simple solutiOn for intermediate wave directions has not been found yet. Also, a method
to obtain the dynamic swell-up of the incoming waves, caused the oscillating ship, was developed, tested and implemented in the code
SEAWAY. The results are reported in a paper at the ¡SOPE
'95Conference. The method toobtain thedynamic swell-uphas been used
in relative motion computations carried out for the SLF Load Lines
Working Group of 1MO. I
The time domain simulation model SEATIME las been extended with forward ship speed. This model'has been used by a student of the Ship
Design SectiOn for 'analysing the motion behaviour òf fishing nets. Also, the principle of the, model has. beeñ used by a student of the Systems and Control Group' for simulating, and analysing a MHD
propulsion. device under a 'pontoon.
In cooperation with the Ship Design Section, the results of full scale
experiments iñ the North Sea with a new pilot vessel have been
summarised in a paper.
Extensive capsize tests with two Ro-Ro models were completed and
the results-have-been-analysed. -In-cooperation-with--TNO/CMCand
DGSM, a selection of these data are being used now to verify the
simulation model' 'DYNING. .
18
A theoretical model to. describe the loads caused by sloshing in tanks with low .water levels has been developed and verified with available experimental data on free surface anti-rolling tanks.
The computer code to determine sloshing loads in tanks with low water levels will be extended to tanks with higher waterlevels. For this, work obtained from the NASA space program in the USA will
be used. Oscillation tests are required to verify the theoretical results.
To descibe the motions of a damaged ship after a collission, this
theory will be implemented in the simulation model DYNING. A part
of the research on the inflow of water in the ship after a collision
becomes a student thesis. These results will be implemented in
DYNING. too.
Advanced ships (Dr.ir. J.A. Keuning)
The' code FASTSHIP develOped by the Laboratory for the calculation of the non-linear behaviour of fast mono-hulls in head waves has been
further validated and tested for following
wave conditions. Theimplementatión of the 19 degrees deadrise series has been postponed
to next year due to lack of available towing tank time. The code has been used to carry out a research project on the socalled "Enlarged
Ship Concept': a standard design. of Damen Shipyard has been
stretched by 25 and 50 per cent respectively, whilst keeping the
payload and speed the same,. to optimise the workability in a seaway.
In cooperation with the Ship Design Section, the consequences on
building cost, operational cost, resistance, behaviour in waves and
operability have been analysed. The results of this study have been presented at the FAST '95 Conference. .
In cooperation with MARIN extensive series of experiments have been
carried out in the towing tank with two planing hull models in order
to establish hydrodynamic coefflcients of these hulls at forward ship speed, with different attitudes with respect to trim angle, sinkage, yaw and heel.
The results of the extensive series of experiments with two planing hull models, in order to establish hydrodynamic coefficients of these
hulls with respect to a large number of parameters, will be elaborated
in 1996 and implemented in FASTSHIP to yield the possibility of
course stability analysis.
In cooperation with the Royal Dutch Navy, the "Enlarged Ship Con-cept" will be further developed next year, with special emphasis on
the bow shape for possible use as an offshore patrol boat or a frigate. Yachts
(Ing. A. Versluis and dr ir; JA. Keuning)
The velocity prediction program (VPP) has been modified to
incorporate the possibility to use directly measured tank data on the resistance of one particular yacht hull. This makes a more accurate
prediction of the performance of that hull possible, if such resUlts' are
available. A similar approach has been followed with regard to
sailforce data obtained from windtunnel tests.
Since the resistance polynomials used in the VPP are being modified
to yield unappended hull results, a need was felt to predict the wave resistance of appendages of arbitrairy shape under an arbitrairy hull.
Therefore an extensive study has been performed on appendage
resistance and wing-body interaction on lift and drag, using both
advanced tank test data and CFD results supplied by MARIN.
The first results of this study have been presented at the SNAME '95
Chesapeake Sailing Yacht Symposium.
A further attempt to broaden the applicability of the VPP on more
radical designs has been undertaken by extending the Deift Series With a "far aft LCB" design. This work has been carried out in cooperátión
with the International Technical Committee (ITC) of the Ofshore
Racing Council (ORC) and will be used to improve their IMS
Handicap System.
.fter a real scale measurement excercise to measure the natural piteh period of sailing yachts in calm water in order to determine the radius of gyration in pitch, work also carried out in cooperation with the ITC
of the ORC, it was decidectto disregardftirtherdeve1opments in this area until a more accurate measuring device is available, capable of
measuring minute differences in this pitching period.
An extensive series of experiments has been carried out with five
different yacht hulls in waves in order to validate the results of
calculations using both 2-D and 3-D calculation methods for the added resistance of sailing yacht hulls in waves.
Computational results were obtained by SEAWAY (2-D) from DUT and SWAN (3-D) from MIT. The results have been reported and put at the disposal of both MIT and the ITC, which used these results for
dealing with this form of resistance in their VPP.
The study on appendage resistance and wing-body interaction will be
extended to include keel and hulls with a variety of geometries, in order to widen the applicability of the expressions. In addition, the
results of the tests with the Deift Systematic Yacht Hull Series will be
reanalysed to formulate new expressions for the induced resistance under leeway and heel.
21
Manoeuvring of ships
(Prof.drir. J.A. Pinkster and ing. W. Beukelman)
A calculation method for determining the hydrodynamic interaction
effécts of ships sailing in restricted waters has been develOped'. This
method, which is based on potential theory, takes into' accouñt the
effects of restrictéd waterdepth, bank suctión effects and hydrodynamic interaction from other passing vessels. A publication on the project is in preparation.
Manoeuvring coefficients ofa vertical hydrofoil-shaped huilform were
previously determined from, extensive series of model tests. A
comprehensive report on the model tests and on the analyses of theresults has been produced. The findings will be presented at an
international conference in 1996.
Model tests will be carried out to validate the excisting 3-D code for
computing hydrodynamic interaction between vessels sailing
inrestricted water.
22
Experimental techniques (Ir. J. Ooms)
For. a variety of tests with vessels and offshore structures, attentiOn was paid to the generation of irregular waves in the model basins of the Laboratory. For these tests. to be feasible it is mandatory that
waves with specified spectral properties can be generated quickly and
accurately. With the increasing. attention for non-linear problems
certain properties of the generated waves' are becoming more
importanti Ideally, but unachievable, thewaves generated should not show any non-linearities themselves and haveno energy below a
certain specified freqüency,.
An Autoregressive Moving Average (ARMA) spectral estimation
procedure is developed that is used to fita realizable 'filter to. a given theoretical spectrum like the Bretschneideror JONS WAP. 'Additional
measures were taken to further reduce the remaining low-frequency
wave energy and to include a simple model for the wavemaker
transfer function. In addition regular wave tests were carried out in the Towing Tank I to verify the wavemaker transfer function and tocheck the non-linearitjes due to the wavemaker and the wave
mechanisms. Only at the end a JONS WAP signal was generated for
a first verificatiOn of the ARMA fitting procedure The theoretical work was laid down in an internal report.
Results of the wavernaker tests are currently being processed. The
results will be combined into 'one report. The
wavemaker testsindicated that the wave generator contributed to the non-linearities 'in
the waves. It will therefore be investigated as to what extent this can be reduced for both regular and irregular waves, liso, attention will
be paid to another source of inaccuracies in
model tests: wavereflections on the wave damping beach. Additional tests ¡n the model
basin will be carried out to support the work.
Hydromechanic aspects in CAD/CAM (Ir. J..M.J. Journée and Ing. A. Versluis)
TraforD is a computer code for generating huilforms from a number
of predefined huilforms. For a user's friendly operation under
Windows of this program a control program TransMan has been
develOped.Based on the radiated wave energy approach, a prediction method for
the diffraction wave loads in head and beam seas and for the
amplification of the incoming waves by the oscillating ship has been
developed and tested. These phenomena have been implemented in the ship motions program SEAWAY for design purposes.
For drawing the body plan, the profile view and the plan view during the ship design'process, the DMP routines of the Houston plotter will
be extended with 'HPGL routines, suitable for HP plotters and
ptinters.I.I. Iil ¡ I I I
Ne.: StY VESS.
.'.-24
I I I i L I. I
I. I i I
10.
RESEARCH FACILITIES OF THE SHIP
HYDRO-MECHANICS LABORATORYFor experimental research the Ship hydromechanics Laboratory has at its disposal of the following facilities:
TOWiNG TANK NO. i
Length
: 142.00m
Width : 4.22 m
Water-depth : 2.50 m
Carriage : manned, motor driven Carriage speed : 7.00 rn/s (maximum)
Capabilities : Horizontal and Vertical PMM can be fitted Wavemaker type : flap type, electronic/hydraulic
Wavelength : length 0.30 - 6.00 m, regular and irregular
Tests performed : Resistance in calm water and waves. Open Water Propeller test.
PMM-test on floating and submerged
bodies, foils etc.
Wave induced motions and loads on ships and floating and moored structures Slamming phenomena.
Upright and heeled sailing yacht tests.
Length Width Water-depth Carriage Carriage speed Wavemaker type Wave length Test performed
TOWING TANK NO. 2
85.00 m 2.75 m
1.25m
manned, motor driven
3.00 rn/s (maximum)
flap type, electronic/hydraulic
length 0.40 - 6.50 m, regular and irregular
Resistance and self-propulsion in calm 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.
Towing Tank No.1 of the Ship Hydromechanics Laboratory
CAVITATION TUNNFL
Facility : Kempf und Remmers, closed recirculation tunnel.
Drive system. 4b1aded axial flow propeller with Ward
Leonard
control.-Motor Power : 15 Kw, (total) - 2920 rpm.. Pressures : 102 kPa (max) - 11 kPa (mm)
Instrumentation Propeller dynamometer, 5-hole pitot-tube, various pressúre 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 l'o Nm.
Propeller or model
size range Propeller dlameters. from 50 - 160 mm. Tete performed : Propeller testsin üniform flOws. Forcesand
pressure distributions on rudder, fins etc.
il.
REPORTS AND PUBLiCATIONS OF THE SHIPHYDRO-MECHANJCS LABORATORY
Ooms Ir. J.,..
'Aanvullende berekeningen t.b.v. de scheepsbewegingssimulator van TNO-TM',
Opdrachtgever: TNO-Technische Menskunde, Soesterberg, Nederland,
Rapport No.
1022-O-1995, Ship Hydromechanics Laboratory, University of Technology DeiftMoulijn, Ir. J.C.,
'Motions and added resistance of Surface Effect Ships; Literature survey and aprogramme of new research', .
Commissioned by: The Royal Dutch Navy, The Netherlands Report No. 1023-O-1995, University of Technology Delft
Siregar, F.R.T.,
'Experimental results of the Wigley hull form with advancing forward speed in head waves', . .
..
Report No. 1024-1995, University of Technology Delft
Pinkster, Prof.dr.ir. J.A.,
'Hydrodynamic interaction effect in waves',
¡SOPE. '95,
Fifth International Offshore and Polar Engineering
Conference, The Hague, The Netherlands, June 11-16, 1995,Report No., 1025P4995, University of Technology Delft
Dey, BScEnng.MSc.CEng Arun K.,
'Viscous Mean Drift Forces on Moored Semi-Submersibles',
¡SOPE '95, Fifth International Offshore and Polar Engineering
Conference, The Hague, The Netherlands, June 11-16, 1995,Report No. 1026-P-1995, University of Technology Deift
Journée, Ir. J.M.J. and Ir. A.P. van't Veer, 'First order wave loads in beam waves',
SOPE'95;Fifthkteiitional Offshore and Polar Engineering
Conference, The Hague, The Netherlands, June 11-16, 1995,
Report No. 1027-P-1995, University of Technology Deift
Moulijn, Ir. J.C. and Prof.dr.ir. G. Kuiper,
'The Influence of the Wake Model on Inducéd Velocities in the
Propeller Plane',PROPCAV '95, International. Conference on Propeller Cavitation to
celibrate 1:00 years of Propeller Cavitation Research, May 16-18,
1995, Newcastle upon Tyne, United Kingdom,
Report No. 1028-P-1995, University of Technology Delft
Heer, P.W. de, editor, 'Annual Report 1994',
Report No. 1029-1995, University of Technology Delft
Dey, BScEnng.MSc.CEng Arun K.,
'Hydrodynamic Forces on a Fixed Semi-Submersible in Waves and Cuurents', Part III: Model Test Data,
Report No. 1030..M1995, University of Technology Deift Dey, BScEnng.MSc.CEng Awn K.,
'Motion Behaviour of a Floating Semi-Submersible in Waves and Currents', Part ifi: Model Test Data, .
Report No. 103 1M-1995, University of Technology Deift Levadou, M.M.D.,,
'Added Resistance in Waves of Sailing Yachts',, A comparison of two
computational methods to calculate the added resistance in waves of sailing yachts, Student Thesis,
Report No.. 1032-S-1995,. University of Technolögy Deift
Beenen, M.,
'Model experiments on fixed small, Tension Leg Platform in Waves', Script,
Report No. 1033-S-1995, University. of Technology Deift
Journée, Ir. J.M.J. and R. Onnink,
'The Dynamic Behaviour of Ferry-72 during a Sudden Ingress of
water',Commissioned by: TNO-CMC, Delft, The Netherlands,
Report No. :I034Ø1995, University of TechnOlogy Deift
29
Keuning, Dr.ir. J.A. and li. J. Pinkster,
'Optimisation of the Seakeeping behaviour of a fast monohull',
FAST '95, Third International Conference on Fast Sea Transportation, Lübeck-Travemtinde, Germany,, September 25-27; 1995,
Report No. 1035-P1995, University of Technology Deift Koning Gans, Dr.ir. H.J. de,
'Potential Flow calculations on the DTRC4 119 Propeller', Commissioned by: MARIN, Wageningen, The. Netherlands, Report No. l-036-O-1995, University of Technology Delft
Veer, Ir. A.P. van't and Ir. F.R.T. Siregar,
'The interaction effects on a catamaran traveling with forward- speed
in waves',. .
-FAST '95, Third International Confetence onFast Sea Transportation, Lübeck-Travemünde, Germany, September 25-27, 1-995,
--Report No. 1037-P-1995, University of Technology Deift
Pinkster,-Prof.dr;ir. J.A,
--'Computations of Hydrodynamic Forces on a Barge approaching a
submerged structure',
.-:-
--Commissioned by: TNO-CMC, Delft, The Netherlands,Report No. 1038-O-1995, University of Technology Delft
Keuning, Dr.ir. J.A. and-b. J-.Ooms,'
- - - ---'Capsizing. Experiment with the Model SAR 2000',: - - - - -
-Commissioned -by: Damen Shipyards,- Gorinchem, The Netherlands, Report No. 1039-O-1995, University of Technology Deift
Keuning, Dr.irJ.A. en Ing. C.J. Born,- - -
.
- --'Handleiding 2 jaars oefening "Scheepshydromechanica" mt5 lop?, Rapport No., 1040-K-1995, Technische UniverSiteitDelft --. -
-Wertheim, A.H., G.J. Groene and J. Ooms, - - - -
'Seasickness and performance measuresaboard theHr; Ms. Tydeman', -TNOTMl995-A48,- -TNO-Human--Factors--Research--Institute, - - -.
Commissioned by: The Dutch Navy, The Netherlands, - - -
--Report No. 1041--O--1995, University of:Technology Deift
Pinkster, Prof.dr.ir. J.A. and Ing. A., Versluis, 'Motions of a Supply Vessel to FPSO - Uisge Gorm',
Commissioned by: Bluewater Engineering, Hoofddorp, The Netherlands.
Report No. 1042-O-1995, University of Technology Deift
Ooms, Ir. J.,
'The Generatión of Irregular Waves in the Number i Model Basin', Report No. 1043-M-1995, University of Technology Deift
Journée, Ir. J.M.J.,
'Vertical Relative Motions in Head Waves ofa Containervessel and
a Bulkcarrier',
Report No. 10441:995, University of Technology DeIft
Report not marked with Q or
M can be ordered by mail or fax ata price of Dfl. 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 Hydromechamcs Laboratory sent a ltter to P.W. de Heer.
