Model experiments on the wave loads of T2-SE-A1 tanker in regular waves

ARCÑJEF

Lab. y, &hepbouwkunde

ih&sche

Hogeschoo

Deift

.1 tj s . ht) tC) r 1. A_x i;1 xuE F. ,( :.

ì'

t' -

.j

I i cf abLes, ii:11res, and Ihotos.

1. DescrintioUs of Tts

Jnr icilars fol the tes t condi tionS .

,$tI(! J. t

;t ror;rn

: e i.

rticutrs for the test

onditior

I I i N 1 ri tiuhS for t

tt arrancents

?if:!., i . i _ i .

tos for xuIIr'tA i

o1 te tts

k . - i . I PLL-ìe Ia

'f

k. I! eA s s t P ç. 1.1 .5 fly i, (-L t, 1 c4ìcì.-, h-L_')t) Be Lt LS f

HIIlJP! AI IiIIrIIIi "I)d e Ex ncr i t on tL e av c

- _{1. )escrir,tions of tie t.est}

i . 1. The iiode I

The shin mode i imiIat Lo

' :- L aniçer

the . -- -Al Taiier

of tctuai shin), uade of wood and lacqueFed.

i'he model has the five joiLIts, i . e . at ;r1ittshi7, and ± ?. 5,

± , Ti

tOT) frrn the Tnidshi. The 1o.i tulina I girders of i vvht

al toy are set itìite or the

i ()CkS a a stre»th member. he

separìted blocks ar rejointed each ther wi t'. the four

:aue-I)ar _{by attacling them 1r the Ioni tucliital íTir&ier at each section:}

Fhese arrangements a e ea ret 1. y irned so as to become the neu tra ax i s of the sys tm V he ho I I and I he strenrL g.i ìt

L.o )/2 fr,rri the l)OttOEfl flS ShOWO in Fig. t _{. i I . 2.}

ihe

satr-i/tness at -the joLnts is ra; otained by the Li.io r.u,her I cet

na:Led oy the 1uiI1. surface.

The sel f-propu Lsiorì motor aliti the saftins are accornoda ted

ir) te aft,nrr,ost bLock.

'Plie hen(Ji1g r(irne1t uelivered to the rodet is t:easured by

Hie ejçIit shetts of dec tric wir ì'ei stance train ga1ie pasted

on the tO fl R flJ. O ttoni surfac e i }mn e e h o f four aue-bars

ut each bLUt resr)ectively.

es ies ,

_{at the midhi}

Mection the 'SC) ÌOCL$ of strain

I1.e are a iso pasted o the bot 1P teral siues of eAch gauzf-*r.

in egu1ar Waves."

By Janame Tatiguch , sr . E .

Chief 01 Mi tSllhìshj E> ritrnenta i iai :. caçj ar)R.n)

'

Parej' to he presented nt the symnosiinì on the .:i.3.c., Nov.19C1 in (1asgoc

Fo r ev n rd

LS iS

the renort of the model exerir.

_{on iLe waveIot}

t)f .-SE-A1 'rar1er i n re!l1 I;r waves. arrie ru t. hr MI tsubish i

:nerì

ank (Nagasaki, Ja).

fhe rrojet has been

ner-CL

Jjflt study for j.

he held in Glasi i ve r, 961.

'i L S reor t the Ja ti f '. :ri ; _ortiy

ad

s i

the corn'mrison üf te exr)erimenta resùl ts with the theory and

'

fhe a

meas'iri r)iT

and COflfleCtl'fl 01' th(? strain gaw!es for

fl1fliPl)t3 an axial forces' are shown in Fi. 1-J.

These gan ars ' re ca libra tud one by one nuer i}

Ioni-tudinal Jorc*s before 1;e framing, and asu riae te faI

ca I i b rat i on Ufl(i(: the mire Iend i n

rnoen t uf ter te aues

re

ct.!flec t(?(1 lo the hu L t :'.e resul ts 01 this final calibration

coincide to ric 1'.iced from the c(i titration ot each pieces wi thin

iTe order of tb tolerance of the strain gauge factor. fhe final

caiibratin pIj I t; are doûted Cor the r:eastirement.

t'hc ode Las ;i cJm7ar( Li e !v ri id ('th. LrTlctl or aiong the

sui r long lAi as mentioned above, so the natural frequency of .

the verticni miti vibratiun (2 noUes) in stil L

\'aier is

1E c/s.

'he natural freqi'ncy i

'v -easured by thé resonance :ethod usin

the electro-netic exci. tatiori in stil I water.

?lìe acccle.orneter ( 10g, J5)c1s, strain g«uge type) are

also e(;uipped tn the fore and after ends of the model as S1ofl

in Pig. I . I ,

and the accej.eratioiis r,rai to the hase

i i ne of the model rire measured.

I. 2 .1 terns of the :tasiirethnts

. Le model is attachuI to te twoiiì

carr:e thr.u:rh te

lieavi1-i'i tchiii- anci u r i ¡i cRrder , an tie niode I has the

masts at i Ls fore and afLr Ls which are inserted in the

s4it

f two wires fixtd to the carriage as shown inì ?ig.l.i.

The model i s constrained to th& yawing and drifting, hut a

ii ttIf? hit of rol )j,i not inn is al lowed diirii ti

tests.

'he ode is sef-i'ope1 1e at tJQ model pointS, hrjwì\r1

thQ t}ìrusj, arid toz'rue are noi íiiéasnred.

'be ite:ns of the trt'nsure:ents are as follOWS:

i ) endiri !o:1en1 Of the hoi I (at 5 'joints ) . , ,'

2) .Pitchinz ¿

j) 1eaving z

4)

uriu

x

r)

VerticaL accterutiut at

oW 'L S1- LXF , (I )k

(iiht and '-;hape)

h

7) Axi a I

force at :ishi p sc tiun

₄

) wave

)r)file in tie stiN water c

(j ) _PLotogr nf the mo Lion by 16 m vie camera,

r

the

is useci tri . a

i . 3 Tés L Pr'ogiami S

Table 1.1 SLLws 1 ' t' .

ranc of

he 'ecd

is V/JT )

- J

¿t) (h/i

-l'i)).

s for

tiitrih!1Li )1 of'

rried

(nl t fl) t TI r t I. ..- L . fo r

te condi tiQfls at ' ich v na . t e :

after hodv of -t' . fted ; r ier

withoit c1tarìi n t ar

t,it' r:(1t . ' H ; COTd.

The i 1. va1ijs 1)1 measuii r [ements from

6) are reeordE'(i ty I e Leuents cloe Lro-:.

ntic oscil Iograh

and

tite 5 valueS frr the

art of iten (6) to

i tixi (7) are

recorded b another 6-eie;r:ents osci1iograh. ihe.exanJes of

r'corf of 12 eerens &

6 elements ar hWfl in i . 14 -1. 17.

iOT tP heflviur, item the measuring noint is not

e centre ofravity,

hut is shifted 130.6 mr to th

ft

fron ' C.G . ori the 3a;ne hei :ht accordi;; t

the arrarecnt

.01 tw

itc!iig-ard

iririgrecor

r.

The res1ts of

heav

this r(fl)rt are

t,tie vaines at tiis neasuring

r)Oi;)t, ¿ corrected to th C.C.

A

wave oit reCorPr, the results

of e ec tric

resist*uIcE t r are aiiì1y adopted, anc the zeuIts of

the s.lLort

recirder .re served as a rei erect'.

rhe T

shown In i .

1) tO t1Jf

)rt. of

se recri'rs reiatin

to nd&I are

The resi t'- H( wave record are corree tcu to the v1ue

at tc ói tion ul

the ..G. of t1e rnodl L'y calcu[atioii, aíd

rhase 1a o 1' iLe herid i rioweil t an

'the ship 'otíos to the

wave ar. calculated.

In lILS cise the clef ;.nition of te }.ase lug is a fol lows: 'rho de i v C)f tltp !:ase Of the max. .e'altie o f the he! moment

or motion aí'tr tIe ti r e when t-

wave crest pzisse ie1i1e

th( )hs(?..ia': wilh i y'.

. wave h

L eItin tiiLa '- . VL

I .e. tLC Fmi

( v<f-7I-- . t'ic :reate l) fIo

ftI1lIAI

t :eT . I

r . L t tAe 't r t a a L O

iab!p 1.2 sho t:ie ..eIs14?(1 U

r centre of grav t , nr. nt 1 r ti a tc.

its LIc)Ck1 in three c::.L Llu ;

óf e a' .

:d e \r _h t1R ( f) f th ' i i'' i ii '

These rneasrm(?11t

t') the tJo

'; e

C O fl 4) ()( a nt ead w i ìe.c we i c u t ft f a t. e a c

resi1 t- sre no t i rif IUPflCP(t by t

.

'rst PiS

. ) t L Ofl

') t)S . J I-_. 1 SL1O t wav( irul .

es .es'ired a t

- , 'b i)!! i S L )fl tes t i n s t i i y lì I f i ()fl

¡,. :. i -2 . i s hoy t h e ì - i s i r es n i ts o f h a

1 UT jflj aCCeIerat)fl rceasuríi

i:; tí

ìí- nrc))Ltl1k,rÌ

,* . %aves.

T s veiv }iar. 1() c( I rc L .t ' '

L

: ': r)f carrtage . t

.'

L! t (j Y) ;;oott c()rsrtflJ:

'ef)re tL

I ts of s:z::In u ii.

HC I ati8ie :t sv:1') L s t2- * - :

_i4

O!lh IP amr i t_ H1 e 1 i;t' i

.PH i reTLìI : tclï COt'ioi'r I

i L i I am tuti e _{( +} ( b'w

c1F, OzA acceI aion at ob'

inP of th& model.

i : ave hei ht f rtn ti'u

r i s ttic e ial (;!IAat.e(t : ''

eI*;tt

v)e? wave l( ) U Z/ _{//Lpp I Ìfl dejrees J,} ( r ' tÇ : ' . I down - (bow p)J r. _{¡;, r} ') i. ;,

1!ruJe o. (y '/gL ) . Th zero ( Lu re

fl!)

on th 5i1i state I,eÇc)re the ecL run an

sti H rtit

IS rLotled wit Le n1's

t i rn i ini s s i n i n Sì j C u fil i t i i L

: rin;.in i l ! re a i.o i

i i, . ìaH( f iIY(?S USL''

t1e corr'

: . eights

as for tie re1urenc.

. ..

uistri

eridiu; motuents in

;. at \r1 = ,

3.2, u.::

i»

L Iay (i. :'; arE tvcati..

t),j.íi-. tre I ut 1

diStrLt I)flS

bt the

sjaL.

\L I)rc

he axi al rorc s at the fuir

- »

tre me8s1red, SymLols tsei ere ir' is

F'1

: ur iit, Stan).

F1., : tinner side, not't.

F .

er siJe, 'tnrb.

4' _:

!'w(r :ide,

i,rt. j't

1tiis sin shows the LpnsL)M, '1 -'i.

(F, j-f- :')-fFJ-f-F1) i s the a' ìfl f t L

ixia1. forces at the intarits of

jx. ¡h

shown in iig. 2. 3. t -

.. .

5. d .: (, ('-)' 'rt H r1 Ttfl ore

trt )

ICI ,CIit. ( i iii rnûnen e iorjLk:ss ly L

are _{in the}

es is

;1 1*1I (3rPn ?*'d ree

r

= : 1.. r = , ont; th u f

lu

i. )uea([tr )f tLe s. (fl(1L ¡1 1(}; P fl L Ht M1 at :_. :. .V) shos th c-va! t

sreed.

Following symbols are used for comparison of the axial force

and moment.

F31 + F32 = FN upper axial force

F33 + F = FL

....

lower axial force

FM M/H force of bending moment

= The centre to centre height between the upper and lower gauge-bars,

thown tri Fir.

FN/FM, ±LJ for max. Hogging and Sagging state are

2.3.6 - 2.3.10.

Mean value of the FN/FM and FL/FM _,

_i.e.

_{( th F,:/F'M FN/FM),} must be 1.0. _{The scattering of the experliiental results are}

j

within the range of 1.0±0.1. The3e results show te error for

T/?8/ E

I 7

TEST POMME

)L/

*/L

_, A COIVD/J IC/V B (úívDì J /0/V C C7TVD/ T/O/V

-07S

/0

/2

/--

_/0

/2

_/0

(FOLLOW/N& IN 57/L « ,, ,,

'/30

" L k'7 TER

O

o

C

o

0

o

o

O

O

o

-0

o

o

O

O

739011

NI77d0.d-TI3S W3OOOt

'1NI0f S

(I)VÇV9VN) NV1- dXIHflJIk1 .LN1L :3flV3t'Y 31J1OH2S1IVi3Q

/

"-4-- _!

.

ivai c s # f

M Q7S!V\

'OPD?7*)J) ofl .1a5.u)rdcc

,.lçç &Mbl3* ivri e.,.. 1.0 C -2Jv.3*,u Nt.Lv O Çi . OiobV dOIS 173V ,o, -N#Ç 1I7V'7 ,çp - 1JJiÇ i4N ' oc, 4IHÇ #Wfl AH)I3 NldV W) iO 11 *b,0'I4 _..ol -1V7d 10 13 , L ' *000vH _Lt O101 307 SÇ1OiÇoO7 MÇ 1'7V07 (., _.) k _,o, ¡ 07e vo 0000S3O (oir) (oC0 yg --I t ,4 !O77 ç? !!T!O'/!!/!!!O!/!!! '/ ) 1N4i 3Jp wo 3Thd . \___f_ PIV1V

::

.-.-'. 1. liVid OWddV flV') tCLflO JlPod NS)PI 7 310H ONINjHt1 O Çf t .4p b 3AVld 1VNIOflJJONO7 .,I,ç r,. P .v £oOZ°Y 39 ¿o.,. t.?op.,, $ z 47

FI

J 3

MN EMEÎ T &

NA'ECTIOS

OF THE

TM/N

GauGEs FOR ¡4E5L!R/N

TH F 8 E ND/NG

'1Ofr7E' T5

& THE

AX/AL FoRcEs.

M2MENT Gí

FY

A FORCE G/:?L/ 5TAI'8. A A tIPPER .3/DE LOWER .3/DE LcIAJER 5/DE

NLIMBERIA'Q dF iRE (/?tJ(E 8/IRS:

G1q/k2E 817k /5 IÌVD/C/rrED BY THE tv118ER3 ò Th'O FIGURES.

HIG'f/Ek' /VL'MBER OF THEM MM/VS THE JO/NT NLI/1BER /V/IMED.( ¿2. 3. IN OI'DE

rRCY i37üJ)

1P(4"LR /X ì'arc ji'/E/IA/S TI/E ,°OSIT/QTV OF THE 8/IRS /7T THE JO/tTC /75 I78O1)E

F/(rìL!i?ES).

I

I:76T I

' 4 THE

SCHEMATIC 4RRANGE/'IENT OF ThE APPAR/1 TuS

¿lA/IT ¡N ?flnt

I. IN HE/ID SEAS

SR/P frVfL

OF R/?VrJY

.$HORT CíL//T TYPE WtIVE R&'ORDER

ELECrRIC RES/gT/ThICE -y wiv RECORDER

(Fí>'ED 7V THE CARRIAGE)

¿F/XEfl 1D THE CARRíAG)

RECT/ON OF Rt1N4J/N

+

WAVE EMOIJ,rrER /VI4RKER

,(rixED TO THE CARRI.4eE)

-

p.-1-304

WAVE ENCtILJ/VTER /44RXEI?

(F7xE0 TO 77iE CARRI4E)

2. ¡iv FOLLbWING- WAVES

SHIP ,412'DEL

. .

¡S

PH TO I b

FRAMING- o 77-/E WNG. S /RENGTH GIRDER

-. IlI,ttltIIIll.IIIIIIIIc IA I J Li ilIIIII

PHO TO I ' 7 /ISSEII4BL 1N6 OF THE 8LÛKS

RHO TO. I ' 8 W4 TER- T/6HT I/J/88ER S//FE T

PHOTO.

/c/

CAL/8RAT1ONS FORCMENTFÛRCE GALlEES

PHO TO. I I O MEASUREMENTS OF THE MOMEN To F INERTIA

d CENTEo GR4VITY OF 771E SHiP MODEL

PHOTO I ' I I MEASUREMENTS OF THE MOMENTOF 1NER77I

¿ CEJYTRE OF GR'l V/TY a "NO. I BLOCK"

r :, cJoI13c1 NIHJi(d VifliVN

' S1W91QSVd/ 3H1 10

ThOJ3I I L: t r j1

'

LAd 1k s.... iai.

hual4Ii

II I'

'Iii

. r'-z7-c'6/ UO77''2CD () 4 z;' -z' -Ob/ uawpio: i b') C

O77IO N-Z! ict .JO .LN3AJ3èIflSV3f4

C ZN) 3sep . 441iI .. iiTTC) ' ,f 4II ;#ki èL. *.*, A:

È»

'":r

.' ,vv w .p., -(cav3y O17/zVZN) dj, J 1N3AIpSV_ i t t t L/-Z10%I 'l7PUW (g) V,,» Zi-Z/-O'bI ?wzz'zco (b') caJoJ3

Z) dj j3fl'3'j

t t

-

u

__um*su

F-1G. / /3 1'ECORV5 OF ThE HEA5UEMENT5

FOR TIlE NATLJfA L HEA V1N PERIOD.

(8)COzdLt:c7t 1'c1ì

-I

w

f

(N-12 OSCILLO cXD)

MEASUREPNT OF

1H ''

GCiLW CO'6

-4-i.-(8) CCfldLLC ÑO-/2-I9 4;1UII s d1Ibsi flhIIIIItiiii, uuIIaj$ !J

---, e t. :M*.m*wse*w....w.w.w.

.

I (N-12 OSCILLO ECOD)

-i.'. I '' I I

i

-u/! Lodd tAJ C...dto* )L-° V/j;;_c2ì4 W! JU4 (d-l2-2) Fu//La,4 z/_.,x :_-.024 £M . FIJI, Lo4a f (osxLt,.* usqj (-i2-J) . j(_.Lw 4J

,'

w. '?' Vjl i, 4. , _1,, iq1

!

P 44

J4.

,1

Jh

FIG

)I1-RZCORDS °c BENDINNOI'1ENT tIEMSUR'EMENT

/=/so

zo

O7/

1NWJflSVJ 1NWOW NlQN

:i'O s'c:Th10J3?! I

i

,th-7 z) (WI PW7 //J

\*

\*

I

_/ '/

A

- --(.-_-) , ?_,-w-X (Vi II:J L,ø_ o-%

t;,,.

T7'" '?' - k '

-I F i j: ' l ' 1 '

-p i t

fN/N/ 'J

\J

'

E*PNO 41U4 (IqMI2-) LPSJ --r --FuLL L.a. (A) C.Äat,.a pzZ5

,.,

'42:A:__-/\:/'v/\ft, "\:/\;/\,

(S\\f

4

,d

f'uP\ 4\

\

_4\ /4I\

i\

Ff

/i/

1?ECORDS OF FORCE MEASUREMENT

/Lp = j/50 022 / FuLL L& (A) Coitoi )f,,.l° #í_...

F1 I 17 RECORDS OF FORCE MEA5LJfREMENT /LpY3O V//LpO22

PHOTO.

2II

WIVE

PPOF/LES I/V STILL /ATER

M. M 4 2 x P /208

( T- 2 TANKER)

S6IJARE STAT/CA/S APART WAILR IJWES APA/'T. .5OOOO 44.44 I-pp a D a' BL. = $,000 = - 3297 '80

PHOTO. ai

.

//AVE

PROF/LES /N STIL L

A J £

/42xP/2C8

T-2TANKER)

EXP N 4x927 7i =0078 : EXP. N 4928

//L

PHOTO. ¿''.3

V/A VE

PROFIL ES I

ST! L L

I FR

/

/42 P 1208

(T-2 TANKEP)

2fr! EX'P /V 48930 0/78 ---_ -______ J st! ' &

?dï

-a EXP N2

/

PHOTO. 2J

WAVE

PROF/LES /N STILL

ATEP

M /442 x ,Q /208

( T-2 T4NKER)

EXP (V2 z7S93 I - O2/

-

I-EXP N2 f19932 0252

PF/OTO. J' WA VE

PC/LES 'N STILL

/ TER

Id 2

/208

( T 2 TANKER)

EXP NP 432 =O2&5

-'

:---r

/ 'L Ek'P N2 if-8934 ''%9L,

1.5

1.0

o. 5 Y V

FIG 2 I

NÛN - DIMENSIONÌ4L HEA V/N6 4WPL I TIlDE

fiì4 VE WAS MEASL/RED / T SS. 1 7&9

z = DÛ/IBL E /?MPL I TIlDE OF HE/I VE

- = W4!I/E HE/C/IT ERLOM TROLIH TO Ck'EST

- -

_7__ .

i

:

-Io.q

-A D

-o J o 01 + -1-V . W4VES ) )>/Lfti 0(FLûW/N , SC/?LE5 FOR o -t' o4 f 7e 'V

I

=1/ WI4VES D Y50 EJ 0.2 Q.3

/LFF

L12 I t1., O.15_ I i

li

12 1.0 o.q 11.0 11.1 1.25 IOd 1.q 1.0 1.5 I 2 . t. Ii U

I

3QQO

2000

4) _{:- ( - '- ) -} X_{D9LIBLE 4A4PL I TLIDE ÛF PITCH IN DE 6' REES}

q - ¡4/41/E _{HE/67-/T FkÛM TRO/J6H TO CREST}

00

F/

2 I ' 7 P/ TCH/NG 4MPL / PUDE .-. __-.,

--

-_Ç___-_ _,-

,-L'

-,.-

-L

'-'

I

,

I

1000

L

\

I

o 0.1 D D o

oç'

o _;7O ,\ft _o4,p A _.'

'

o

/

-

/I;D, o :7__' V

-H

o .2 o o -s--L'I14'4/ -o.

Dp

o 03 YLft 1.q 11.1 ,12 ,J4 _{0.0_15} Io. 1.q 11.0 11.1 12 ₁₀ Io. 1o.q ,o 1.25 10.b (o. _{to.q 15} _v_/L-I.O(- (R9LJW/N6 _{o h 0.4} w,ivís J I I .

SC/LES

FÛR

4

(

1.0 -p:

0.75

05

o

FIG 2'Ì . NÛN-D/MENS/ÛIY4L ACCEP4T/ÚNS IN WAVES =

c)

c/F = L/ERT!C4L 4Cc ME4SLIRED /T SS 9'// o 7 ií ERO/i'! S.L.

cZA ' ,, ,.. 4 . d??, ¿27D

oz

/3 T41(EN -I- / ST/LL T4TE

o. i o.2. 03 © 4/qx,

-s

(

25 © o 1

----

'J : o -o-__ (!) . .I. '@o__±

_-

_-.----____

--

® - .

--+ - - -

--:' T

_---

_ MIN

-1-__

_± 075 - - - I ..-.---- +____ -r-.

- -. .

-.__'___-_{- -S}© -..___ o

-a

o

'

---

--j

----?soo o

c%

r ,0 o1

--

-

=;;;;::

:í-:

ç.

R - _ -_ M/N.

;!

±

---. .

---T

..

. :) -%.-.. L / s o ®'

.----

. o

I

_j . 1.0 ®®'-2g © L I I I I. S t. 25 1.0 0.75 0.5 f. 25

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