4 - Memorial University of Newfoundland DAI

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D.21 Ilesulla lmm Acccloromeler A1 due to an Impact Initialed at 116 (Damaged Strtxcturc: Members70 and 68 Severed at Node 18). ................................ ,310 D.28 Results fmm Accelcmmetm A2 due to an Impact Ioiliatd at 116 (Damaged Slntrl~m-: Members 70 and 68 Severed al Node 18). ................................ ,311 D.29 Results from Acurleromcter A3 due to en Impact Initiated at 118 (Damaged Structure: Membera 10 end 68 Severed at Node 18). ................................ ,312 D.30 Rcsulls from Accclcmmetm A4 due to an Impact Initialed at 116 (Dunaged Structure: MomberslO and68 Severed at Node 18). ................................ ,313
List <strong>of</strong> Tables 4.1 Symbols, Units and Dimensionsfor Vnri~blca Used in Modcllisg. 04 4.2 Pmtotype Strudurd Data (Original Struclarc). ........ 78 4.3 Pmlotypc Struciurnl Data (Modified Stn~clare). ........ 711 4.4 Model Struclural Dala (Bascd on ModiRcd I'mtalype Stnwl!mn.) XI 4.5 Relent Material Pmpertica lor ABS Plnstic. ......... 81 7.1 Natural Frequency Comparison <strong>of</strong> tllo 3-0 Model nt~l I'm- totype (kults Obtained lrom thc h Vibration Cosnpslcr Analyses). ............................. 142 7.2 Natural Requency Cornparison ol tho 3-D ntncl Stirk Model (Results obtained fmm the Pm Vibration Am~alyxs). ..... 14:s 7.3 PcrcentageChan~os in Natural Ftqaoneinwl~on Ccrlnis rncmthers were Inactivated (Pmtolype). ................ 150 7.4 PemntqeCbsngca in Natural ficqtmneic~ wLo8 Curlal~ morn- hers were Inactivated (Model). .................. 151 7.5 X-direction Results Fmm h e Vibration In.Air 'l'csla (Using tbc Levenberb-Marquardt and Pinilc DiLleocc .lxobinr~). .. 181 7.6 Y-direction Results Rom Prac Vihralion in-Air 'bls (Using the LvenberpMarquardt and Finilc Dillcmna Jacoirias). .. 181
Page 5 and 6: NOTICE The quallty of this microfor
Page 7 and 8: I*I Et"" :lbL="*"" k.. bpilmsa7d Di
Page 9 and 10: Acknowledgements I should like lo t
Page 11 and 12: Abstract As a result of the increas
Page 13 and 14: Contents List of Figures xii List o
Page 15 and 16: 4.6.3 Fnbrieatiox of tllc Rcduced M
Page 17 and 18: A Selected Algoilthma 278 A.1 Diago
Page 19 and 20: 4.5 Member Configuration at level #
Page 21 and 22: 7.21 Dynamic Mode # 6 (Intact Model
Page 23 and 24: 7.49 Typical Measured lnput Wnve Sp
Page 25 and 26: 7.66 hulls fmm Accelerometer A2 due
Page 27: D.ll DynamicMode # I (Intact Model)
Page 31 and 32: 8.9 Pacent Changes in Resonant Frrq
Page 33 and 34: List of Symbols d(k) .i(k) A A(L1 1
Page 35 and 36: autosp~trni density of r(t) cms-spe
Page 37 and 38: 0,1,2
Page 39 and 40: [@I a Pu. P. P:,," P.. o2(k) instan
Page 41 and 42: een recorded, then it is beneficial
Page 43: Associated with every vibration mod
Page 46 and 47: Such s model is called a dynamicall
Page 48 and 49: presenlcd. Chapter 3 contains the t
Page 50 and 51: al frequcncic. occurred when member
Page 52 and 53: detwM from the data roeorded (later
Page 54 and 55: y Duggan d a!. [a]. This study inve
Page 56 and 57: ~~lidity of the results war rompsro
Page 58 and 59: nic~~~aan:immcdiateiyuseful, they a
Page 60 and 61: tlncayatem hehavior oftrusswork pla
Page 62 and 63: Chapter 3 Theoretical Modelling Tll
Page 64 and 65: 3.2 Wave Theories Works by earlier
Page 66 and 67: F;-RY% WAVE THEORY) 1/20 I "w/Lw DE
Page 68 and 69: DIRECTION OF WAVE PROPAGATION FIG.
Page 70 and 71: liero, d and ita wlocity component
Page 72 and 73: and and a+ "=-. OY = wA~inl~IW(1+ s
Page 74 and 75: FIG.3.4 ARBITRARILY ORIENTED CYLIND
Page 76 and 77: ~i n long c mtd wave is being conai
Page 78 and 79:
inrther. Ultimately, the resulting
Page 80 and 81:
equcncia and mode shapes, equalion
Page 82 and 83:
Toestablish tho relationship betwee
Page 84 and 85:
Furthermore, from equation (3.56),
Page 86 and 87:
lG.3.6 SIMULATED 3-D AND STICK MODE
Page 88:
1. priam&tic heam members, 5. sir d
Page 92 and 93:
The equation of motion for each ele
Page 94:
From tho ~tatic dispiaeemont muita,
Page 97 and 98:
instance, the non-dimensional equal
Page 99 and 100:
functional relationship relating th
Page 101 and 102:
whcre F, 't iinstantanmua force at
Page 103 and 104:
Table 4.1 Symbols, Unit. and Dimens
Page 105 and 106:
thc Buckinghm r-Thmrem (i.c., I2 te
Page 107 and 108:
That is, equations (4.28) and (4.29
Page 109 and 110:
C. Ilence, if the dynamic amplifica
Page 111 and 112:
where (2) is the general gmmdric or
Page 113 and 114:
the prolotype. Damping is dcfincd b
Page 115 and 116:
2 LEVEL # 7 1 28956DO NOTE: ALL DIM
Page 117:
Mataial= Structural Steel, E = 206.
Page 122 and 123:
LEVEL C6 NOTE: ALL DlMENStONS IN m
Page 124 and 125:
Table 4.5 Relevant Materiel Propert
Page 128 and 129:
FlG.4.9 COMPLETED STRUCTURE. 89
Page 132 and 133:
Since the de& sertioo of the struct
Page 134 and 135:
% FINITE ELEMENT ANALYSIS (COMPUTER
Page 136 and 137:
3 53 I CONTROL RM SECTION A-D. MEZZ
Page 139 and 140:
I I SERVO CONTROLLER MODEL 408.1% j
Page 141 and 142:
LEGEND FI B F2 FREE VlBllTlDN INITI
Page 144 and 145:
5.1.4 Response Circuit Data acquisi
Page 146 and 147:
I ~T.UG~U~E LEGEND: DYIIYT I., 10 A
Page 150 and 151:
the basis upon which the irregular
Page 152 and 153:
then manipulated by the computer ro
Page 154 and 155:
,.. G STRUCTURE IN STILL WATER STRU
Page 156 and 157:
dter every set of hen wave excitati
Page 158 and 159:
To gather spectral information fmm
Page 160 and 161:
is the timelag between silrnplev~l~
Page 162 and 163:
ics, with a lew notable exceptions,
Page 164 and 165:
If bath aides of the dove cguntion
Page 166 and 167:
Conversely, r(1) can be estimated b
Page 168 and 169:
quires ahout N(M + 1) + 9Y1 arithme
Page 170 and 171:
So equation (6.18) become: I, i = C
Page 172 and 173:
At each resonant frequency, the hdl
Page 176:
6.5 Impact Testing Impact testa wer
Page 179 and 180:
Chapter 7 Theoretical and Experimen
Page 181 and 182:
Table 7.1 Natural Wequeney Comparis
Page 188:
Therefore, with the natural freluen
Page 199:
Pi7 Be: kD! SF:& iid id . -5 i#@ Ba
Page 204:
(i.o., at noder 6, 12, 18, 22 and 2
Page 208:
tirne dntn;lis reprcsez~lnlioti of
Page 214:
-CUI~IW~~~ anstmr 9~1sn-mmu3n DL um
Page 218:
the posilivc and nogntivr peaks. Re
Page 224 and 225:
Table 7.7 X-Direction Results From
Page 226:
2 GEhEnnlEO FRDM TdE WrllTE hOISE l
Page 230 and 231:
FIG. 7.53 MEASURED INPUT WRVE FROM
Page 236:
'IUnU133dS 3SIR1 31IHI 9NISn--91 30
Page 244 and 245:
Table 7.9 MEM Damping Estimates fro
Page 246:
7.2.3 Impact Test Results In Chsptc
Page 252 and 253:
(K 01 0 01- OZ- DE- 0,- OBI (KI 09
Page 257 and 258:
Chapter 8 Discussion of Results In
Page 260 and 261:
of rnemhcr removal can he visually
Page 263 and 264:
emoved is a cancellation offecl, an
Page 265 and 266:
Force Variation Along the Jacket. P
Page 267:
fi~t on the lower rrequency end of
Page 271 and 272:
pond approximately to thasc which c
Page 273 and 274:
'Ikble 8.1 Measured Resonant Rsquen
Page 275 and 276:
Table 8.6 Measured Resonant Wequenc
Page 277 and 278:
After a close look at the measured
Page 279 and 280:
Table 8.11 Percent Changes in Reson
Page 281 and 282:
Table 8.16 Percent Changes in Reson
Page 283:
apprmiably. Since the tmnsa of the
Page 286 and 287:
'*~+12 \5 \8 h4 h7 $0 FREOUENCY IHz
Page 288 and 289:
8.2.4 Impact Test Results 'l'incobj
Page 293 and 294:
I able 8.20 Comparison of the Reson
Page 295 and 296:
'Phc invalidity of thc lumped mass
Page 297 and 298:
Chapter 9 Concluding Remarks and Re
Page 299 and 300:
general agreement. 5. An investigat
Page 301 and 302:
mode, br example, might have been e
Page 303 and 304:
References K I'o,lnt~n~. 'A Sludy o
Page 305 and 306:
[21] .I.K. Vandiver, "Structo~ral D
Page 307 and 308:
1431 D.J. Kartewcg and G. d-Vria "O
Page 309 and 310:
1671 I..S. Marplo, "A NCW Autorepes
Page 311 and 312:
(111 J. Zhou "Ocean Wave Simulation
Page 313 and 314:
[Ill M.C. Ilallsm, N.J. Hcaf and L.
Page 315 and 316:
Appendix A Selected Algorithms Tllr
Page 317 and 318:
- M = the total mass of the slructu
Page 319 and 320:
Suhrtituting qualion (A.5) in equal
Page 321 and 322:
..3 Longuet-Higgins and Cokelet Smo
Page 323 and 324:
Appendix B Sample Calculations Typi
Page 325 and 326:
The dcnsity of ABS plsstic (p.,,) i
Page 327:
C.l Calibration and Instrumentation
Page 330:
D.l Mode Shape (Members 70 and 68 R
Page 340 and 341:
D.2 Results for an Impact Initiated
Page 343:
i W 4 P Li I 2: 5: E B '5 2- d :" i
Page 347:
oa m 01 o or- QZ- oe- om Q Z ~ oo a
Page 353:
D.3 MEM Damping Estimates for the D
Page 357:
Table D.4 MEM Damping Estimate. fro
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4 - Memorial University of Newfoundland DAI

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