4 - Memorial University of Newfoundland DAI

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[9] 0. Loland A.C. Mnekenaie and R.D. Be@ "llltyrily, Maniltwhg ol Fixed Sldl Offshorc Oil Platforms.' [IS I/RIN, Jot8,l Co8tlrwnrr. Me~surements in the Offshore Industry, Ediebergl~, Seple~nbcr 1975. [lo) R D Begb, "Analysis for Deep North Sen Installdio!!," Pclmlr~a~ Enpincer, 0ctob.r 1971, pp. IO&lIG. [ll] R.D. Be g and A.C. Mnekkende, "Mottiloring al OLl>oro Stn~cttmws Using vi%mtion Analyaia," Slruclurnl &lo.loailoring Scminnr on Sl~~urlurnl hlrgrily Monitoring 01 Oflabon Slrncluns, Clasgoa, April 1078. pp. 1-7. [12] G.P.D. Lock and A.W. Jonos. "The Dclation 01 Failurn ion OIfrBnn. Structurrr by Vibration Annlysis. A Pcrrsihility Study" Inlnpmlnliua o/Camplez Signob Jmm Mcchonicnl Syalama 4nzporirr:z. landon, I!l7G, pp. 31-35. 1131 L.R. Wooton "Use of Vibration Monitoring on Ollshore Stntrtt~n.*," Inslilulian a) Civil Engineers, London, Procecrlings 01 Co!~lcro#~c- don, bclobec 1.1-27, 1978, p. 169. 115) J.K. Vandiver "Detection of Struetuml Wilure on Fix4 I'lallorma Iby Measurement bl Dynamic Response," Sevealh Annvnl Ofilrotr lidnnl- ogy Confennce, Houston, Texas, Paper Number 2267, May 6-8, 1!)76, pp. 243-251. [16) RF. Busby, "Underwater Inspcction/Tcstin~Monito~i~~g or Ofihorr Structures," Ocean Engineering, Volume 6, I'crgnmon I'rcns I.td., Britain, 1979, pp. 456-411. [I?] S. Rubin "Mode ~xtracticn fmm ~mhient vibration or at, oIrxllorc: ~latform,'" ASCE Spring Convention end Edtibil, Hostar~. April 2-6, 1979. [la] J.K. Vandiver and R.B. Campbell "Ealimnlio!~ Of Nntn~ral I?rc
[21] .I.K. Vandiver, "Structo~ral Damrage Delslian by Mesrurement of Dynamic Respunsc ' Spring Meeling/STAR Spmpasium, Paper No. T4, Ssn Francisco, ~alhrnia, May 25-27, 1977, pp. 173-181. 1221 J.K. Vnndiver 'The ERoct of Liquid Storage Tanks on the Dynamic Response of bffahore Platfarms," Journal of Pelmlcum Technology, October 1979, pp. 91-96. 1231 D.M. D. gan, E.R. Wallace and S.R. Caldwell "M-ured and Ple- dieted %Fational Bellavior of Gulf of Mexi& Platforms," TwefJth Annuol Ofihoe Technology Conference, Papec No. OTC 3864, Houaton, Texas, May 5-8, 1980, pp. 91-96. ['hi] D.M. Duggan E.H. Wallace and S.R. Caldwell "Measured Vibrational P~haviar of 2 Gttlf of Mexim Platform," ~hi:trenlh Annuol Ofahare lecl~nnlogy Confelcnrc, Paper No. OTC 4137. Houslon, Texx, May 4- 7. 1980. pp. 199-203. [25] R.B. Campbell and J.K. Vnndiver "The Estimation of Natural Frequencies and Dampin Ralios of 0kshore Structure " Ttvelfih Annuol Oflsbon Technology &rt/rrmce, Paper No. OTC 3~6i, Houslon, Texas, May 5-8, 1980, pp. 53-57. 1261 R.N. Coppalino and S. Rubin "Detectabili;~ of Structvral Failure in Offshorr Platforms by ~ibretldn Monitoring Twelfth Annuol Ofihom Technology Confeenee, Papep No. OTC 3865: Houston, Texas, May 5-8, 1980, pp. 101-106. 1271 P. Lcpcd, M. Chby, J.Y. Heyand P. Marzul, -Vibration Detection Applid to Offshore Platforms TroelJfh Annuol Ofihon Technology Conjclcnee, Papcr No. OTC 6918, Houston, Texas, May 5-8, 1980, pp. 627-630. 1281 B.G. Burke, C. Stmdwnrajan and F.M. Lafaie "Characterization of Ambient Vibrdion Data by Response Shape hctom," Thirteenth Annxal Ofshon Tednology ConJemncr, Paper No. OTC 4137, Hour- lo". Texas, May 4-7, 1981, pp. 199-203. 1291 B.G. Burke and N.R. Smdim, "Analysis of Ambient Vibration Data by Multiplc Shape Vectors'' Wurleenlh Annval Ofihorr Technology Can- /~~?ZEE, Paper OTC 42.94, Houston, Texas, May 3-6,1982, pp. 625-635. I301 11. Crol~~l and P. Leper1 "D~nagcDeteelion Monitoring Method for Ollshorr Platforms is pieid-~ested," Oil and Ooa Journal, February 22, 1982. pp. 94-103. [311 M.J. Bri and J.K. Vmdiver "Multichannel Maximum Entropy ~etlnodo%ectral Analysis ~ pplhd to Offshore Platforms " Fourteenth Annual Offahom Technology ConJemner, Paper No. OTC 4i86, Houston, Tcxns, May 3-6, 1962, pp. 647-652. 266
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 and 28:
D.ll DynamicMode # I (Intact Model)
Page 29 and 30:
List of Tables 4.1 Symbols, Units a
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: References K I'o,lnt~n~. 'A Sludy o
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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