SARAN - KESIMPULAN DAN SARAN - ANALISIS KEANDALAN SCANTLING SUPPORT STRUCTURE SYSTEM GAS PROCES

BAB V KESIMPULAN DAN SARAN

5.2. SARAN

Saran yang dapat diberikan dari kajian Tugas Akhir ini adalah:

1. Daerah paling kritis pada kondisi ekstrem terdapat pada struktur penegar support structure di atas geladak, sehingga daerah tersebut perlu mendapatkan perhatian lebih pada saat inspeksi.

2. Untuk kajian tugas akhir selanjutnya, struktur module juga perlu dimodelkan sehingga didapatkan hasil lebih akurat. Sehingga dapat dibandingkan hasil dari pendekatan pemodelan secara lokal pada dengan pemodelan keseluruhan.

DAFTAR PUSTAKA

ABS Rules For Building And Classing Mobile Offshore Drilling Units. 2001. Part 3 – Hull Construction & Equipment. Houston.

ABS. 2005. Commentary on the Guide – Buckling and Ultinmate Strength Assessment for Offshore Structures. Houston.

ABS. 2004. Guide For - Buckling and Ultinmate Strength Assessment for Offshore Structures. Houston

Al-Obaid, Y. F. 1994. Automated Analysis of Topside Platform Hatch Covers Subject To Drill Collar Impact. PAAET. Kuwait.

Ang, H. S. dan Tang, W. H. 1985. Probability Concepts In Engineering Planning And Design. New York : John Wiley.

Ayyub, B.M. dan Gilberto F.M.S. 2001. Reliability-Based Methodology for Life Prediction of Ship Structures.

Baker M.J. dan Wyatt,T.A, 1979. ”Methods of Reliability Analysis for Jacket Platform”. Journal of Behaviour of Offshore Structures. London.

Battacharyya, R. 1978. Dynamic of Marine Vehicles. John Wiley and Sons Inc., New York.

Barltrop, N. dan Okan, N., 200. FPSO Bow Damage in steep waves. John Wiley and Sons Inc. New York.

Brockenbrough, R. L. dan Merrit, F.S. 1978. Structural Steel Designer’s Handbook. McGraw-Hill Inc., Pennsylvania.

Brynjoifsson, S and Leonard, J. W. 1987. Response of Guyed Offshore Towers to Stochastic Loads: Time Domain vs. Frequency Domain. Oregon State University. USA

Bunce, J. W. 1977. Analysis of The Interaction Between The Module Structures and The Deck of an Offshore Oil Production Platform.Pergamon Ltd., Great Britain.

Cameron, J et all. 1997. Ultimate Strength Analysis of Inland Tank Barges. USCG Marine Safety Center.

Chakrabarti S. K. 2005. Handbook of Offshore Engineering Volume I. Offshore Structure Analysis Inc. Planfield, Illinois, USA.

Das I. A. Khan, P. K. and Parmentier G. 2006, Ultimate Strength and Reliability Analysis of a VLCC, 3^rd International ASRANet Colloquium, Glasgow. Djatmiko, E. B., 2003, Fatigue Analysis, Kursus Singkat Offshore Structure

Design And Modelling, Surabaya.

DnV Recommended Practice C205. 2007. Enviromental Loads and Enviromental Conditions. Norway.

Ewing, J. A. 1990. Wind, Wave and Current Data for the Design of Ships and Offshore Structures. Elsevier Science Publishers Ltd. England.

Gregersen, E. M and Hagen O. 1989. Uncertain in Data For The Offshore Environment. A.S Veritas Research. Norway.

Hagemeijer, P.M. 1990. Estimation of Drag/Inertia Parameters Using Time-Domain Simulations and The Prediction of Extreme Response. Shell Exploratie en Produktie Labolatorium. Nehterlands.

http://noladishu.blogspot.com/2007/06/mars-oil-and-engineering.html http://www.jrayMcDermott.com/projects/Belanak-FPSO__90.asp

ISOSC. 2006. Ultimate strength. Nagasaki. Japan.

Martins, M.R. 2007. Inertial and hydrodynamic inertial loads on floating units. University of Sao Paulo. Sao Paulo

McDermott, J. 2004. Belanak Natuna FPSO Technical Data. Jray McDermott. Indonesia.

Murdjito, 2009. Presentasi Mata Kuliah Olah Gerak Bangunan Apung. Teknik Kelautan ITS. Surabaya.

Naess, A., 1985, Fatigue Handbook Offshore Steel Structure, Trondheim. Nguyen, T. D. 2009. Scantling Optimazition Ropax Ship. University of Liege. O’Brein, D. P et all. 1993. Recent Developments in Offshore Rig/Platform

Evacuation. Memorial University of Newfoundland. Canada.

Palmer, A. C. 1997. Breakup of Firewall Between The B and C Modules of Piper Alpha Platform-I. Analysis by Hand Calculation. University of Cambridge. UK.

Philips, Conoco. 2002. Belanak Special Structures Module Supports Detail of Support Type 1. Conoco Indonesia Inc. Ltd., Indonesia.

93 Rosati, L et all. 2007. Enchanced Solution Strategis for Ultimate Strength Analysis of Composite Steel-Concentrate Sections Subject to Axial Force and Biaxial Bending. University di Napoli Faderico II. Italy.

Rosyid, D.M. 2007. Pengantar Rekayasa Keandalan. Airlangga University Press. Surabaya.

Shetty, N. K et all. 1998. Fire Safety Assessment and Optimal Design of Passive Fire Protection for Offshore Structures. Elsevier Science Limited. Northern Ireland.

UKOOA. 2002. Buckling and Ultinmate Strength Assessment for Offshore Structures. Glasgow.

Wahyudi, Y. A. N., 2009, Analisis Fatigue dengan Spectral Analysis pada Crane Pedestal Floating Production Storage and Offloading (FPSO) Belanak. Jurusan Teknik Kelautan ITS. Surabaya.

Windergen, K V. 1994. Course and Strength of Accidental Explosions on Offshore Installations. Christian Michelsen Research. Norway.

Zachary, S et all. 1998. Multivariance Extrapolation in the Offshore Environment. Elsevier Science Ltd. England.

95 FPSO BELANAK

97 &dimen -save -dimen meters k-nts

&device -cecho y -mecho n -prim screen -secondary device &title Belanak

&set demo = .false. &MACRO CETAK NAMES &SELEC :N -SEL %NAMES &IF %DEMO &THEN

&DEVICE -PRIMARY SCREEN

&SUBTITLE %SUBT TAMPAK ISOMETRI &PICT ISO -parent :N

&LOCAL DUM = &GET(YES/NO )

&IF &STRING(MATCH %DUM% YES) &THEN &ENDIF

&SUBTITLE %SUBT TAMPAK ATAS &PICT TOP

&LOCAL DUM = &GET(YES/NO )

&IF &STRING(MATCH %DUM% YES) &THEN &ENDIF

&SUBTITLE %SUBT TAMPAK DEPAN &PICT BOW

&LOCAL DUM = &GET(YES/NO )

&IF &STRING(MATCH %DUM% YES) &THEN &ENDIF

&SUBTITLE %SUBT TAMPAK SAMPING &PICT STARB

&LOCAL DUM = &GET(YES/NO )

&IF &STRING(MATCH %DUM% YES) &THEN &ENDIF

&ELSE

&DEVICE -PRIMARY DEVICE

&SUBTITLE %SUBT TAMPAK ISOMETRI &PICT ISO -parent :N

&SUBTITLE %SUBT TAMPAK ATAS &PICT TOP

&SUBTITLE %SUBT TAMPAK DEPAN &PICT BOW

&SUBTITLE %SUBT TAMPAK SAMPING &PICT STARB &ENDIF &ENDMACRO $ &surface &set lft = 1. &set bft = 1. &set hft = 1.

block Belanak -location 0 0 0

PLANE 0.000*%lft% -cart 0.000*%bft% 27.000*%hft% \ 4.750*%bft% 27.000*%hft% \ 14.000*%bft% 26.619*%hft% PLANE 4.833*%lft% -cart 0.000*%bft% 18.000*%hft% \ 14.000*%bft% 18.000*%hft% \ 18.603*%bft% 26.429*%hft% PLANE 14.500*%lft% -cart 0.000*%bft% 0.000*%hft% \ 14.000*%bft% 0.000*%hft% \ 28.228*%bft% 26.032*%hft% PLANE 15.287*%lft% -cart 0.000*%bft% 0.000*%hft% \ 14.801*%bft% 0.000*%hft% \ 29.000*%bft% 26.000*%hft% PLANE 29.250*%lft% 75.000*%lft% 142.500*%lft% 210.000*%lft% 255.750*%lft% \ -cart 0.000*%bft% 0.000*%hft% \ 26.470*%bft% 0.000*%hft% \ 27.125*%bft% 0.086*%hft% \ 27.735*%bft% 0.339*%hft% \ 28.259*%bft% 0.741*%hft% \ 28.661*%bft% 1.265*%hft% \ 28.914*%bft% 1.875*%hft% \ 29.000*%bft% 2.530*%hft% \ 29.000*%bft% 26.000*%hft% PLANE 269.713*%lft% -cart 0.000*%bft% 0.000*%hft% \ 14.801*%bft% 0.000*%hft% \ 29.000*%bft% 26.000*%hft% PLANE 270.500*%lft% -cart 0.000*%bft% 0.000*%hft% \

98 14.000*%bft% 0.000*%hft% \ 28.228*%bft% 26.032*%hft% PLANE 280.167*%lft% -cart 0.000*%bft% 18.000*%hft% \ 14.000*%bft% 18.000*%hft% \ 18.603*%bft% 26.429*%hft% PLANE 285.000*%lft% -cart 0.000*%bft% 27.000*%hft% \ 4.750*%bft% 27.000*%hft% \ 14.000*%bft% 26.619*%hft% end

&set subt = Belanak cetak Belanak rename Belanak

emit Belanak -body Belanak

emit Belanak -piece ' -diftyp 3ddif' &dimen -remember end &finish $@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@$ $ $

$ Response Amplitude Operators (RAOs) $ $ $ $@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@$ $***************************************************************** *** set basic parameter

&DIMEN -DIMEN METERS M-TONS

&DEVICE -OECHO NO -QUERY NO -PRIMARY DEVICE -AUXIN FPSO.Belanak.dat

&TITLE Response Amplitude Operators and Wave Drift Force $

$***************************************************************** *** Read model

&set arah = 180 &set iterasi = 1e3 $

INMODEL $

$***************************************************************** *** set initial condition

$ &INSTATE -CONDITION 16.2 $ $***************************************************************** *** plot model $ &PLTMODEL VESSEL PIC ISO PIC SIDE PIC TOP END $ $***************************************************************** *** compute weight for cond.

&WEIGHT -COMPUTE FPSO 12.96 0.32*38 0.29*285 0.29*285

$ $

&EQUI -iter_max %iterasi% &status b_w hard

&status F_connect &status force

&dcptime Time for Equilibrium $ $********************************************* DEFINE MOORING LINES $ MEDIT *MLA 270 29 27 *MLB 270 -29 27 *MLC 15 29 27 *MLD 15 -29 27

~CHAIN ALINE 90 DEP 90 LEN 770.0 BUOY 0 WTPL 0.237 -B_TENSION 690.00

CONNECTOR 1 -ANC 45 50 ~CHAIN *MLA CONNECTOR 2 -ANC 60 50 ~CHAIN *MLA CONNECTOR 3 -ANC 75 50 ~CHAIN *MLA CONNECTOR 4 -ANC -45 50 ~CHAIN *MLB CONNECTOR 5 -ANC -60 50 ~CHAIN *MLB CONNECTOR 6 -ANC -75 50 ~CHAIN *MLB CONNECTOR 7 -ANC 105 50 ~CHAIN *MLC CONNECTOR 8 -ANC 120 50 ~CHAIN *MLC CONNECTOR 9 -ANC 135 50 ~CHAIN *MLC CONNECTOR 10 -ANC 150 50 ~CHAIN *MLC CONNECTOR 11 -ANC -105 50 ~CHAIN *MLD CONNECTOR 12 -ANC -120 50 ~CHAIN *MLD CONNECTOR 13 -ANC -135 50 ~CHAIN *MLD CONNECTOR 14 -ANC -150 50 ~CHAIN *MLD END

$********************************************* MOVE ANCHORS $

&CONNECTOR @ -A_TENSION 690.00 &DCPTIME TIME TO CONNECT

$ $********************************************* MOORING TABLES $ CONN_DESIGN TABLE 1 REPORT END MOVE TKR -LINE 0.0 REPORT VLIST PLOT 1 5 -NO REPORT END END

&DCPTIME TIME TO END MOORING DESIGN $

$***************************************************************** *** hydrodynamics menu

100

HYDRODYNAMICS

g_pressure FPSO -heading %arah% V_MDRIFT

REPORT END $

&set gma = 2.5 $gamma $

&env sea_100 -depth 90 -sea jonswap %arah% 5.30 11.10 %gma% \ -current 0.90 %arah% \

-wind 4.15 %arah% $

end_&data

&set post_env = sea_100 $ $***************************************************************** **** frequency respons FREQ_RESP RAO $***************************************************************** *** std post processing

&loop env %post_env &describe body FPSO

FR_POINT &BODY(CG FPSO) report END st_point %env REPORT END &endloop END_FREQ_RESP $ $***************************************************************** ***** all done $ &FINISH

101 Page 5 Licensee - My Company Rev 6.00.025 Ser562

*************************************************************************************************************** * *** MOSES *** * * --- June 9, 2010 * * Response Amplitude Operators and Wave Drift Force * * * * Draft = 16.2 Meters Trim Angle = 0.00 Deg. GMT = 12.63 Meters * * Roll Gy. Radius = 12.2 Meters Pitch Gy. Radius = 82.6 Meters Yaw Gy. Radius = 82.6 Meters * * Heading = 90.00 Deg. Forward Speed = 0.00 Knots Linearization Based on 1/ 20 * * * *************************************************************************************************************** +++ M O T I O N R E S P O N S E O P E R A T O R S +++ =========================================================

Of Point X = 142.5 Y = 0.0 Z = 13.0 on Body FPSO

Process is DEFAULT: Units Are Degrees, Meters, and M-Tons Unless Specified

E N C O U N T E R Surge / Sway / Heave / Roll / Pitch / Yaw /

--- Frequency -(Rad/Sec)- -(Sec)- 0.2513 25.00 0.3142 20.00 0.3307 19.00 0.3491 18.00 0.3696 17.00 0.3927 16.00 0.4189 15.00 0.4333 14.50 0.4488 14.00 0.4654 13.50 0.4833 13.00 0.5027 12.50 0.5236 12.00 0.5464 11.50 0.5712 11.00 0.5984 10.50 0.6283 10.00 0.6614 Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Wave Ampl. Period /---/ /---/ /---/ /---/ /---/ /---/ Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase Ampl. Phase 0.000 0. 1.178 91. 0.945 1. 0.503 91. 0.002 166. 0.019 -83. 0.000 0. 1.000 91. 0.967 1. 0.649 90. 0.002 159. 0.007 -79. 0.000 0. 0.967 91. 0.977 1. 0.694 90. 0.003 157. 0.006 -77. 0.000 0. 0.932 91. 0.992 1. 0.747 90. 0.003 154. 0.005 -75. 0.000 0. 0.896 92. 1.014 1. 0.810 90. 0.003 150. 0.004 -73. 0.000 0. 0.858 92. 1.046 0. 0.885 90. 0.003 145. 0.003 -71. 0.000 0. 0.815 92. 1.096 -1. 0.977 90. 0.004 138. 0.002 -68. 0.000 0. 0.792 92. 1.130 -2. 1.030 90. 0.004 133. 0.002 -66. 0.000 0. 0.767 93. 1.174 -4. 1.090 90. 0.005 126. 0.002 -65. 0.000 0. 0.740 93. 1.227 -7. 1.159 90. 0.005 117. 0.002 -63. 0.000 0. 0.711 93. 1.290 -11. 1.240 90. 0.006 104. 0.001 -61. 0.000 0. 0.679 94. 1.355 -18. 1.336 90. 0.007 86. 0.001 -59. 0.000 0. 0.645 94. 1.395 -28. 1.455 90. 0.007 63. 0.001 -56. 0.000 0. 0.604 95. 1.355 -41. 1.594 87. 0.007 33. 0.001 -46. 0.000 0. 0.558 95. 1.183 -55. 1.779 84. 0.006 1. 0.000 0. 0.000 0. 0.504 96. 0.923 -68. 2.035 79. 0.004 -27. 0.000 0. 0.000 0. 0.436 98. 0.668 -76. 2.386 70. 0.002 -46. 0.001 50. 9.50 0.000 0. 0.349 104. 0.466 -79. 2.749 52. 0.001 -58. 0.001 46.

102 0.6981 9.00 0.000 0. 0.287 120. 0.320 -78. 2.830 22. 0.001 -63. 0.002 25. 0.7392 8.50 0.000 0. 0.308 136. 0.217 -73. 2.213 -17. 0.000 0. 0.001 -4. 0.7854 8.00 0.000 0. 0.299 139. 0.143 -66. 1.150 -37. 0.000 0. 0.001 -18. 0.8378 7.50 0.000 0. 0.256 147. 0.087 -55. 0.576 -33. 0.000 0. 0.001 -15. 0.8976 7.00 0.000 0. 0.211 158. 0.070 -38. 0.289 -23. 0.000 0. 0.000 0. 0.9666 6.50 0.000 0. 0.168 175. 0.039 -23. 0.125 -9. 0.000 0. 0.000 0. 1.0472 6.00 0.000 0. 0.117 -173. 0.022 3. 0.079 -169. 0.000 0. 0.000 0. 1.1424 5.50 0.000 0. 0.098 -127. 0.009 33. 0.037 44. 0.000 0. 0.000 0. 1.2566 5.00 0.000 0. 0.067 -87. 0.021 -119. 0.008 1. 0.000 0. 0.000 0. 1.3963 4.50 0.000 0. 0.040 -36. 0.004 143. 0.018 -16. 0.000 0. 0.000 0. 1.5708 4.00 0.000 0. 0.028 63. 0.001 76. 0.006 112. 0.000 0. 0.000 0. 2.0944 3.00 0.000 0. 0.011 63. 0.000 0. 0.001 52. 0.000 0. 0.000 0. Page 6 Licensee - My Company Rev 6.00.025 Ser562 ***************************************************************************************************************

* *** MOSES *** * * --- June 9, 2010 * * Response Amplitude Operators and Wave Drift Force * * * * Draft = 16.2 Meters Trim Angle = 0.00 Deg. GMT = 12.63 Meters * * Roll Gy. Radius = 12.2 Meters Pitch Gy. Radius = 82.6 Meters Yaw Gy. Radius = 82.6 Meters * * JONSWAP Height = 5.3 Meters Period = 11.1 Sec. M. Heading = 90.0 Deg. * * S. Coef.=200.0 Gamma = 2.50 * * * *************************************************************************************************************** +++ M O T I O N S T A T I S T I C S +++ ===========================================

Of Point X = 142.5 Y = 0.0 Z = 13.0 on Body FPSO

Maximum Responses Based on a Multiplier of 3.720

Process is DEFAULT: Units Are Degrees, Meters, and M-Tons Unless Specified

Single Amplitude Motions ---

Surge Sway Heave Roll Pitch Yaw Mag --- ---- --- ---- --- --- --- Root Mean Square 0.348 0.000 0.358 0.000 0.603 0.000 0.499 Ave of 1/3 Highest 0.695 0.000 0.717 0.000 1.207 0.000 0.999

103 Ave of 1/10 Highest 0.886 0.000 0.914 0.000 1.539 0.000 1.273

Maximum 1.293 0.000 1.333 0.000 2.245 0.000 1.857

Single Amplitude Velocities

---

Surge Sway Heave Roll Pitch Yaw Mag --- ---- --- ---- --- --- ---

Root Mean Square 0.137 0.000 0.144 0.000 0.261 0.000 0.198 Ave of 1/3 Highest 0.274 0.000 0.287 0.000 0.523 0.000 0.397 Ave of 1/10 Highest 0.349 0.000 0.366 0.000 0.667 0.000 0.506 Maximum 0.509 0.000 0.534 0.000 0.972 0.000 0.738 Single Amplitude Accelerations ---

Surge Sway Heave Roll Pitch Yaw Mag --- ---- --- ---- --- --- ---

Root Mean Square 0.058 0.000 0.062 0.000 0.116 0.000 0.085 Ave of 1/3 Highest 0.116 0.000 0.124 0.000 0.231 0.000 0.170 Ave of 1/10 Highest 0.148 0.000 0.158 0.000 0.295 0.000 0.217 Maximum 0.215 0.000 0.231 0.000 0.430 0.000 0.316 Page 7 Licensee - My Company Rev 6.00.025 Ser562 ***************************************************************************************************************

* *** MOSES *** *

* --- June 9, 2010 *

* Response Amplitude Operators and Wave Drift Force *

* * * * *************************************************************************************************************** +++ I N D E X O F O U T P U T +++ ===================================== PROPERTIES OF LINE 1 . . . 1 RESTORING FORCE VS EXCURSION OF FPSO . . . 2

MEAN WAVE DRIFT FORCES FOR FPSO . . . 4

MOTION RESPONSE OPERATORS . . . 5

MOTION STATISTICS . . . 6

104

INDEX OF OUTPUT . . . 7

Page 5 Licensee - Minimal MOSES Rev 7.00.044 Ser501 ***************************************************************************************************************

* *** MOSES *** *

* --- 4 June, 2010 *

* Hydrostatics of Belanak Natuna FPSO *

* ENGINEER : fahmy * * * *************************************************************************************************************** +++ H Y D R O S T A T I C P R O P E R T I E S +++ =================================================== For Body FPSO Process is DEFAULT: Units Are Degrees, Meters, and M-Tons Unless Specified /--- Condition ---//- Displac-/ /-- Center Of Buoyancy --// W.P. / /C. Flotation / /---- Metacentric Heights ----/ Draft Trim Roll ---X--- ---Y--- ---Z--- Area ---X--- ---Y--- -KMT- -KML- -BMT- -BML- 18.20 0.00 0.00 278343.44 142.50 0.00 9.24 15536. 142.50 0.00 24.77 352.69 15.53 343.46 18.30 0.00 0.00 279936.41 142.50 0.00 9.29 15542. 142.50 0.00 24.74 351.21 15.45 341.92 18.40 0.00 0.00 281530.13 142.50 0.00 9.34 15548. 142.50 0.00 24.71 349.74 15.37 340.40 18.50 0.00 0.00 283124.41 142.50 0.00 9.39 15555. 142.50 0.00 24.68 348.28 15.29 338.89 18.60 0.00 0.00 284719.50 142.50 0.00 9.44 15561. 142.50 0.00 24.65 346.85 15.21 337.40 18.70 0.00 0.00 286315.13 142.50 0.00 9.50 15567. 142.50 0.00 24.63 345.43 15.13 335.93 18.80 0.00 0.00 287911.44 142.50 0.00 9.55 15574. 142.50 0.00 24.60 344.02 15.05 334.47 18.90 0.00 0.00 289508.31 142.50 0.00 9.60 15580. 142.50 0.00 24.58 342.63 14.98 333.03

105

OUTPUT ANSYS PADA KONDISI EKSTREM LINGKUNGAN

PRINT S NODAL SOLUTION PER NODE

***** POST1 NODAL STRESS LISTING *****

LOAD STEP= 1 SUBSTEP= 1 TIME= 1.0000 LOAD CASE= 0 SHELL NODAL RESULTS ARE AT TOP

NODE S1 S2 S3 SINT SEQV

1 0.29327E+07-0.70496E+07-0.15805E+08 0.18738E+08 0.16239E+08 2 -0.82664E+06-0.19109E+07-0.14981E+08 0.14154E+08 0.13644E+08 4 0.20596E+07 0.19061E+06-0.90028E+07 0.11062E+08 0.10256E+08 6 0.22974E+07 98063. -0.71881E+07 0.94855E+07 0.85994E+07 8 0.20311E+07 -8250.7 -0.51197E+07 0.71509E+07 0.63805E+07 10 0.22508E+07-0.30713E+06-0.50824E+07 0.73332E+07 0.64468E+07 12 0.21151E+07-0.43690E+06-0.52780E+07 0.73930E+07 0.65041E+07 14 0.14472E+07-0.58584E+06-0.56562E+07 0.71034E+07 0.63364E+07 16 0.15747E+07-0.70469E+06-0.81653E+07 0.97401E+07 0.88240E+07 18 0.45976E+07 37091. -0.26492E+08 0.31089E+08 0.29078E+08 20 0.52961E+07 -6248.7 -0.25249E+08 0.30545E+08 0.28269E+08 22 0.53271E+07 16943. -0.24717E+08 0.30044E+08 0.27773E+08 24 0.54343E+07 6398.5 -0.25581E+08 0.31015E+08 0.28689E+08 26 0.48307E+07 10715. -0.28496E+08 0.33327E+08 0.31197E+08 28 0.34875E+07 2848.2 -0.34790E+08 0.38278E+08 0.36660E+08 30 36350. -0.41758E+06-0.25218E+08 0.25254E+08 0.25030E+08 32 0.37065E+07 16108. -0.26504E+08 0.30211E+08 0.28545E+08

106

34 0.13219E+07-0.12463E+06-0.26540E+08 0.27862E+08 0.27167E+08 36 0.13987E+06-0.18136E+07-0.26576E+08 0.26716E+08 0.25794E+08 38 50987. -0.36634E+07-0.26591E+08 0.26642E+08 0.24993E+08 40 26819. -0.39937E+07-0.26581E+08 0.26608E+08 0.24843E+08 42 25495. -0.29918E+07-0.26556E+08 0.26581E+08 0.25209E+08 44 33353. -0.15465E+07-0.26531E+08 0.26564E+08 0.25811E+08 47 0.28590E+06 -15711. -0.25350E+08 0.25636E+08 0.25487E+08 49 0.62385E+06 7892.6 -0.25725E+08 0.26349E+08 0.26047E+08 51 0.10462E+07 -2012.4 -0.26404E+08 0.27450E+08 0.26941E+08 53 0.10039E+07 2485.8 -0.27598E+08 0.28602E+08 0.28115E+08 55 0.34915E+06 -4687.9 -0.30149E+08 0.30499E+08 0.30323E+08 63 9022.2 -0.21275E+07-0.30656E+08 0.30665E+08 0.29655E+08

***** POST1 NODAL STRESS LISTING *****

LOAD STEP= 1 SUBSTEP= 1 TIME= 1.0000 LOAD CASE= 0 SHELL NODAL RESULTS ARE AT TOP

NODE S1 S2 S3 SINT SEQV

95 -6394.3 -0.35893E+07-0.26785E+08 0.26779E+08 0.25179E+08 97 -1407.5 -0.19506E+07-0.26181E+08 0.26180E+08 0.25261E+08 99 -4005.6 -0.15552E+07-0.25306E+08 0.25302E+08 0.24563E+08 101 5027.1 -0.18028E+07-0.25396E+08 0.25401E+08 0.24547E+08 103 -20005. -0.25021E+07-0.26213E+08 0.26193E+08 0.25044E+08 111 -5677.6 -0.33969E+07-0.26566E+08 0.26560E+08 0.25038E+08 113 -2337.6 -0.19858E+07-0.25845E+08 0.25843E+08 0.24910E+08 115 -4173.6 -0.16169E+07-0.25010E+08 0.25006E+08 0.24240E+08

107

117 6564.9 -0.16834E+07-0.25170E+08 0.25176E+08 0.24375E+08 119 -19470. -0.21710E+07-0.26089E+08 0.26069E+08 0.25063E+08 127 -5997.0 -0.32549E+07-0.27084E+08 0.27078E+08 0.25608E+08

***** POST1 NODAL STRESS LISTING *****

LOAD STEP= 1 SUBSTEP= 1 TIME= 1.0000 LOAD CASE= 0 SHELL NODAL RESULTS ARE AT TOP NODE 1826 3078 9781 5707 5707 VALUE -0.10624E+08-0.38676E+08-0.98429E+08 35453. 30704. MAXIMUM VALUES NODE 9837 849 6216 9781 9781

108

109

 _{Keandalan pada saat kondisi ekstrem lingkungan}  _{Keandalan pada saat 2 kali kondisi ekstrem lingkungan}

Σdata Σsucces Σfail Pof K

10 10 0 0.000 1.000 100 100 0 0.000 1.000 500 500 0 0.000 1.000 1000 1000 0 0.000 1.000 2000 2000 0 0.000 1.000 3000 3000 0 0.000 1.000 4000 4000 0 0.000 1.000 5000 5000 0 0.000 1.000 10000 9999 1 0.000 1.000

Σdata Σsucces Σfail Pof K

110

 _{Keandalan pada saat 3 kali kondisi ekstrem lingkungan}  _{Keandalan pada saat 3.5 kali kondisi ekstrem lingkungan}

Σdata Σsucces Σfail Pof K

10 8 2 0.200 0.800 100 83 17 0.170 0.830 500 425 75 0.150 0.850 1000 855 145 0.145 0.855 2000 1695 305 0.153 0.848 3000 2543 457 0.152 0.848 4000 3397 603 0.151 0.849 5000 4238 762 0.152 0.848 10000 8489 1511 0.151 0.849

Σdata Σsucces Σfail Pof K

10 4 6 0.600 0.400 100 30 70 0.700 0.300 500 148 352 0.704 0.296 1000 305 695 0.695 0.305 2000 613 1387 0.694 0.307 3000 908 2092 0.697 0.303 4000 1186 2814 0.704 0.297 5000 1518 3482 0.696 0.304 10000 3057 6943 0.694 0.306

111

 _{Keandalan pada saat 4 kali kondisi ekstrem lingkungan}



 _{Keandalan pada saat 5 kali kondisi ekstrem lingkungan}

Σdata Σsucces Σfail Pof K

10 6 4 0.400 0.600 100 48 52 0.520 0.480 500 230 270 0.540 0.460 1000 447 553 0.553 0.447 2000 861 1139 0.570 0.431 3000 1312 1688 0.563 0.437 4000 1743 2257 0.564 0.436 5000 2207 2793 0.559 0.441 10000 4383 5617 0.562 0.438

Σdata Σsucces Σfail Pof K

10 1 9 0.900 0.100 100 7 93 0.930 0.070 500 41 459 0.918 0.082 1000 80 920 0.920 0.080 2000 157 1843 0.922 0.079 3000 253 2747 0.916 0.084 4000 343 3657 0.914 0.086 5000 438 4562 0.912 0.088 10000 869 9131 0.913 0.087

112

 _{Keandalan pada saat 6 kali kondisi ekstrem lingkungan}  _{Keandalan pada saaAt 7 kali kondisi ekstrem lingkungan}

Σdata Σsucces Σfail Pof K

10 1 9 0.900 0.100 100 5 95 0.950 0.050 500 9 491 0.982 0.018 1000 16 984 0.984 0.016 2000 37 1963 0.982 0.019 3000 52 2948 0.983 0.017 4000 76 3924 0.981 0.019 5000 99 4901 0.980 0.020 10000 205 9795 0.980 0.021

Σdata Σsucces Σfail Pof K

10 0 10 1.000 0.000 100 0 100 1.000 0.000 500 4 496 0.992 0.008 1000 6 994 0.994 0.006 2000 14 1986 0.993 0.007 3000 19 2981 0.994 0.006 4000 24 3976 0.994 0.006 5000 30 4970 0.994 0.006 10000 64 9936 0.994 0.006

113

 _{Keandalan tiap kenaikan beban}  _{Keandalan sistem pada saat kondisi ekstrem lingkungan}

load σ_max Pof K

factor (Mpa) 1 96 0 1 2 192 0 1 3 289 0.151 0.849 3.5 337 0.6943 0.3057 4 326 0.5617 0.4383 5 369 0.9131 0.0869 6 401 0.9795 0.0205 7 424 0.9936 0.0064

Σdata Σsucces Σfail Pof K

115

BIODATA PENULIS

Fahmy Ardhiansyah dilahirkan di kota Ponorogo tepatnya pada tanggal 22 Juni 1987. Anak pertama dari dua bersaudara, dari pasangan Munardji dan Nur Aini. Penulis menempuh pendidikan formal dari TK sampai SMA di kota Ponorogo. Menyelesaikan pendidikan dasar di SDN Mangkujayan 1 pada tahun 2000, kemudian melanjuktak ke SMPN 1 Ponorogo (2000-2003), SMAN 2 Ponorogo (2003-2006). Setelah lulus sekolah, penulis mendapatkan kesempatan untuk melanjutkan studi di Jurusan Teknik Kelautan FTK – ITS melalui jalur PMDK Reguler dan terdaftar dengan NRP. 4306100037. Selema kuliah penulis aktif dalam kegiatan kemahasiswaan, seminar, penelitian bersama dosen. Organisasi kemahasiswaan seperti HIMATEKLA, KAMMI 1011, BAHRUL ILMI, dan Legislatif Mahasiswa ITS telah diikuti dalam rangka untuk pengembangan dirinya. Pada masa kuliah penulis juga menjadi asisten dosen dalam mata kuliah Sistem dan Operasi Kelautan, selain itu juga melakukan penelitian tentang aplikasi pemecah gelombang terapung. Saat ini penulis penulis tengah menekuni salah satu bidang keahlian di Jurusan Teknik Kelautan, yaitu bidang Hidrodinamika dan Struktur Bangunan Lepas Pantai. Tugas Akhir dengan judul Analisis Keandalan Scantling Support Structure System Gas Processing Module FPSO Belanak Terhadap Beban Ekstrem dapat diselesaikan dalam waktu satu semester oleh penulis.

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Dalam dokumen ANALISIS KEANDALAN SCANTLING SUPPORT STRUCTURE SYSTEM GAS PROCESSING MODULE FPSO BELANAK TERHADAP BEBAN EKSTREM (Halaman 109-135)