Study on Global Strength of the New Floating Drilling, Production, Storage and Offloading Structure

Abstract

Abstract:

Nowadays, the deep water in China is in the early developing stage, and it adapts for floating drilling, production, storage and offloading structure (FDPSO), which integrates the functions of drilling, production and storage. FDPSO can reduce much expense for early development of oil field. In this paper, a new-style eight-square FDPSO is studied. Based on the complex environment in deep water and the load cases, the global structure model is built. According to the three-dimensional potential flow theory and spectra-based analysis method, the wave loads are calculated and design wave parameters are decided. By transferring the design wave loads to global structure model, the structure stress is obtained. The calculation results can provide theoretical reference for the design of FDPSO working in the oil fields of deep water.

Key words: floating drilling,production,storage and offloading structure, design wave method, finite element model, global structural strength

CLC Number:

TE952

Jing ZHAO, Lei LIU, Fu-hong JIANG, Zhi-gang YANG, Bin XIE, Shi-sheng WANG, Xi-chong YU, Jing-rui ZHAO. Study on Global Strength of the New Floating Drilling, Production, Storage and Offloading Structure[J]. Ocean Engineering Equipment and Technology, 2015, 2(1): 6-6.

Figures/Tables 11

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Table 1

Table 2

Table 3

Table 4

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Fig.5

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Fig.7

位置	X	Y	Z	RX	RY	RZ
艉部左舷	自由	自由	固定	自由	自由	自由
艉部右舷	自由	固定	固定	自由	自由	自由
艏部中线	固定	固定	固定	自由	自由	自由

设计工况	压载			满载
设计工况	浪向 /(°)	波幅 /m	周期 /s	浪向 /(°)	波幅 /m	周期 /s
生存工况	180	7.92	8.74	0	16.21	9.00
作业工况	180	3.00	8.76	0	8.00	9.00

支座位置	X	Y	Z	RX	RY	RZ
艉部左舷	4.032×10^-6	4.990×10^-5	-5.876×10^-5	4.453×10^-2	-1.814×10^-2	-9.542×10^-3
艉部右舷	-1.510×10^-6	-1.346×10^-7	-5.950×10^-8	1.218×10^-2	8.737×10^-3	2.025×10^-2
艏部中线	8.272×10^-6	5.915×10^-7	3.131×10^-7	3.149×10^-2	-3.352×10^-2	5.169×10^-3

结构名称	最大应力计算值		许用应力
结构名称	压载条件		满载条件
主甲板	218.75	187.77	319.82
外底板	135.06	298.63	319.82
内底板	212.27	168.77	319.82
上层建筑	221.80	152.75	319.82
钻台	200.23	174.90	319.82
水平平台	141.11	186.69	319.82
横舱壁	294.23	303.72	319.82
纵舱壁	316.09	313.72	319.82
船体外板	300.77	298.63	319.82
水平强框架	315.00	310.58	319.82

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