Global Response Analysis for the Deep-Sea Umbilical

Abstract

Abstract:

We present the global analysis for the deep-sea umbilical. The design and analysis of the umbilical has become the research focus in the offshore engineering field. Global response analysis is the key issue in the research of umbilical. We present the theoretical models of the free hanging catenary shape and the lazy-wave shape at first. Based on the theoretical models, the umbilical models of the free hanging catenary shape and lazy-wave shape are then developed in OrcaFlex. The distribution characteristics of effective tension and bending curvature are calculated and compared. The results show that the shape of the lazy-wave is more complex than that of the free hanging catenary. However, the lazy-wave shape can reduce the effective tension at the top hanging points and dynamic response at the touchdown point, which makes it more applicable in the deep sea. Meanwhile, the sensitivity analysis of the generalized configuration parameters, including the length of the buoyancy catenary, the buoyancy factor and the starting location of the buoyancy catenary, is performed and the effect of the configuration parameters on the static characteristics of the umbilical is studied. The research results may provide a reference for the configuration design of the deep-sea umbilical.

Key words: deep-sea umbilical, global response, free hanging catenary, lazy-wave shape, effective tension, bending curvature

CLC Number:

TE52

Xi-qia CHEN, Lei-jian SONG, Xia-ying DU, Jun WAN, Shi-xiao FU. Global Response Analysis for the Deep-Sea Umbilical[J]. Ocean Engineering Equipment and Technology, 2015, 2(2): 111-117.

Figures/Tables 20

Fig.1

Fig.2

Fig.3

Table 1

Table 2

Fig.4

Fig.5

Fig.6

Fig.7

Table 3

Fig.8

Fig.9

Fig.10

Fig.11

Fig.12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

References 13

[1]	黄维平,白兴兰,李华军.国外深水钢悬链线立管研究发展现状[J].中国海洋大学学报,2009,39(2):290.
[2]	谢彬,段梦兰,秦太验,等.海洋深水立管的疲劳断裂与可靠性评估研究进展[J].石油学报,2004,25(3):95.
[3]	宋磊建,付世晓,陈希恰,等.深海脐带缆总体响应特性比较研究[J].振动与冲击,2014,33(1):119.
[4]	da Silveira L M Y, Tanaka R L, Novaes J P Z. Rayleigh damping effects on global analysis of umbilicals[C]. OMAE, 2011: 49584.
[5]	Qiu W, Cao Q, Librino F, et al.Global design and analysis of umbilical in offshore applications[C]. OMAE, 2009: 79841.
[6]	Howells H. Advances in steel catenary riser design[C]. DEEPTEC'95, 1995.
[7]	Hatton S.Update on the design of steel catenary riser systems[R]. 1999.
[8]	Yue B, Walters D, Yu W.Lazy wave SCR on turret moored FPSO[C]. ISOPE, 2011: 16.
[9]	孙丽萍,周佳,王佳琦.深水柔性立管的缓波形布置及参数敏感性分析[J].中国海洋平台,2011,26(3):37.
[10]	Yang H, Li H.Sensitivity analysis of fatigue life prediction for deepwater steel lazy wave catenary risers[J]. Science China Technological Sciences, 2011, 54(7): 1881.
[11]	Li S, Nguyen C.Dynamic response of deepwater lazy-wave catenary riser[C]. DOT International, 2010.
[12]	Orcina. OrcaFlex manual: version 9.0a[M]. Cumbria: Orcina, 2006.
[13]	International Organization for Standardization. ISO 13628-5. Petroleum and natural gas industries--design and operation of subsea production systems. Part 5: subsea umbilicals[S]. 2002.

等效参数	取值
总长/m	2500
外径/m	0.107
内径/m	0.061
单位长度湿重/(kg·m^-1)	14.8
拉伸刚度/N	3.52×10⁸
弯曲刚度(N·m^-2)	2870

布局形式	布局参数	取值
悬链线	顶端悬挂点水深/m	1480
悬链线	顶端悬挂角/(°)	15
缓波形	顶端悬挂点水深/m	1480
	顶端悬挂角/(°)	15
	悬垂段长度/m	1500
	浮子段单位质量/(kg·m^-1)	-36.5
	浮子段长度/m	250
	浮力因子	2.47

环境参数	取值
水深/m	1500
波高/m	8
周期/s	10
表面流速/(m·s^-1)	1.5
拖曳力系数CD	1
惯性力系数CM	2