深海脐带缆总体响应特性研究

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摘要

对某深海脐带缆的总体布局进行了选型设计研究.脐带缆的设计研究正逐渐成为国内海洋工程领域的研究热点,对于脐带缆设计而言总体响应分析是其关键课题.首先推导了悬链线和缓波形两种布局的线型方程.进而基于推导的方程,在有限元软件OrcaFlex中建立了脐带缆悬链线和缓波形两种布局的数值模型,对比分析了两种布局形态下的有效张力和弯曲曲率等响应特性.研究发现相对于悬链线布局,缓波形布局线型较复杂,但能有效降低悬挂点处有效张力.浮力块能有效缓解上部动态响应向触地点处的传播.此外,对缓波形布局中浮子段长度,浮力因子和浮子段起始位置等关键参数对总体响应的影响进行了敏感性分析.所得结论便于设计人员理解脐带缆总体响应特性,选择合适的参数用于脐带缆总体设计.

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	陈希恰
	宋磊建
	杜夏英
	万军
	付世晓

关键词 ：深海脐带缆, 总体响应, 悬链线, 缓波形, 有效张力, 弯曲曲率

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

收稿日期: 2015-01-22 出版日期: 2016-03-30

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作者简介:

作者简介:陈希恰(1988--),男,硕士,主要从事海洋工程结构物强度与疲劳分析方面的研究.

引用本文:

陈希恰, 宋磊建, 杜夏英, 万军, 付世晓. 深海脐带缆总体响应特性研究[J]. 海洋工程装备与技术, 2015, 2(2): 111-117.
Xi-qia CHEN, Lei-jian SONG, Xia-ying DU, Jun WAN, Shi-xiao FU. Global Response Analysis for the Deep-Sea Umbilical. Ocean Engineering Equipment and Technology, 2015, 2(2): 111-117.

链接本文:

https://www.qk.sjtu.edu.cn/oeet/CN/ 或 https://www.qk.sjtu.edu.cn/oeet/CN/Y2015/V2/I2/111

Fig.1 悬链线布局线型示意图

Fig.2 缓波形布局线型示意图

Fig.3 深海脐带缆结构

Table 1 脐带缆等效结构参数

Table 2 悬链线布局和缓波形布局基本参数

Fig.4 悬链线布局有限元模型

Fig.5 缓波形布局有限元模型

Fig.6 静态有效张力分布对比

Fig.7 静态弯曲曲率分布对比

Table 3 环境参数

Fig.8 悬链线脐带缆动态张力分布图

Fig.9 缓波形脐带缆动态张力分布图

Fig.10 悬链线脐带缆动态曲率分布图

Fig.11 缓波形脐带缆动态曲率分布图

Fig.12 不同浮子断长度下弯曲曲率分布对比

Fig.13 不同浮子断长度下有效张力分布对比

Fig.14 不同浮力因子下弯曲曲率分布对比

Fig.15 不同浮力因子下有效张力分布对比

Fig.16 不同浮子段起始位置下弯曲曲率分布对比

Fig.17 不同浮子段起始位置下有效张力分布对比

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