非黏结柔性立管骨架层失效数值计算方法

上海交通大学学报 ›› 2016, Vol. 50 ›› Issue (03): 465-471.

非黏结柔性立管骨架层失效数值计算方法

任少飞，唐文勇，薛鸿祥

(上海交通大学海洋工程国家重点实验室，高新船舶与深海开发装备协同创新中心，上海 200240)

收稿日期:2015-03-19 出版日期:2016-03-28 发布日期:2016-03-28
基金资助:
国家自然科学基金重大项目（51490674）, 国家自然科学基金项目（51579146），上海市自然科学基金项目（15ZR1423500）

Numerical Method to Predict Failure of Carcass Layer of Unbonded Flexible Risers

REN Shaofei，TANG Wenyong，XUE Hongxiang

(State Key Laboratory of Ocean Engineering; Collaborative Innovation Center for Advanced Ship and DeepSea Exploration, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2015-03-19 Online:2016-03-28 Published:2016-03-28

摘要/Abstract

摘要： 摘要：计入骨架层铺设角度、初始椭圆度、材料非线性，对相邻表面分别采用黏结耦合、摩擦系数不为零的库伦摩擦和光滑摩擦3种接触条件，基于ABAQUS研究了一类非黏结柔性立管骨架层在均匀外压和对径压缩力下的失效特性.计算结果表明：骨架层相邻表面间接触条件对失效特性影响较大；铺设角度对骨架层失效特性的影响可忽略不计；计入初始椭圆度和材料非线性后，均匀外压下骨架层临界压溃值大幅降低，对径压缩力下径向位移大幅增大.文中数值方法可弥补理论方法无法计入上述因素对骨架层失效特性影响的缺陷.

关键词: 非黏结柔性立管, 骨架层, 失效, 材料非线性, 初始椭圆度

Abstract: Abstract： In order to investigate the failure property of carcass layer, the lay angle, initial ovality and material nonlinearity of carcass layer were considered in this paper. Meanwhile, three kinds of contact conditions, i.e, bonded coupling, coulomb friction with friction coefficient, and smooth friction were adopted to simulate the contact between adjacent surfaces of carcass layer. Finally, failure properties of a typical carcass layer of unbonded flexible riser under uniform external pressure and two forces acting along a diameter were predicted by using ABAQUS. It is shown that the contact condition between adjacent surfaces of carcass layer has a great influence on failure property. The lay angle effect on failure property can be ignored. With initial ovality and material nonlinearity, the critical pressure of carcass layer under uniform external pressure is sharply decreased, while the radial displacement of carcass layer under crushing is greatly increased. The numerical method can remedy the flaw of analytical method which cannot take the above factors into consideration.

Key words: Key words： unbonded flexible risers, carcass, failure, material nonlinearity, initial ovality

中图分类号:

P 751

任少飞, 唐文勇, 薛鸿祥. 非黏结柔性立管骨架层失效数值计算方法[J]. 上海交通大学学报, 2016, 50(03): 465-471.

REN Shaofei, TANG Wenyong, XUE Hongxiang. Numerical Method to Predict Failure of Carcass Layer of Unbonded Flexible Risers[J]. Journal of Shanghai Jiao Tong University, 2016, 50(03): 465-471.

参考文献

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