浮式液化天然气液货围护系统的失效模式分析

海洋工程装备与技术 ›› 2014, Vol. 1 ›› Issue (1): 50-54.

浮式液化天然气液货围护系统的失效模式分析

刘婷婷¹, 阮诗伦^1,^*, 尹江洲¹, 岳前进¹, 谢彬²

1. 大连理工大学工业装备结构分析国家重点实验室, 辽宁大连 116024
2. 中海油研究总院, 北京 100027

收稿日期:2014-02-21 出版日期:2014-01-30 发布日期:2017-12-07
通讯作者: 阮诗伦
作者简介:
刘婷婷(1981--), 女, 博士后, 主要从事海洋工程结构分析和流体晃荡冲击方面的研究.
基金资助:
国家科技重大专项(2011ZX05026-006-06);工业装备结构分析国家重点实验室自主研究课题(S13207)

Failure Modes Analysis of Box Structure of the Containment System in FLNG

Ting-ting LIU¹, Shi-lun RUAN¹, Jiang-zhou YIN¹, Qian-jin YUE¹, Bin XIE²

1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, Liaoning 116024, China
2. CNOOC Research Institute, Beijing 100027, China

Received:2014-02-21 Online:2014-01-30 Published:2017-12-07

摘要/Abstract

摘要：

针对浮式液化天然气生产储卸装置(FLNG)中液货围护系统因晃荡引起的结构安全问题, 以主流舱型GTT NO96薄膜型液舱围护系统为对象, 分别建立了围护系统截面整体和局部有限元模型.采用有限元数值仿真方法系统地分析了准静力加载下液货围护系统可能的失效模式, 得到了不同失效模式下的危险区域及对应的极限荷载, 为FLNG液舱围护系统结构安全设计提供参考.结果表明: 当前设计中的GTT NO96型液舱的主要失效模式是发生在次层木箱顶板与两层木箱加强挡板交叉点处的强度失效, 失效载荷为0.38 MPa.

关键词: 围护系统, 失效模式, 浮式液化天然气生产储卸装置, 晃荡荷载

Abstract:

The global and local finite element models of the mainstream containment system GTT NO96 of the floating liquid natural gas unit (FLNG) are established to evaluate the structural safety of tanks under the sloshing load. The failure modes of the models under quasi-static loading are systematically simulated by finite element method. The failure zones and extreme loads for different failure modes are obtained, which could provide a reference for the design of FLNG containment system. The results suggest that the main failure mode of the current design of FLNG container is the strength failure of the cover plate of the secondary insulation box at the intersection between the bulkheads of the primary and secondary boxes, and the extreme load is 0.38 MPa.

中图分类号:

TE88

刘婷婷, 阮诗伦, 尹江洲, 岳前进, 谢彬. 浮式液化天然气液货围护系统的失效模式分析[J]. 海洋工程装备与技术, 2014, 1(1): 50-54.

Ting-ting LIU, Shi-lun RUAN, Jiang-zhou YIN, Qian-jin YUE, Bin XIE. Failure Modes Analysis of Box Structure of the Containment System in FLNG[J]. Ocean Engineering Equipment and Technology, 2014, 1(1): 50-54.

图/表 7

图1

图2

图3

图4

图5

图6

图7

参考文献 10

[1]	Det Norske Veritas.Classification notes No. 30.9. Sloshing analysis of LNG membrane tanks[S]. Oslo: Det Norske Veritas, 2006.
[2]	American Bureau of Shipping. Guidance notes on strength assessment of membrane-type LNG containment systems under sloshing loads[S]. Houston: American Bureau of Shipping, 2009.
[3]	Det Norske Veritas.Strength assessment of LNG membrane tanks under sloshing loads[S]. Oslo: Det Norske Veritas, 2011.
[4]	Lloyd's Register. Sloshing assessment guidance document for membrane tank LNG operations[S]. London: Lloyd's Register, 2009.
[5]	Dobashi H, Usami A.Structural response of the insulation box on NO96 membrane containment system[C]. 20th International Offshore and Polar Engineering Conference, 2010: 26.
[6]	Arswendy A, Liasjoe O, Moan T.Comparative study of FE models of LNG containment system NO. 96[C]. 20th International Offshore and Polar Engineering Conference, 2010: 62.
[7]	庄志鹏, 刘俊, 唐文勇. 薄膜型LNG船晃荡冲击局部强度分析建模方法研究[J]. 船舶工程, 2011, 33(3): 17.
[8]	陆晔, 滕蓓, 祁恩荣. LNG船液舱围护系统结构极限承载力研究[J]. 舰船科学技术, 2012, 34(2): 36.
[9]	滕蓓, 祁恩荣, 陆晔, 等. 大型LNG船液舱晃荡结构动响应研究[J]. 船舶科学技术, 2012, 34(4): 7.
[10]	Grazyk M, Berget K, Allers J.Experimental investigation of invar edge effect in membrane LNG tanks[J]. J Offshore Mechanics and Arctic Engineering, 2012, 134(3): 031801.