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带有损伤构件的海上采油平台的重分析方法 被引量:3

Re-analysis Method on Ultimate Strength of Offshore Platformwith Damaged Tubular Members
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摘要 采用非线性有限单元法 ,将各种管单元局部损伤进行有限元网格细分 ,通过刚度矩阵的静力凝聚方法 ,将损伤单元统一为等效的非线性梁单元 ,然后再与整体平台结合进行重分析 ,获得损伤后平台的极限强度。本方法对局部损伤的形式不附加任何限制 ,并可方便地求解整体结构的后屈曲破坏结果 ;准确地反映了损伤所引起的弯曲与轴向耦合刚度的变化。 In this paper,nonlinear finite element method is used to simulate various local defects of tubular members as equivalent nonlinar beam elements.This procedure can be applied to any form of local damage deformation with no additional limitation.It is rather convenient to implement with nonlinear finite element program to yield post collapse result of the whole structure.The equivalent beam model can reflect the nonlinear characteristics of compressing stiffness with change of loads acting on the damaged member.A computer program was developed to predict the load deflection behaviors,equivalent nonlinear beam stiffness for damaged tubular member and to calculate the ultimate load.post collapse curve of the whole offshore platform.
出处 《中国海洋平台》 2001年第3期5-11,共7页 China offshore Platform
关键词 等效刚度 局部损伤构件 极限刚度 海上采油平台 重分析方法 equivalent stiffness,local damage,ultimate strength,tubular member offshore platform
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参考文献1

  • 1许滨 申仲翰 等.渤海八号导管架生产平台极限承载力分析.第七届全国海洋工程学术会议论文集[M].,1995.276.

同被引文献21

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  • 6[10]沈祖炎,董石麟,陈学潮.空间网格结构论文集.上海:同济大学出版社,1991:124-136
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