摘要
针对新型的大圆筒薄壳结构的复杂动力特性,建立大圆筒结构-土-波浪相互作用的三维非线性有限元模型.通过设定无厚度的接触面单元,来模拟薄壳圆筒-土之间的非线性接触特性;采用土体的非线性本构模型,并同时计入波浪等动荷载的作用对结构进行动力响应分析,得到大圆筒上的x方向及y方向应力分布规律,以及应力随波浪力和埋深的变化规律;最终给出了圆筒结构的应力分布函数式及合理的壁厚尺度。
Based on the complex dynamic characteristics of new shell structure,a 3-D nonlinear finite element model of interaction between large cylinder structure,soil and wave is established.The non-linear contact characteristics between shell structure and soil are simulated by setting contact element of zero thickness.The non-linear constitutive model of soil is used to simulate dynamic response analysis of the structure under the dynamic loads on waves.The distribution of stress in x-and y-directions,the changing law of stress with wave and buried depth are obtained.Finally the stress distribution function and reasonable size of cylinder structure are given.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期87-91,共5页
Journal of Shanghai University:Natural Science Edition
基金
国家自然科学基金资助项目(11072143)
关键词
大圆筒结构
动力响应
应力函数
large cylinder structure
dynamic response
stress function
