摘要
在通用有限元软件ANSYS平台上建立了桩-土-LNG储罐相互作用体系的三维整体有限元模型,分析了在IV类软土场地上考虑桩土相互作用对LNG储罐地震响应的影响。结果表明,LNG储罐的基底剪力峰值、倾覆力矩峰值和内罐壁等效应力最大值均有不同程度的减小,而最大晃动波高增大。另外还讨论了不同保温层刚度对LNG储罐地震响应的影响,通过对比发现,保温层刚度对储罐的地震响应具有重要的影响,随着保温层刚度在一定范围内的增加,基底剪力峰值、倾覆力矩峰值和最大晃动波高变化较小,但内罐壁等效应力最大值减小明显。
Based on the finite element analysis program ANSYS,a three-dimensional integral finite element model of a pile-soil-LNG storage tank interaction system was established,the effect of pile-soil interaction on the seismic response of the LNG storage tank was analyzed in a soft site of class IV.Analysis results showed that the peak shear force,the peak overturning moment and the maximum Von Mises equivalent stress of the inner steel wall of the LNG storage tank drop at different levels,but the maximum sloshing wave height of liquid rises;in addition,the effect of insulation layer stiffness on the seismic response of the LNG storage tank is also analyzed,it has an important influence on the seismic response of the LNG storage tank;with increase in insulation layer stiffness in a certain range,the peak shear force,the peak overturning moment and the maximum sloshing wave height vary a little,but the maximum Von Mises equivalent stress of the inner steel wall decreases significantly.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第7期24-30,50,共8页
Journal of Vibration and Shock
基金
国家自然科学基金项目资助(51178355)
科技部国家重点实验室基础研究基金项目资助(SLDRCE10-D-01)
关键词
LNG储罐
流固耦合
桩土相互作用
数值模拟
LNG storage tank
fluid-structure interaction
pile-soil interaction
numerical simulation
