LNG储罐外壁地震响应有限元分析
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摘要
利用ADINA分别建立LNG储罐空罐SHELL壳体单元及3D-SOLID实体单元有限元模型.对2种模型进行模态分析,验证SHELL单元模型的有效性.在El Centro地震波作用下对LNG储罐混凝土外壁进行地震响应分析.结果表明:在地震作用下,LNG储罐外壁的位移和加速度沿罐高方向逐渐增大;空罐时,LNG储罐外壁位移及加速度时程曲线与地震波形基本一致.
The finite element models based on SHELL element and 3D-SOLID element are established for empty LNG tank by using ADINA.The modal analysis of the two models are processed to verify the validity of SHELL element model.The seismic response of outer concrete wall of LNG tank under El Centro seismic waves is analyzed.The results show that the displacement and acceleration of LNG tank outer wall gradually increases along wall height direction under the effect of earthquake;the time-history curves of displacement and acceleration of LNG tank outer wall are consistent with the seismic waves when the tank is empty.
The finite element models based on SHELL element and 3D-SOLID element are established for empty LNG tank by using ADINA.The modal analysis of the two models are processed to verify the validity of SHELL element model.The seismic response of outer concrete wall of LNG tank under El Centro seismic waves is analyzed.The results show that the displacement and acceleration of LNG tank outer wall gradually increases along wall height direction under the effect of earthquake;the time-history curves of displacement and acceleration of LNG tank outer wall are consistent with the seismic waves when the tank is empty.
引文
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[4]李宏男,李忠献.结构振动与控制[M].中国建筑工业出版社,2005:58-69.
[5]姜英明.立式圆筒形储罐自振频率的计算[J].化工设备与管道,2004(6):35-38.JIANG YingMing.Calculation of natural vibration frequencies for vertical cylindrical storage tanks[J].Process Equipment&Piping,2004(6):35-38.
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