【摘要】 本文分两部分:1.联合应用有限元和边界积分法对带顶盖的圆柱形储液罐进行自振分析,并用反应谱方法求地震反应。研究了顶盖、静水压力等因素对各阶环向振型频率的影响和罐体自身质量、液面以上罐体刚度对包含有cosθ的振型的频率和地震内力的影响,建议了一个计算拱顶罐动力反应的简化模型。2.在此基础上,用有限元-级数展开法对水平地震作用下的储液罐的稳定性作了探讨,讨论了环向内力和平错内力对储液罐稳定性的影响以及液面附近罐壁失稳的现象,对目前规范中有关储液罐稳定验算方法作了评价。两部分的计算结果与试验结果作了比较。更多还原

【Abstract】 There are two parts in this paper: 1.The natural frequencies and earthquake responses of two domed circular cylindrical liquid storage tanks are calculated by using finite element-boundary integration method. The effect of the dome, the hydrostatic pressure, the part of the tank above the liquid surface and the mass of the tank itself on the natural frequencies and the dynamic stresses of the tanks are studied. Dynamic stresses corresponding to modes of higher frequency are also evaluated and an approximate model for domed circular cylindrical liquid-storage tanks is proposed. 2. The buckling of the tank wall under horizontal earthquake action is studied by using finite element-Fourier expanding method.It is found that the axial membrane stress has a dominant effect on tank wall buckling. The buckling phenomenon of the tank wall near the liquid surface is also discussed. The results of the dynamic and stability analysis are compared with the experimental results obtained by others.更多还原