【摘要】 对双层圆柱形储液罐动力稳定性进行了分析．使用有限元法和解析法相结合的方法，考虑阻尼产生的几何刚度矩阵，在竖向载荷下，求解动力稳定性问题．由于考虑阻尼产生的几何刚度矩阵，当结构自由度数目较大时，直接求解方程是困难的．使用二次摄动法使求解得到简化。更多还原

【Abstract】 An analysis is conducted on the dynamic stability of two-layer cylindrical liquid storage tankers. By combining finite element method with analgtics, with the geometric stiffness matrix produced by damping taken into account, the analysis is made to solvedynamic stability under vertical load. As is difficult to solve the equation when freedom of structure is big, quadratic pertarbation method is applied to simplify the solution.更多还原