【摘要】 针对耗能减震结构的分析和优化设计过程中要遇到非比例阻尼和参数改变的情况,如果要较精确地求解系统的广义特征值问题,需经过两重迭代计算,这种迭代振动分析是非常麻烦的。为了保证非比例阻尼结构分析的精度和结构参数改变时迭代分析的效率,推导适用于非经典阻尼情况的复模态矩阵摄动法,提高了结构重分析的效率,通过算例分析,表明了该方法在一定范围内具有较高的精度。更多还原

【Abstract】 Changing parameters and non-proportional damping is usually encountered in the optimum analysis and design of structures with energy dissipaters. Double iterative computations are necessary to compute the generalized Eigen value accurately, which is very complicated. A complex modal matrix perturbation method for symmetrical systems is deduced for optimum analysis of non-proportionally damped structures. The method is proved to be efficient by the numerical example.更多还原