质量矩阵模式对桥梁自振频率的影响

Influence of mass matrix model on natural vibration frequency of bridges

利用自编程序和ANSYS结构分析软件对几座大跨度桥梁的自振特性分别采用一致质量矩阵和堆聚质量矩阵进行了计算比较，结果表明，对于大型复杂桥跨结构的动力分析宜采用一致质量矩阵模型。

In the thesis, the author calculates the natural vibration frequencies of several wide-span bridges by using lumped mass matrix and consistent mass matrix. Through the analysis and comparison of the results, it was found that the dynamic analysis on large and complicated bridges can be carried out by using consistent mass matrix.