在进行大型结构的地震反应结析当中,求解特征值问题是最费事的一个环节。地震工程研究中心的研究人员在和外单位人员的协作下,最近完成的研究表明:求解这类问题的一种新方法——用里兹向量和求解自由振动振型的精确特征值的方法相比,计算精度更高,计算费用更低。波的传播以及一维、二维和三维结构体系中结构反应等很多问题的求解都表明这 In the seismic response analysis of large-scale structures, solving the eigenvalue problem is the most troublesome step. Researchers from the Earthquake Engineering Research Center, in collaboration with the staff of the external unit, recently completed a study demonstrating a new method for solving such problems: using the Ritz vector and methods for solving the exact eigenvalues ​​of the free vibration modes. In comparison, the calculation accuracy is higher and the calculation cost is lower. The propagation of waves and the solution of many problems in one-dimensional, two-dimensional, and three-dimensional structural systems, etc.