清华大学针对Marc编写的关于杆系结构模型分析所用的子程序-10层框架结构算例程序-Example program for Tsinghua University on Frame Structure Model Marc written subroutines used layer frame-10 Operators

实现随机振动过程中的结构衰减信号提取，运行模态分析(The structure attenuation signal extraction and modal analysis are realized during random vibration)