多自由度系统准静态刚度理论研究

通过对多自由度系统的模态函数进行分析和研究，探讨了多自由度系统的准静态刚度理论，并分析了多自由度系统在准静态区内动柔度与静柔度之间的理论误差，在机床准静态刚度试验中得到了验证，解决了用单自由度理论研究的准静态刚度试验方法可应用于多自由度机床静刚度测量的理论问题。

Research on Quasi static Rigidity Theory of Multi freedom System

According to analysis and research made on mode function of multi freedom system, the paper discusses the quasi static theory of multi freedom system, an analysis is made on the theoritcal error between dynamic flexibility and static flexibility in quasi static area of multi freedom system which is proved in quasi static rigidity test of machine tool. It solves theoretical problem that applying quasi static rigidity testing method of single freedom theoretical research to static rigidity testing of machine tool with multi freedom.