我在ANSYS里进行了模态分析,提取出各阶的位移值,

2024-12-11 15:24:04
推荐回答(2个)
回答1:

建议看看结构动力学方面的基础书籍,那个位移数值其实就是位移,只不过这个位移不是结构的真实位移,而是结构对应于各阶频率的模态位移。它反映的是结构的振动特性,比如,结构的一阶频率1.4HZ,一阶振动形态是个竖向的正弦半波。那么这就是简支梁的典型振动特征。值得注意的是,这个模态位移对于各阶频率来说,也只是个相对大小。ANSYS默认的是关于质量矩阵归一化的模态。而如何由得到的模态位移求结构在动力荷载下的真实位移,要用到模态叠加的方法去求。模态分析只是结构动力分析的第一步,接下来还要继续分析 ,求出所谓的各阶的振型坐标。才能最终通过线形叠加的方法得到结构在荷载下的响应。我感觉你可能对结构的动力分析的基本知识不太熟悉。建议先把基本的弄清楚。ANSYS只是个工具而已。

回答2:

两种后处理方法:1,通用后处理可以看到某一时刻点的全局位移图,2,还有就是时域位移图,可以看到某一节点处的时域图。 你的情况用用第二种方法。

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