计算模态是指相对于试验模态而言，从仿真计算的角度出发，得到模态的一系列参数，
基于计算模态，建立箱体的振动测试模型。
Based on theoretical modes, this paper illustrates the model for testing vibration of the cabinet.
然后建立了箱体的有限元模型，对其进行了计算模态分析。
Then, a finite element model of the cabinet was established for calculating modal analysis.
应用an - SYS对运煤敞车空车和重车进行计算模态分析。
The numerical modal analyses of the empty and full loaded open boxcar are carried out in the ANASYS software.
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