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.
模态分析的矩阵摄动法在灵敏度分析和重分析中有广泛的应用。
Several perturbation methods for mode analysis were briefly summarized in this paper, some of which were widely applied in sensitivity analysis as well as reanalysis.
通过模态分析发现，浮吊结构的振型主要表现为主钩钢丝绳-吊重系统摆动和臂架振动，振动频率都很低；
Through the modal analysis, it is found that main vibration modes of floating crane structure are swing of rope-load system and vibration of boom, and the vibration frequencies are low;
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