Stress and strain of elastic beam under inertial load was analyzed, and modal analysis of elastic structure was figured out.
分析了在惯性载荷作用下的弹性梁的应力及应变，并对弹性结构进行了模态分析。
Finally based on analysis results, the maximum stress and displacement are taken as state variables to carry out mass optimization with total mass of bus body as objective function.
最后根据分析结果选取车身最大应力和位移作为状态变量，以车身总质量为目标函数，进行客车车身的质量优化。
The satisfactory results are obtained by using concrete calculative examples, A new method is provided to carry out finite element stress analysis for different modulus material.
经过实例分析计算，获得了满意的结果。 为对这类材料的结构进行有限元应力分析提供了一种新方法。
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