模态截断对车体结构动态响应的影响

Effects Analyses of Modal Cut-off on Vehicle Hull Structural Dynamic Response

1.
Vehicle Engineer Office of Mechanical Department, Academy of Armored Force Engineering, Beijing 100072

摘要: 针对复杂车辆系统机械结构在建模与仿真计算中的模型规模、计算精度和计算速度之间相互制约的问题,采用模态响应线性叠加方法,分析并讨论了车辆的激励频率与结构固有频率截取对结构动态响应的影响。通过引入阈值概念提出模态截断频率的计算方法,并以某装甲车辆刚弹耦合模型为例进行了仿真验算。
- 结构动态响应 /
- 模态响应线性叠加法 /
- 激励频率 /
- 模态截断 /
- 阈值
Abstract: Focusing on the conflicts among model size,calculation precision and computation speed in the complex vehicle structural modeling and simulation,the effects of vehicle exciting frequency and structural natural frequency cut-off on the structural dynamic response,were investigated in this paper based on the modal response linear cumulating method.Through introducing the concept of threshold value,the calculation method of modal cut-off frequency has been suggested,which is validated by an example of some armored vehicle rigid-flex coupled model.
- structural dynamic response /
- modal response linear cumulating method /
- exciting frequency /
- modal cut- off /
- threshold value

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