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为了抑制车顶设备自身激励源对车体振动的影响,提出了一种基于刚柔耦合动力学模型的设备减振设计方案。建立有限元模型,通过有限元分析进行车体模态计算;建立动力学模型,进行振型分析。利用分析结果和减振理论确定设备的频率范围。建立刚柔耦合动力学模型,对设备频率进行优化。研究表明,车顶设备频率选取10Hz时,支撑点能起到明显隔振效果,设备动挠度小于2mm,减振性能满足设计要求。
In order to restrain the influence of self-excitation source of roof equipment on vehicle body vibration, a design scheme of equipment vibration reduction based on rigid-flexible coupling dynamic model is proposed. The finite element model is established, and the modal calculation is carried out by finite element analysis. The dynamic model is established and the vibration mode analysis is carried out. Use the analysis results and damping theory to determine the frequency range of the equipment. A rigid-flexible coupled dynamic model is established to optimize the equipment frequency. The research shows that when the frequency of the roof equipment is chosen as 10Hz, the support point can play a significant vibration isolation effect, the equipment deflection is less than 2mm, and the vibration damping performance meets the design requirements.