基于HyperView的动力包模态贡献量研究

Research on Modal Contribution of Power Pack Based on HyperView

文章以内燃动车组动力包为研究对象,基于HyperMesh软件建立了动力包的有限元模型并进行了模态和频响分析。结合模态和频响分析结果,在HyperView软件的NVH模块中对测点振动位移和速度的模态贡献量进行了分析,确定了动力包在不同转速工况下框架动反力和柴油机振动烈度的模态贡献量。分析结果表明,转速变化对柴油机振动烈度的模态贡献量影响很小,各转速下第4阶的模态贡献量最大;对框架动反力的模态贡献量影响较大的模态是第9阶和第17阶。通过对模态贡献量进行分析,得到了影响动力包结构振动的主要模态,可为工程中的振动问题提供有效的解决方法和新思路。

Taking the power pack of DMUs as the research object,its finite element model is established based on HyperMesh software to conduct modal and frequency response analysis.Combined with the above analysis results,the modal contributions of vibration displacement and velocity at the measuring points are analyzed in NVH module of HyperView software,and the modal contributions of dynamic reaction force of frame and vibration intensity of diesel engine are determined for the power pack under different speed conditions.The analysis results show that the change in speed has little effect on the modal contribution of diesel engine vibration intensity,with the 4th order modal contribution being the largest at each speed;the modal contribution of the dynamic reaction force on the frame has a large impact on the 9th and 17th orders.Through the analysis of modal contribution,the main modes that affect the vibration of power pack structure are obtained,which can provide effective solutions and new ideas for vibration problems in engineering.