基于ANSYS的电动汽车框梁组件动力学分析

Dynamic Analysis for Frame Beam Components of Electric Vehicles Based on ANSYS

电动汽车设计有框梁组件,用于固定动力总成及相应高低压附件。相对于传统车,电动汽车动力总成及工况都有所不同。分析电动汽车的高压电气架构,对框梁的搭载部件重力以及受力工况进行统计和评估,建立动力学分析的约束和边界条件,利用ANSYS软件作谐响应和随机振动分析,找出框梁的振动参数,在设计过程中为规避结构疲劳、共振等不良影响提供依据。得到了在10~1 000 Hz正弦载荷和随机振动工况下,框梁的响应曲线和应力应变云图。结果表明:最大应力应变低于结构的设计强度,有一定的优化空间。

Electric vehicles are designed with frame beam components for fixing power assemblies and corresponding high and low voltage accessories.Compared to traditional vehicles,electric vehicle power assemblies and operating conditions are different.The high-voltage electrical architecture of electric vehicles was analyzed.The weight of the frame-mounted beam components and stress conditions were counted and evaluated.The constraints and boundary conditions for dynamic analysis were established.ANSYS software was used to make harmonic responses and random vibration analysis.The vibration parameters of the frame beam were found out,which provided a basis for avoiding adverse effects such as structural fatigue and resonance during the design process.Under 10~1000 Hz sinusoidal load and random vibration conditions,the response curve and stress-strain cloud diagram of the frame beam were obtained.The results show that the maximum stress and strain are lower than the design strength of the structure and there is space for optimization.