第三代轮毂轴承单元法兰内圈不同减重结构的模态分析

Modal Analysis on Different Weight Reduction Structures for Flanged Inner Rings of Third Generation Hub Bearing Units

为研究第三代轮毂轴承单元法兰内圈减重对约束模态频率的影响,基于有限元方法对法兰减重状态的法兰内圈进行约束模态分析,对比分析不同结构法兰内圈的约束模态频率和振型,并通过试验和仿真对比约束模态频率和振型。结果显示法兰减重对约束模态频率影响较小;法兰内圈的约束模态频率比车轮怠速频率和路面与车轮的激励频率高7000 Hz以上,有效避免了共振,但法兰减重较大的情况下法兰部位的振型也受到一定的影响,在后续进行减重时要注意保证法兰的刚度。将试验结果与仿真结果进行对比后发现,二者相差不大。

In order to study the effect of weight reduction of flanged inner rings of third generation hub bearing units on frequencies of constrained modes,the constrained modal analysis of flanged inner rings under weight reduction state of flanges is conducted based on finite element method.The frequencies and vibration modes of constrained modes for flanged inner rings with different structures are compared and analyzed,and the frequencies and vibration modes of constrained modes are compared by experiments and simulations.The results show that the weight reduction of flanges has little effect on frequencies of constrained modes;the frequencies of constrained modes for flanged inner rings is more than 7000 Hz higher than idle frequencies of wheel and excitation frequencies between road surface and wheel,which avoids the resonance effectively,but the vibration modes of flanges are also affected to a certain extent when the weight of flanges is greatly reduced,and the stiffness of flanges should be ensured during subsequent weight reduction.Through comparison between experimental results and simulation results,it is found that there is little difference between them.