载重汽车3种结构形式平衡悬架模态分析

Modal analysis on truck balance suspensions in three kinds of structures

为避免因路面振源频率与平衡悬架固有频率一致使平衡悬架系统发生共振,从而导致平衡悬架损伤或破坏的问题,对直式、U形和圆弧弯形载重汽车平衡悬架建模并划分网格,结合车身和平衡悬架的结构参数施加合理的边界条件,分别在有应力和无应力状态下用ANSYS分析3种平衡悬架的前10阶模态.结果表明3种平衡悬架的振动频率可有效避开一般路面的激振频率(1～20 Hz);平衡悬架在有应力和无应力状态下的模态分析结果差别很小.

To avoid injury or damage of balance suspension system aroused by resonance due to the consistency of natural frequency of balance suspension with road vibration frequency,the vertical,U-shape,and arc bending balance suspensions are modeled and meshed,the rational boundary conditions are applied on the models combining with the structural parameters of vehicle body and balance suspensions,the modals of first ten order are analyzed by ANSYS for the three types of balance suspensions under stress effect or without stress.The results show that,the road excitation frequency ranged in 1~20 Hz can be avoided in the three types of balance suspension,and the difference of modal analysis on the three types of suspension in the state of stress and no stress is minor.