预应力对汽车减震器固有频率的影响

为避免汽车减震器在工作中与汽车车身共振而使车内产生异响,运用Solidworks软件进行汽车减震器三维建模,通过hypermesh进行网格划分,使用ANSYS-workbench对汽车减震器进行自由模态和预应力模态分析,得到汽车减震器在自由模态和预应力模态下的固有频率和振型等振动特性,并对结果进行对比分析。研究结果表明:预应力模态更能真实反映汽车减震器在工作过程中的振动特性,而且根据对其频率的分析,可以使汽车减震器工作时避开共振区间,避免车内产生异响。

Effect of Prestress on Natural Frequency of Automotive Shock Absorber

In order to prevent abnormal noise caused by car shock absorber from resonating with the car body in working state,the solidworks to model the car shock absorber in three dimensions were used first.Meshing through hypermesh was then carried out.By ANSYS-workbench,free vibration mode and the prestressed mode were analized to abtain the vibration characteristics of atural frequency and vibration mode of the automobile sseshock absorber in the free mode and the prestressed mod.Finally the whole comparision and analysis works were conducted on all the results.The research results show that the prestressed mode better reflects the vibration characteristics of the automotive shock absorber during the operation,and that the automotive shock absorber,according to the analysis of its frequency,is able to avoid the resonance interval in car operation and prevent the occurrence of different ring.