基于ANSYS的压气机叶轮振动特性有限元仿真分析

车用涡轮增压器的压气机叶轮常常因为振动而导致破坏,对压气机叶轮进行模态分析是避免叶轮与激振频率发生共振的常用手段,能有效避免因发生共振而导致的叶轮破坏问题。利用AN-SYS软件,采用子结构分析方法对压气机叶轮的中低阶固有频率进行了数值仿真计算,获得了不同转速和不同节径时的频率,并根据计算结果绘制了Campbell图,找出了与压气机叶轮固有频率产生共振的转速,为压气机叶轮的优化设计提供了依据,同时说明采用子结构分析的方法可以较精确地获得整体模型的低阶固有频率解。

Vibration characteristic simulation and analysis of compressor impeller based on finite element

The compressor impeller of the automotive turbocharger is often damaged by the vibration,while model analysis for the compressor impeller is a kind of common means to avoid resonance between the impeller and natural frequency,which can effectively avoid the damage caused by the resonance.Based on the software of ANSYS,the mid and low order nature frequency was simulated and calculated by the method of substructure,and the frequency of different speed and different nodal diameter were obtained.In addition,Campbell chart was drawn according to the results to find the resonance speed of the compressor impeller,which provided reference for optimal design of the compressor impeller.At the same time,the method of substructure was proved to be able to obtain accurately the low order natural frequency of whole model.