基于HyperMesh的电主轴系统动态性能建模与仿真

Electric Spindle's Dynamic Performance of Modeling and Simulation with HyperMesh

振动对电主轴的性能影响重大,直接关系到能否实现高速化与精密化。针对该问题,以某型电主轴为研究对象,采用多体传递矩阵法对电主轴的某些参数进行简化与确定,在此基础上采用有限元仿真方法建立电主轴仿真模型,并使用仿真软件Hypermesh进行Optistruct器件的振动仿真,以确定系统的振动特性。再对电主轴系统的两种结构方案进行有限元仿真,结果得到了整个电主轴系统的前6阶固有频率及振型图,并据此对电主轴系统提出了综合性分析。其结果为进一步的动态特性优化、避免共振提供了依据,从而提高电主轴工作精度,也为电主轴的结构选型作出了重要贡献。

Vibration which directly relates to the ability to achieve high speed and precision has a great impact on the performance of spindle.For the problem,a certain type of spindle was used as the study object and the transfer matrix method to simplify and determine some parameters of the spindle system.On this basis,finite element simulation method was used to establish the spindle model and simulation software Hypermesh was used to conduct the vibration simulation of the optistruct device in order to determine the vibration characteristics of the spindle system.Two kinds of the electric spindle’s structural projects were used to do finite element simulation.The simulation results get the first six-order natural frequencies and mode shapes diagram of the whole spindle system and a comprehensive analysis of the spindle system can be proposed.The simulation results calculated provide a basis for further optimization and avoiding resonance,and thus improve the working precision of the spindle,and also make important contributions to the structure of the electric spindle’s selection.