高速旋转状态下的齿轮非线性模态分析

The nonlinear modal analysis of high-speed revolving gear

建立齿轮在高速旋转状态下的三维有限元分析模型,模拟某履带车辆传动系统齿轮旋转过程的实际工况,进行非线性模态分析,精确计算其在高速旋转时的应力-应变特性,得到齿轮非线性低阶固有频率和主振型,并通过与静止状态下分析得到的固有频率进行对比分析,所得结果既反映了动力学性能,又为系统的进一步动力学修改、噪声控制以及优化设计提供了有力的依据。

The precise Finite Element Method（FEM） modeling is obtained and the actual work condition of high-speed revolving gear of the track vehicle transmission system is simulated. The FEM is used to analyze nonlinear modal and investigate the stressstrain characteristic, the natural frequency and the nonlinear major shapes of high-speed revolving gear. And the results are compared with the frequency obtained by static analyzing. The conclusions have indicated the dynamics performance of the gear and given powerful evidence for the more dynamical modification, noise control and the optimizing design in the transmission system.