功率四分支闭锁传动系统的固有频率及振型分析

Vibration Analysis of a Dual Power-Split Gear Transmission

为了研究功率四分支闭锁传动系统的动态力学响应,采用集中质量法建立了功率四分支闭锁传动系统的动力学模型.采用轮齿几何接触分析和承载接触仿真分析对时变啮合刚度激励进行了求解.通过数值解法对动力学方程进行求解,得到了系统的固有频率和固有振型.分析结果表明:系统功率分流特性引起固有频率出现四重频现象,且固有频率分布合理,达到设计要求;基频振型曲线的节点23与29之间的相对振幅较其他节点间大.

In order to solve the dynamic mechanical response of the four branch locking transmission system,the dynamic model is established using the lumped mass method.According to the tooth geometry contact analysis （TCA）and loaded tooth contact analysis （LTCA）,the time-varying mesh stiffness is solved.Through solving the dynamics equation,the natural frequencies and natural modes are obtained.The results show： Because of the complexity of the system,the quadruple frequency phenomenon appears,and the distribution of natural frequency is reasonable,which meet the design requirements.The relative amplitude is the largest between the node23 and node29 in the vibration mode curve of the fundamental frequency.The above method provides a theoretical basis and data support for its dynamic performance optimization design.