【摘要】 在Pro/E和ANSYS软件环境下,分别建立了汽车主减速器弧齿锥齿轮的三维几何模型和动力学模态分析有限元模型,进而对静止状态和高速旋转状态下的齿轮进行了模态分析,得到了各阶固有频率和振型。结果表明,在高速旋转状态下,齿轮由于离心弹性变形而产生"离心刚化效应",从而改变了齿轮的模态特性:随着转速的增加,轮齿离心弹性变形量和各阶固有频率均增大,且某些振型也与静止状态下的不同。更多还原

【Abstract】 The 3D geometric model and FE model for dynamic modal analysis of automotive spiral bevel gears are established with software Pro/E and ANSYS respectively.Then modal analyses on gears in both static state and high-speed rotation state are performed and the natural frequencies and the mode shapes in different orders are obtained.The results show that in high-speed rotation state,the centrifugal stiffening effect occurs due to the centrifugal elastic deformation of gear teeth,leading to the change in modal characteristics of gears.With the rise of rotational speed,the centrifugal elastic deformation of gear teeth and the natural frequency of gears in different orders increase and some of the mode shapes differ from that in static state.更多还原