含齿根裂纹故障的平行轴齿轮箱动力学特性研究

Dynamic characteristics of parallel shaft gearbox with tooth root crack failure

针对平行轴齿轮箱中齿轮裂纹故障问题,从动力学角度出发,对齿轮啮合刚度、扭振模型、刚柔耦合模型、齿轮啮合力、箱体输入轴节点角加速度及对应频谱等方面进行了研究。对带有齿根裂纹的齿轮箱的扭振与动力学进行了联合仿真,提出了一种基于Bartelmus的扭转振动模型,以及刚柔耦合动力学的分析方法;利用ADAMS、ANSYS建立了以箱体和带齿根裂纹的齿轮为主要研究对象的齿轮箱刚柔耦合模型;通过仿真得到了健康和齿根裂纹故障的轮齿啮合力和角加速度响应曲线,提取了箱体输入轴端节点1 s内垂直方向的加速度信号,将其导入传动系统动力学方程中,计算得到了目标齿轮的垂直方向加速度频谱,并通过实验进行了验证。研究结果表明:该方法能很好地模拟现实齿根裂纹存在齿轮箱体输入轴端的加速度时域频域响应,对齿轮齿根裂纹故障的动力学响应准确、可靠性高。

Aiming at the gear crack failure in parallel shaft gearbox,the meshing stiffness,torsional vibration model,rigid-flexible coupling model,gear meshing force,box input shaft node angular acceleration and corresponding spectrum were studied from the perspective of dynamics.With root crack of gear box of torsional vibration and the dynamic analysis of the joint simulation,a kind of Bartelmus torsional vibration model and the coupled dynamic analysis method were put forward.Using ADAMS and ANSYS to establish case and take root crack of gear as the main research object,the gear box of the coupled model was obtained by simulation health and tooth root crack fault of tooth contact force and Angle acceleration response.Extraction box input shaft end node 1 s in vertical direction of the acceleration signal,import transmission system dynamics equation in the vertical direction of the target gear acceleration spectrum was calculated,and through the experimental verification.The results show that this method can well simulate the time-domain and frequency-domain response of acceleration at the input shaft of gear box with root crack,and the dynamic response to root crack fault is accurate and reliable.