带挤压油膜的裂纹转子非线性响应特性分析

本文研究了支承在挤压油膜阻尼器上的裂纹转子系统的非线性动态响应特性。研究结果表明 :油膜力可以有效地抑制非协调响应 ,而且轴承参数的增大 ,可以抑制混沌运动。在较小的轴承参数下 ,转速比、裂纹深度等参数的变化会导致系统产生非协调响应 ,而且随裂纹深度的增加 ,响应会进入周期阵发性混沌。阻尼比的增大可以使运动锁相到周期解上。周期 3解的出现 ,往往意味着混沌运动。系统的响应主要是由阵发性和拟周期进入混沌的

Nonlinear Response Characteristics of Cracked Rotor Supported on Squeeze Film Dampers

In this paper,the nonlinear responses of cracked rotor system supported on squeeze film damper (SFD) are studied.The results show that the squeeze film force can depress non synchronous response effectively and the increase of squeeze film bearing parameter can depress chaotic response.When bearing parameter is small,a certain range of rotating speed and crack depth can lead the system response to non synchronous response and the system response will become chaotic with the increase of crack depth.The system response can be fixed to stable periodic movement by increasing the damping ratio.In general case,peroid 3 movement means that the response will be chaotic.The main route for system response going to chaos is the route of intermittence to chaos and another route is from quasi periodic response to chaos.