支承在挤压油膜阻尼器上的裂纹转子的非线性响应及通向混沌的道路

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

Chaotic Response of Cracked Rotor Supported on Squeeze Film Damper and the Routes to Chaos

In this paper, the chaotic response of a rotor system with crack supported on the squeeze film damper (SFD) is studied. Baesd on the short bearing approximation and π-film assumption, the film force is expressed as a function of speed and displacement of the bearing in the X and Y directions. The result shows that the film force can suppress the non-synchronous response effectively if an SFD is designed well. The increase of the bearing parameter can suppress chaos. When the bearing parameter is small, a certain range of the rotating speed and crack depth can lead to chaos. The main route to chaos is intermittence chaos. There also exists the route of a quasi-period to chaos. In most cases, peroidic-3 movement means that there is or will be a chaotic response.