【摘要】 研究了受非稳态油膜力作用的非对称转子系统的碰摩特性。利用数值积分和Po incare映射方法对系统的碰摩运动进行数值模拟研究,得到了系统随转速变化发生碰摩的分岔特性,并与不考虑碰摩力时的分岔特性进行了比较,发现碰摩区的出现与临界转速和油膜力特性有关,揭示了碰摩对非稳态油膜力作用下的非对称转子系统特性的影响。同时可以看到,碰摩转子系统存在阵发性、拟周期和倍周期分岔三条通向混沌的道路。更多还原

【Abstract】 The response of a impact-rubbing asymmetrical rotor with unsteady oil film force is analyzed in the paper.The bifurcation behavior of the impact-rubbing rotor system varying with the rotation speeds is obtained using numerical integration and Poincare mapping method.The numerical results are compared with that given without impact-rubbing.We found that the impact-rubbing regions are related with the critical rotation speed and the characteristic of the oil film.Moreover,it was found that there are three routes leading the response to chaos,intermittence to chaos,quasi-period to chaos and double period to chaos.更多还原