Using this kind of bearing , we finish the spin test at 67000rpm . also , we add the controlled passive magnetic damper ( cpmd ) to the rotor tester , which is used to reduce the vibration the main achievements are as follows : 1 . we analyzed dynamic characteristic of nr15 rotor with long shaft , and get its critical - speed and response to unbalanced mass 本课题的研究,我们做了以下工作: 1对nr15带柄转子的动力学特性做了分析,得到了不同刚度支承下,转子各阶临界转速及相应振幅参数;并在原有超速试验台基础上,通过设计上、下弹性阻尼支承结构,实现了nr15带柄转子67000rpm的超速试验。