关键词: 转子系统 , 　复杂温度外场 , 　振动响应 , 　有限元法

Abstract: The rotor system often operates in the harsh conditions of high speed, temperature and pressure and its force is very complex. The dynamics model of the rotor system with multi degree of freedom was established by using the finite element method. The vibration modes and the effect of rotor support stiffness on critical speed of the rotor system were studied. Moreover, the comparisons of unbalance response in considering and ignoring the complex temperature for the rotor were employed. The results show that he rotor system response amplitude increased significantly when the complex the temperature field is considered. With the start-up time increases, the amplitudes of the rotor system are gradually increased. When the start time exceeds 15 s, the amplitude is increased almost linearly.

Key words: Rotor system , Complex temperature field , Vibration response , Finite element method