Study on vibration characteristics of rotor systems with bolt joints
LIU Zhuoqian1,2,3,CAO Shuqian1,2,3,GUO Hulun1,2,3,LI Liqing1,2,3
1. Department of Mechanics, Tianjin University, Tianjin 300072, China;
2. Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, Tianjin 300072, China;
3. State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Bolt joint structures are widely used in the aero-engine rotor systems. In this paper, the mechanical model of a joint structure is set up and a parametric model of the bilinear moment is given qualitatively. Modal characters and steady response of the rotor system with bolt joint are investigated, while state space theory and numerical method are employed. It is shown that the bilinear moment character has influence on modal characters and steady response at medium rotational speed, especially at the second order critical rotational speed, while it keeps steady and can be linearized at lower and higher rotational speeds. It is also found that pre-tightening force has a large influence on the stability of the rotor system. The increasing of pre-tightening force can intensify the instability of the system, and shorten the range of unstable motion.
刘卓乾1,2,3, 曹树谦1,2,3, 郭虎伦1,2,3，李利青1,2,3. 含螺栓连接转子系统非线性振动特性研究[J]. 振动与冲击, 2016, 35(22): 10-16.
LIU Zhuoqian1,2,3,CAO Shuqian1,2,3,GUO Hulun1,2,3,LI Liqing1,2,3. Study on vibration characteristics of rotor systems with bolt joints. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(22): 10-16.
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