1. State Key Laboratory of Mechanical Structural Strength and Vibration, School of Mechanical Engineering, Xi'an JiaoTong University, Xi'an, People’s Republic of China
2. School of Mechanical Engineering, Xiangtan University, Xiangtan, People’s Republic of China
3. State Key Laboratory of High Performance Complex Manufacturing, School of Mechanical and Electrical Engineering, Central South University, Changsha, People’s Republic of China
4. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, People’s Republic of China
5. Key Laboratory of Education Ministry for Modem Design and Rotor-bearing System, Xi’an Jiaotong University, Xi'an, People’s Republic of China