1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; Institute of Design Science and Basic Components, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; Institute of Design Science and Basic Components, School of Mechanical Engineering, Design Science and Basic Components, Xi'an Jiaotong University, Xi'an 710049, China