中文摘要：

Sun Ye-bei is now a graduate student in School of Mechanical and Electrical Engineering, Lanzhou University of Technology. His research interest is fault diagnosis of rotating machinery, sunyebei@ foxmail.com Zhao Rong-zhen is a professor in School of Mechanical and Electrical Engineering, Lanzhou University of Technology. Her research interests include fault diagnosis of rotating machinery and multi-body system dynamics. zhaorongzhen@ lut.com Tang Xiao-bin is now a graduate student in School of Mechanical and Electrical Engineering, Lanzhou University of Technology. His research interests include multi-body system dynamics, lygsyb@ qq.com