School of Mechanical Engineering Hubei University of Arts and Science Xiangyang 441053 China;
School of Mechanical Engineering Hubei University of Arts and Science Xiangyang 441053 ChinaState Key Lab of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China;
coordinate transformation; stiffness parameters; dampness parameters; hydrodynamic journal bearings;