1. School of Mechanical & Production Engineering, Nanyang Technological University, Singapore 639798, Republic of Singapore
2. Foshan University, Foshan 528000, Guangdong, P. R. China
3. Institute of Vibration Engineering, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, P. R. China
4. State Key Laboratory of Mechanical Structural Strength and Vibration, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, P. R. China