1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2. Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, E1A-07–03, Singapore 117576, Singapore
3. Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, Zhuhai 999078, China
4. School of Engineering, Brown University, Providence, RI 02912