1. Ph.D. Student, Dept. of Engineering Mechanics, Dalian Univ. of Technology, Dalian 116023, PR China.
2. Professor, Dept. of Engineering Mechanics, Dalian Univ. of Technology, Dalian 116023, PR China (corresponding author).
3. Professor, Dept. of Engineering Mechanics, Dalian Univ. of Technology, Dalian 116023, PR China.
4. Professor, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian Univ. of Technology, Dalian 116023, PR China.