1. Department of Mechanics, School of Aerospace Engineering, Huazhong University of Science and Technology 1 , 1037 Luoyu Road, Wuhan 430074, China
2. Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment 2 , 1037 Luoyu Road, Wuhan 430074, China
3. Department of Mechanical Engineering and Science, Kyoto University 3 , Nishikyo-ku, Kyoto 615-8540, Japan