1. College of Aerospace Engineering, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing Univ. of Aeronautics and Astronautics, No. 29 Yudao St., Nanjing 210016, China.
2. Professor, College of Aerospace Engineering, State Key Laboratory of Mechanics and Control for Aerospace Structures, Ministerial Key Discipline Laboratory of Advanced Design Technology of Aircraft, Nanjing Univ. of Aeronautics and Astronautics, No. 29 Yudao St., Nanjing 210016, China (corresponding author).