1. College of Science, Chang'an University, Xi'an 710064, China
2. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
3. School of Mechanics, Civil Engineering and Architecture, and MIIT Key Laboratory of Dynamics and Control of Complex Systems, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
4. Key Laboratory of Mechanics on Disaster and Environment in Western China Attached to the Ministry of Education of China, and Department of Mechanics and Engineering Sciences, Lanzhou University, Lanzhou 730000, China