1. State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi’an Jiaotong University, Xi’an, P. R. China
2. Institute for Computational Mechanics and Its Applications (Npuicma), School of Aeronautics, Northwestern Polytechnical University, Xi’an, P. R. China
3. School of Sciences, Chang’an University, Xi’an, P. R. China