1. Department of Mechanical Engineering, Ferdowsi University of Mashhad, P.O. Box 91775-1111, Mashhad, Iran
2. State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics (ICAM), School of Aerospace Engineering, Xi'an Jiaotong University (XJTU), Xianning West Road, Beilin District, Xi'an 710049, China
3. Department of Aerospace Engineering, Sharif University of Technology, P.O. Box 11365-8639, Tehran, Iran