Modal analysis of cracked tower crane with an experimental validation


  • Dang Xuan Trong Occupational Safety and Health Inspection & Training Joint Stock Company733 Xo Viet Nghe Tinh, Ward 26, Binh Thanh Dist., Ho Chi Minh City, Viet Nam
  • Le Khanh Toan nstitute of Mechanics, VAST, 264, Doi Can, Ba Dinh, Ha Noi, Viet Nam
  • Ha Thanh Ngoc Institute of Mechanics and Environment Engineering, VUSTA, 264 Doi Can, Ba Dinh, Ha Noi, Viet Nam
  • Nguyen Tien Khiem Institute of Mechanics, Vietnam Academy of Science and Technology, 264, Doi Can, Ba Dinh, Ha Noi, Viet Nam



Tower crane, cracked structure, modal analysis, dynamic stiffness method


In this paper, dynamic stiffness model of a cracked frame structure that represents a planar tower crane is established in an explicit form based on general solution of cracked 2D-beam element vibration. The crack is modeled by a pair of equivalent springs of stiffness calculated from the crack depth. An explicit form of frequency equation is first established and then solved for numerical sensitivity analysis of natural frequencies of the structure to cracks. An experimental study is accomplished to validate the theoretical development


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How to Cite

D. X. . Trong, L. K. Toan, H. T. Ngoc, and N. T. Khiem, “Modal analysis of cracked tower crane with an experimental validation”, Vietnam J. Sci. Technol., vol. 58, no. 6, pp. 776–788, Dec. 2020.



Mechanical Engineering - Mechatronics