Modal Analysis of Tower Crane with Cracks by the Dynamic Stiffness Method

• Published in: Topics in Modal Analysis & Testing, Volume 10 pp. 11 - 22
• Main Authors: Trong, Dang Xuan, Khiem, Nguyen Tien
• Format: Book Chapter
• Language: English
• Published: Switzerland River Publishers 2017; Springer International Publishing AG; Springer International Publishing
• Edition: 1
• Series: Conference Proceedings of the Society for Experimental Mechanics Series
• Subjects: CIVIL ENGINEERING, SURVEYING & BUILDING; Cracked structure; Dynamic stiffness method; Dynamics & vibration; Mechanical engineering; Modal analysis; Tower crane; Tower crane; Cracked structure; Modal analysis; Dynamic stiffness method
• ISBN: 3319548093; 9783319854892; 3319854895; 9783319548098
• ISSN: 2191-5644; 2191-5652
• DOI: 10.1007/978-3-319-54810-4_2

The dynamic stiffness method is a powerful approach that enables to obtain more exact solution in dynamic analysis of structures, especially, when high frequency vibrations need to be investigated. On the other hand, the dynamic characteristics of high frequency modes of a structure are more sensitive to local damage such as crack. Therefore, the dynamic stiffness method gets to be a most efficient approach to analysis and identification of engineering structures. This report is devoted to modal analysis of tower crane with cracks by using the dynamic stiffness method. First, dynamic stiffness model of tower crane is conducted on the base of cracked beam element where crack is treated by an equivalent spring. Then, the established model is used for modal analysis of a typical tower crane.