Effect of Crack on Dynamic Characteristics of Simple Supported Beam

2018 4th International Conference on Mechanical Engineering and Automation Science

机械制造;原子能学

Zhao, Xueyan^1 ; Du, Weikang^1 ; Cao, Chao^1 ; Chen, Yifan^1 ; Yin, Lijuan^1

College of Engineering, China Agricultural University, Beijing

100083, China^1

关键词: Crack damage;    Crack location;    Detection and localization;    Dynamic characteristics;    Practical engineering;    Simple supported beams;    Simulation studies;    Vibration model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/470/1/012041/pdf
DOI  :  10.1088/1757-899X/470/1/012041

来源: IOP

【 摘 要 】

Simple supported beam is extensively applied in practical engineering structure. Crack is a common damage in simple supported beam and has greatly influences on the dynamic characteristics of the system. In this study, effect of crack on dynamic characteristics of simple supported beam is studied. The model of simple supported beam with crack damage is established by finite element (FE) method firstly. Then, effect of crack location and crack depth on dynamic characteristics of the simple supported beam is studied by comparison with the case when no crack occurs. Results of simulation studies conclude that crack with different location and depth will change natural frequencies differently and the effects of crack location on natural frequencies are related to the vibration model of the simple supported beam. This conclusion provides a good reference for simple supported beam structure performance optimization, damage detection and localization.