基于振动的简支梁裂纹损伤识别研究

针对传统损伤检测对早期裂纹不敏感的问题,研究了基于振动的裂纹损伤检测。文中对简支梁的裂纹损伤进行了理论分析、数值模拟和实验研究,结果表明简支梁的各阶模态频率随着裂纹深度的的增加而减小,证实了基于模态频率检测裂纹损伤的可行性,为损伤的早期检测提供了依据。

Vibration-based Damage Detection for Crack Simply Beam

In view of the traditional problems of damage detection is not sensitive to early crack, crack damage detection based on vibration is studied. In this paper, the theory analysis, numerical simulation and experimental research have been carried on the crack simply beam. The results show that the modal frequency of the crack simply beam decreases with the increase of the crack depth, confirms the feasibility of crack damage detection based on modal frequency, provides the Basis for the early detection of injury.