基于机械共振的简支梁裂纹识别  

The Simple Supported Beam Crack Identification Base on Mechanical Resonance

作　　者：郑嘉鹏[1] 尹承平[1] 

机构地区：[1]华南师范大学,广东广州510006

出　　处：《大学物理实验》2012年第3期18-20,共3页Physical Experiment of College

基　　金：国家自然科学基金项目(11104086);广东省自然科学基金项目(S2011040001908);响石基金资助

摘　　要：裂纹检测是结构损伤识别的重要研究方向。将裂纹简支梁模拟为由扭转弹簧连接两弹性梁而成的连接体,从而可定量获得可能的裂纹参数。根据裂纹使得局部刚度减小,局部应力集中的现象,分析比较裂纹梁在不同点集中荷载下的最大挠度,定性定位损伤。Crack detection is an important research area on Structural Damage Identification. It can ob- tain the result about the crack parameters quantificationally, by using this system of torsional spring. According to the phenomenon of the decreasing local rigidity and the centralized local stress, we can o- rient the damage location accurately through analysis comparison about the maximum deflection after concentrated load acting on different points.

关 键 词：裂纹 机械共振 扭转弹簧 集中荷载 

分 类 号：TH113[机械工程—机械设计及理论]