【摘要】 为识别简支梁桥模型的损伤位置,利用振动信号发生器、加速度传感器、信号采集仪和计算机构成信号采集分析系统,分别采集简支钢梁模型在结构完好和损伤2种工况下的加速度响应数据;采用EMD(经验模态分解法)和波形因数结合的方法分析、处理数据;得到梁在2种工况下的波形因数,根据波形因数的变化率即可找到梁的损伤位置.实验结果表明:该方法对简支梁桥模型损伤位置的识别较敏感,能够比较准确地找到损伤位置.更多还原

【Abstract】 To identify the location of the damaged part of a structure is a difficult task for structure health monitoring. To solve it, a system of signal acquisition and analysis consisting of a vibration signal generator, acceleration sensors, signal acquisition and a computer has been established. The acceleration data of a simple supported steel beam model are collected separately under the conditions intact and injury, then data processed by using EMD and shape factor, the damage locations are found by comparing the change of shape factor. Experiment indicates that damage locations are accurately identified.更多还原