【摘要】 介绍了经验模态分解法(EMD)的原理及波形指数的概念。为研究桥梁结构的健康监测问题,对某一简支梁桥模型进行试验研究。采用正弦波定频激振,利用信号采集系统采集加速度响应,综合应用希尔伯特-黄变换(HHT)中的经验模态分解部分和波形指数较好地识别出了该简支梁桥模型的损伤位置,并提出了该方法的需改进之处。更多还原

【Abstract】 The principle of empirical mode decomposition (EMD) and concept of shape factor are introduced. In order to study bridge health monitoring, a model of a simple supported beam is studied. Excitation is provided by sinusoidal source whose frequency is stable, the signals of acceleration response are collected by signal acquisition system, and the damage location of the model is identified perfectly in virtue of cooperating EMD which is part of HHT with shape factor. Finally, the further improvements of the method are put forward.更多还原