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基于EMD的应变重构方法实验分析

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摘要 在实际工程中,需要对某些关键部位进行实时监测,然而,由于结构自身特点或者基于系统的整体性能,并不能在该处布贴相应的传感器。基于此,提出一种基于EMD的应变重构方法,旨在研究关键部位在不能布贴传感器的前提下的结构健康监控。采用光纤布拉格光栅作为应变传感器进行数据采集,将应变信号进行经验模态分解后,结合对悬臂梁的有限元分析结果,通过推导得到的转换方程实现模态转换,最后通过模态叠加得到关键部位的重构应变数据。在实验部分,以铝合金悬臂梁为实验模型,通过采集不同位置点的应变数据来重构关键部位的数据,以分析重构结果的有效性和准确性。
作者 韩大利
出处 《机电信息》 2015年第33期150-151,共2页
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