【摘要】 利用小波多分辨分析的特性,研究结构不同位置加速度响应信号对损伤的敏感性问题。通过对一个5层框架结构在不同损伤工况下的数值计算结果表明,不同位置的加速度传感器表征结构损伤特性的能力是不同的,每一传感器只能描述其附近区域结构的工作状态。如果仅利用某一个或者某一些传感器信息进行损伤诊断,就有可能导致错误的诊断结论。只有综合利用多传感器的数据信息,才能使损伤识别更具全局性,才可能准确地识别出结构损伤的发生。更多还原

【Abstract】 By using wavelet multi-resolution analysis,different acceleration responding signals from different locations of the structure are studied in this paper.Through numerical analysis of a five-layer frame structure,the result shows that the sensors in different location bear different capability in denoting the damage signal.Each sensor could only denote the working status of the surrounding area.Single or some of the sensors may lead to false diagnostic results.It can be concluded that multi-sensors with data fusion method is the effective way to solve the problem of limited information by single sensor.更多还原