摘要
分析了无损和损伤状态下悬臂梁振动测试信号,提出了一种基于模型系数变化的结构损伤检测方法。根据悬臂梁振动测试数据,建立了自回归滑动平均(ARMA)模型,导出模型系数与结构固有特性之间的关系,并将各种状态下的AR模型系数进行比较,通过系数的变化来判断结构是否出现损伤。实验结果表明,该方法是可行和有效的。
Proposes a method of structural damage detection based on varying model coefficient by analyzing the test signal of cantilever vibration in conditions of nondestructive and injury. With the test data of cantilever vibration, sets up the model of ARMA （auto model coefficients and the structural inherent conditions, and judges whether the structure is regressive moving average）, derives the relationship between the characteristics, compares the AR model coefficients in various damaged by the coefficients of variation. Experimental result shows that the method is feasible and effective.
出处
《煤矿机电》
2009年第4期71-72,75,共3页
Colliery Mechanical & Electrical Technology
基金
山西省自然科学基金资助项目(编号:2008011043-2)
