【摘要】 基于对某框架结构的已有研究,建立有限元数值模型,对其自振频率、振型进行计算,并通过与已有试验数据分析,验证了数值模型的准确性;然后,系统选取了相关的9个参数,对其在损伤识别过程中的特征进行了归类、分析,得到了曲率模态类参数识别效果优于位移模态类、斜率模态类参数的结论,并分析了其原因;在此基础上,总结了较理想参数的一般特征。其中,对相关参数的系统分析,以及对理想参数识别特征的总结,都有一定的理论、实际意义。更多还原

【Abstract】 The natural frequencies of a frame structure were calculated based on a finite element model, which agree well with the experiment data. The analysis of damage identification process was performed with parameters changing. Nine parameters were chosen to identify the damage conditions, which could be classified into three types. The identification process of each parameter was analyzed, and their common characters were summarized. It is found that the effect of the identified parameters based on curvature modes is better than that based on displacement or slope modes, the reasons of which were discussed. Three common characters of the proper parameters were obtained. Advises were proposed on the proper parameters selection for frame damage identification.更多还原