【摘要】 为提高结构损伤识别的精度,充分发挥小波识别在特征提取、信号奇异性检测、信号降噪等方面的独特优势,提出采用移动质量多次检测法的结构损伤小波识别方法。该方法采用移动质量块在不同位置对桥梁进行多次测量,利用各次测量的频率值的变量来确定桥梁结构的其他模态参数,从而确定桥梁的局部单一和多处损伤情况。采用数值算例对该方法进行验证,结果显示,对简支梁的单一和多处损伤识别效果明显。更多还原

【Abstract】 In order to improve the accuracy of the identification of the structure damage and take the advantages of wavelet analysis which is charactered with feature extraction,the singularity of signal detection,and signal de-noising,the improved method of the moving quality repetitious detection was put forward.In this method,a moving mass is used to measure the structures in different positions.The tested nature frequencies are used as the only index to determine the model parameters,thus identifying the damage of the structures.Moreover,the theoretical model of the proposed method is established and the corresponding equations are deduced.A numerical simulation is finally carried out to verify the effectiveness of the proposed method.更多还原