应用移动质量法的结构损伤小波识别方法

英文篇名：Damage Identification by Applying the Moving Mass Method and Wavelet Analysis
中文刊名：交通科技
英文刊名：Transportation Science & Technology
作者：王雪峰 ; 董魁 ; 余青松 ; 殷亮
英文作者：Wang Xuefeng1 ; Dong Kui1 ; Yu Qingsong2 ; Yin Liang3(1.China Communication North Road and Bridge Co.Ltd. ; Beijing 100024 ; China ; 2.Engineering Consulting Company of China Railway Siyuan Survey and Design ; Wuhan 430063 ; China ; 3.Jiangsu Province Communication Planning and Design Institute Co.Ltd. ; Nanjing 210005 ; China)
中文关键词：损伤识别 ; 移动质量多次检测法 ; 小波变换 ; 固有频率
英文关键词：damage identification ; method of moving quality repetitious detection ; wavelet analysis ; natural frequency
出版日期：2010-02-28
机构：中交路桥北方工程有限公司;武汉铁四院工程咨询公司;江苏省交通规划设计院有限公司;
年：2010
期：01
出版单位：交通科技

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。
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.

引文

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