基于小波能量谱的盾构隧道损伤间接识别  

Indirect identification of shield tunnel damage based on wavelet energy spectrum

作　　者：罗辉[1] 周剑锋[1,2] LUO Hui;ZHOU Jianfeng(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;WISDRI Engineering&Research Incorporation Limited,Wuhan 430223,China)

机构地区：[1]华中科技大学土木与水利工程学院,武汉430074 [2]中冶南方工程技术有限公司,武汉430223

出　　处：《振动与冲击》2022年第23期283-292,共10页Journal of Vibration and Shock

基　　金：国家重点研发计划(2021YFF0501003);国家自然科学基金(52078233,51838006)。

摘　　要：地铁盾构隧道结构的健康服役对城市轨道交通运输的正常运转至关重要。以超长线状盾构隧道为研究对象,结合间接测量法和小波分析方法,提出了一种基于小波能量谱的盾构隧道损伤间接识别方法。建立了移动车辆和盾构隧道耦合振动的有限元模型,对车辆匀速通过盾构隧道的垂向振动加速度响应进行连续小波变换,得到信号能量谱在时间域内分布,构建基于小波能量谱的盾构隧道损伤识别指标。数值算例表明该方法可以准确识别盾构隧道单损伤和多损伤工况,并分析了车速、测量噪声、粗糙度等因素对损伤识别结果的影响。最后通过实验室试验验证了本文所提盾构隧道损伤间接识别方法的有效性。The healthy service of metro shield tunnel structure is very important to normal operation of urban rail transit.Here,taking an ultra-long linear shield tunnel as the study object,combining the indirect measurement method and wavelet analysis method,an indirect identification method for shield tunnel damage based on wavelet energy spectrum was proposed.The finite element model of mobile vehicle-shield tunnel coupled vibration was established.Continuous wavelet transform was done for vertical vibration acceleration response of vehicle passing through shield tunnel at a constant speed to obtain signal energy spectrum distribution in time domain.The damage identification index of shield tunnel based on wavelet energy spectrum was constructed.Numerical examples showed that the proposed method can accurately identify single damage and multi-damage working conditions of shield tunnel;effects of vehicle speed,measurement noise,roughness and other factors on the damage identification results are analyzed.Finally,the effectiveness of the proposed indirect identification method of shield tunnel damage was verified with laboratory tests.

关 键 词：盾构隧道 间接测量法 小波能量谱 损伤识别 车辆响应 

分 类 号：TU375.1[建筑科学—结构工程]