摘要
由于堆石坝的面板裂缝对其结构安全的影响较大,需要加强对混凝土面板裂缝的识别和定位。为进一步提高面板裂缝的定位精度,提出了一种混凝土面板裂缝声发射传感器监测网络布设结构,并基于定位可靠度对已知恒定波速时差法(Geiger法)进行改进,得到基于区域修正波速的时差定位法(IGeiger法)。同时利用自适应学习策略(Adaptive learning strategies)和混沌映射(Chaotic map)改进天牛群优化算法(Beetle Swarm Optimization Algorithm,BSO),进而提出了一种自适应混沌天牛群算法(AC-BSO),并采用该算法计算裂缝定位目标函数的最优解。由试验结果可知:最小二乘法和天牛须搜索算法定位精度不稳定,定位效果明显劣于AC-BSD-IGeiger组合算法,说明该算法能有效提高声源定位精度。研究成果可为面板裂缝定位提供新的解决思路。
Due to significant influences of slab cracks on the structural safety of rockfill dams,it is necessary to strengthen the identification and localization of concrete slab cracks.To further improve the positioning accuracy of slab cracks,we propose a layout structure for monitoring sensor network of acoustic emission produced by concrete slab cracks,and improve the constant wave velocity time difference method(Geiger method)based on positioning reliability,so as to propose the region corrected wave velocity time difference positioning method(IGeiger method).At the same time,a self-adaptive learning strategy and Chaotic map were used to improve the Beetle Swarm Optimization Algorithm(BSO),so an adaptive learning algorithm(AC-BSO)was proposed to calculate the optimal solution of the objective function of crack localization.According to the experimental results,the Least Square(LS)method and Beetle antennae search(BAS)algorithm have unstable positioning accuracies,and the positioning effect is significantly inferior to the AC-BSO-IGeiger method,demonstrating that the proposed method is effective in improving positioning accuracy of acoustic sources.The results can provide a new solution for slab crack recognition.
作者
景茂贵
刘星
何启
JING Maogui;LIU Xing;HE Qi(China Three Gorges Construction Engineering Corporation,Chengdu 610041,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Pearl River Water Resources Research Institute,Guangzhou 510610,China)
出处
《人民长江》
北大核心
2025年第2期175-182,共8页
Yangtze River
基金
国家自然科学基金联合基金项目(U2243223)
江苏省水利科技项目(2022024)。
关键词
混凝土面板
裂缝识别
声发射
天牛群优化算法
时差定位法
concrete slab
crack identification
acoustic emission
beetle swarm optimization algorithm
time difference positioning method
作者简介
景茂贵,男,高级工程师,硕士,主要从事水电工程建设管理及研究工作。E-mail:jing_maogui@ctg.com.cn;通信作者:刘星,男,工程师,博士,主要从事水电工程建设管理及大坝结构研究工作。E-mail:liu_xing6@ctg.com.cn。
