电磁超声管道周向兰姆波仿真分析及缺陷检测特性研究  

Research on Simulation Analysis of Electromagnetic Ultrasonic Circumferential Lamb Waves and Defect Feature Detection in Pipeline

作　　者：刘素贞[1] 张严伟 张闯[1] 金亮[2] 杨庆新[1,2] Liu Suzhen;Zhang Yanwei;Zhang Chuang;Jin Liang;Yang Qingxin(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China;Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China)

机构地区：[1]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130 [2]天津工业大学电工电能新技术天津市重点实验室,天津300387

出　　处：《电工技术学报》2017年第22期144-151,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51077036;51307043);河北省自然科学基金(E2016202260);天津市自然科学基金(16JCYBJC19000)资助项目

摘　　要：根据管道周向兰姆波(CLamb波)在管道中对称传播的特点,采用有限元软件仿真分析了管道周向兰姆波的传播特性,得到CLamb0、CLamb1模式沿管道周向传播的规律。在研究兰姆波声场特征的基础上,建立含有槽型缺陷的有限元模型,仿真分析了缺陷两侧周向Lamb波的响应特性,并对周向兰姆波遇到缺陷时的模式转换进行了仿真分析,得出缺陷深度和埋深与反射波幅值、透射波幅值的关系,为管道裂纹缺陷的定量检测奠定了基础。最后,对铝材管道中两种不同深度的缺陷进行了实验研究,证明了仿真分析的正确性和有效性。According to the symmetrical characteristics of pipeline circumferential Lamb waves （CLamb waves）, the propagation characteristics of CLamb waves were studied by finite element simulation and the propagation regularities of CLamb0 and CLamb1 mode were obtained. Based on the research of Lamb acoustic field characteristics, the pipeline model with rectangular flaw was established. The characteristics of CLamb waves extracted on both sides of the defect were simulated. Meanwhile the mode conversion of the CLamb waves because of the impact of the defect was studied. The relationships between the flaw size, depth and the amplitude of the reflection and transmission waves were obtained, which laid a foundation for quantitative test of pipe crack defects. Finally, experiments detecting the aluminum pipeline with different defects were conducted to verify the results of FEM.

关 键 词：周向兰姆波(CLamb波) 有限元仿真 缺陷响应特性 模式转换 

分 类 号：TB553[理学—物理]