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针对管道防腐层的破损问题,研究了超声导波在双层介质中的传播速度和能量衰减,提出一种基于超声导波传播特性的管道防腐层剥离检测方法。采用有限元仿真构建钢板模型和耦合有机玻璃板的钢板模型,在两种模型下进行受力振动,分析超声导波传播速度的变化。搭建实验平台,通过实验验证理论和仿真结果。结果表明,超声导波在耦合有机玻璃板的钢板中比在裸钢板中的传播速度小、能量衰减快。
Aimed at the problem of pipeline coating damage, the propagation speed and energy attenuation of ultrasonic guided wave in double-layer media are studied. A method based on the propagation of ultrasonic guided wave is proposed. The steel plate model and the steel plate model coupled with the plexiglass plate are constructed by using the finite element simulation, and the force vibration is conducted under the two models to analyze the change of the ultrasonic guided wave propagation velocity. Build an experimental platform, through experimental verification theory and simulation results. The results show that the ultrasonic guided waves in the coupling of plexiglass plate steel than in the bare steel propagation speed is small, the energy decay fast.