毕业论文设计管道腐蚀缺陷超声导波检测仿真研究.doc

管道腐蚀缺陷超声导波检测仿真研究 摘要:超声导波检测主要是导波在工件中的传播特性，导波在工件中传播能量会损失，同时，传播过程遇到两种不同的声阻抗时，导波会发生反射。其工作理论是声源产生超声波投入管子，当在管子中传播并与缺陷发生作用，让其传播方向发生改变，被回收设备所接管，并对它进行管理和分析。 超声导波检测技术相对其他检测技术的优势。第一，其传播过程衰减很小，可传播很远的距离；第二，适合长距离管道的大范围检测；第三，对所检测的管道不用做处理，大大降低了检测成本；第四，可同时对管道外观和里面的弊端进行检测。所以，研究超声导波技术在油气管道缺陷检测中的应用具有重要意义和发展前景。 通过超声导波理论对工件侵蚀进行理论性剖析，探讨导波对哪种范例的侵蚀性弊端检出灵敏度更高。并通过ANSYS软件对工件侵蚀举行仿真研究，进一步证明所得出的理论结果。同时仿真研究有着实验所没有的优势，它可以在实验条件不足的情况下进行研究。仿真可以在实验条件不足的情况下完成相关的研究，降低各种损耗。所以在实验不太方便进行的情况下，仿真是一种不错的选择。 关键词：管道腐蚀；超声导波检测技术；仿真 指导老师签名： Simulation Research of ultrasonic guided wave testing of pipeline corrosion defects Student name:xukai class:110813 Teacher:long sheng rong Abstract：Ultrasonic testing group if the propagation characteristics of ultrasonic guided waves in the workpiece,the guided wave propagation early artifacts energy is lost, while the propagation of acoustic impedance of two different encounters that occur guided wave will be reflected.Its working theory is that the ultrasonic sound source input pipe, when Guan Zizhong transmission and interact with defects, to change its direction, was taken over by recycling equipment, and management and analysis. Theoretical analysis of pipeline corrosion by guided wave ultrasonic principle, investigate what type of guided wave corrosion defect detection sensitivity higher。First, the propagation attenuation is very small, can travel long distances and； secondly, suitable for a wide range of long distance pipeline detection ；and third, dont have to do for the detection of pipeline processing, greatly reduces the cost ；Finally, you can simultaneously detect the defects in and appearance。Therefore, the study of ultrasonic guided wave technology in pipeline defect detection is of great significance and development prospects By ultrasonic guided wave theory of the workpiece aggressive conduct theoretical analysis, to explore what kind of paradigm guided wave erosion on the Ab