论文部分内容阅读
针对金属板厚度测量问题,研究了电磁超声波在金属板中的传播特性,根据有限元理论,利用ANSYS有限元分析软件对金属板测厚换能器进行了仿真分析。建立了测厚换能器的三维模型,对模型进行了电磁分析和电磁结构耦合分析。分别得出了被测试件内感生出的涡流和受到的洛伦兹力以及被测试件内部受到的位移情况。仿真结果表明,被测试件内质点受到的洛伦兹力方向为向下,且线圈正下方的洛伦兹力最大;通过不同时刻质点位移的变化可以直观地观察出电磁超声波在板中的传播状况;通过对单个质点位移的分析得出了该模型产生的电磁超声波的质点位移最大方向是向下的;该模型产生的超声波是向下的,可用于模拟电磁超声的测厚情况。
Aiming at the problem of thickness measurement of metal plate, the propagation characteristics of electromagnetic ultrasonic in metal plate are studied. According to the finite element theory, the finite element analysis software of ANSYS is used to simulate the thickness measurement transducer of metal plate. A three-dimensional model of thickness measurement transducer was established. The electromagnetic analysis and electromagnetic structure coupling analysis of the model were carried out. The eddy currents and the Lorentz force induced in the test piece and the displacement inside the test piece are obtained respectively. The simulation results show that the Lorentz force exerted by the particle in the test piece is in the downward direction and the Lorentz force directly below the coil is the maximum. The propagation of the electromagnetic ultrasonic wave in the plate can be directly observed through the change of particle displacement at different times By analyzing the displacement of a single particle, it is found that the maximum displacement of the mass point of the electromagnetic ultrasonic wave generated by the model is downward. The ultrasonic wave generated by the model is downward and can be used to simulate the thickness measurement of electromagnetic ultrasonic.