| 吴迪,韦小鹤,毕 超,张博南,王亚平,滕永平.在线超声检测系统中螺旋线圈换能器的应用*[J].,2021,40(3):329-334 |
| 在线超声检测系统中螺旋线圈换能器的应用* |
| Application of the spiral coil electromagnetic acoustic transducer in online ultrasonic testing system |
| 投稿时间：2020-08-08 修订日期：2021-04-28 |
| 中文摘要: |
| 针对在线车轮超声检测系统的工程应用，研究了圆形螺旋线圈电磁超声换能器由洛伦兹力换能机制在钢中产生的辐射声场。给出了涡流、等效表面力源和辐射声场的计算方法，分析了圆形螺旋线圈换能器在钢试块上的辐射指向性。结果表明，辐射的圆周径向偏振横波为两边瓣中空指向性，对理解圆形螺旋线圈换能器的辐射声场和在重载货车车轮轮辋在线辋裂缺陷检测中的工程应用具有一定的指导意义。 |
| 英文摘要: |
| The radiated acoustic field which produced by a spiral coil electromagnetic acoustic transducer (EMAT) with Lorentz force mechanism was studied for the engineering application of the online train wheel ultrasonic testing system. The numerical methods of computing the eddy current, the equivalent surface stress and the radiated acoustic field were given and the directivity pattern radiated by this spiral coil transducer on steel block was analyzed, indicating the spatial directivity pattern of radiated radial shear wave was null axis and two side lobes. The results were guidance for understanding the radiated acoustic field of the spiral coil electromagnetic acoustic transducer and its engineering application of online wheel rim crack defect testing for heavy haul freight train. |
| DOI：10.11684/j.issn.1000-310X.2021.03.002 |
| 中文关键词: 电磁超声 重载货车车轮 在线车轮检测 声场指向性 |
| 英文关键词: electromagnetic acoustic transducer heavy haul freight train wheel online train wheel testing ultrasound field directivity |
| 基金项目: |
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