Finite Element Simulation and Optimization Design of Magnetic Circuit of High Sound Pressure Level Transducer
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摘要: 为使高声压级换能器磁路获得更大的磁感应强度和更小的质量，采用COMSOL Multiphysics仿真软件，建立高声压级换能器内磁式磁路结构有限元仿真模型，分析上导磁板相对下导磁板高度差对磁感应强度的影响；运用参数化扫描的方法，优化磁路结构永磁体厚度、上导磁板相对下导磁板高度差、导磁板内环半径与永磁体内环半径之差3个基本尺寸，使得参考线磁感应强度平均值最大化；利用软件优化模块，建立优化模型，优化后，参考线磁感应强度平均值基本不变，导磁板重量明显下降。Abstract: In order to obtain the greater magnetic induction and smaller mass of the magnetic circuit of high sound pressure level transducer, the finite element simulation model for the internal magnetic circuit structure of high sound pressure level transducer was established via COMSOL Multiphysics simulation software, and the influence of the height difference between the upper magnetic plate and the lower magnetic plate on the magnetic flux density was analyzed. Three basic dimensions of the magnetic circuit structure, the thickness of the permanent magnet, the height difference between the upper magnetic plate and the lower magnetic plate, and the difference between the inner ring radius of the magnetic plate and the inner ring radius of the permanent magnet were optimized by using the parametric scanning method. And the average value of the magnetic flux density of reference line was maximized. With the optimization module, the optimization model was established. After optimization, the average value of the magnetic flux density of the reference line was basically unchanged, and the weight of the magnetic plate was significantly reduced.
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Key words:
- transducer /
- magnetic circuit /
- finite element /
- optimization design
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表 4 优化变量设置
变量 对应线段 初始值/mm 下界/mm 上界/mm ropt BC 2 0 17 zopt AC 2 0 7 ropt1 QP 2 0 10 zopt1 QR 2 0 4 ropt2 DE 3 0 10 zopt2 EF 3 0 10 ropt3 HI 3 0 4 zopt3 GH 3 0 10 ropt4 NO 3 0 10 zopt4 MN 2 2 2 ropt5 K点到JL垂直距离 2 0 5 zopt5 K点到永磁体上表面垂直距离 2 0 5 
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表 5 最优结果
mm eropt zopt ropt1 zopt1 ropt2 zopt2 ropt3 zopt3 ropt4 zopt4 ropt5 zopt5 17 7 10 2 6 10 3 3 3 2 2 2
下载: 导出CSV
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