电力电容器辐射噪声预测的快速边界型等效源方法

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 32-38.

论文

何强1，聂京凯1，刘文宇2，郑昌军2，毕传兴2，赵寿生3

作者信息 +

An efficient boundary-type equivalent source method for the prediction of noise radiated by power capacitors

HE Qiang1，NIE Jingkai1，LIU Wenyu2，ZHENG Changjun2，BI Chuanxing2，ZHAO Shousheng3

Author information +

文章历史 +

摘要

电力电容器的噪声控制问题越来越受到重视，准确高效的辐射噪声预测可以为降低电力电容器的辐射噪声水平提供参考。为此，提出一种可以用于电力电容器辐射噪声预测的快速边界型等效源方法。该方法通过将等效源点直接布置于结构表面，规避了等效源点的位置选取问题；还采用快速多极方法对求解过程进行加速处理，显著提高了噪声预测效率并降低了存储量；另外采用Burton-Miller型单双层混合势方法克服了计算过程中可能遇到的解的非唯一性问题，进一步提高了噪声预测的稳定性和准确性。数值算例验证了该方法的正确性与求解效率，以及在电力电容器组的辐射噪声预测这类大规模实际工程问题中的巨大潜力。

Abstract

The noise control of power capacitors has been drawing more and more attentions.Accurate and efficient prediction of noise is quite helpful for the reduction of noise radiated by power capacitors.To this end, this paper presents a fast boundary-type equivalent source method which can be used to predict the noise radiated by power capacitors.In this method, the equivalent sources are directly positioned at the surface of vibrating structures so as to avoid the difficulty of deciding the positions of equivalent sources in traditional equivalent source methods.The fast multipole method is also used to accelerate the computation and reduce the memory requirement.Moreover, the Burton-Miller-type mixed-layer potential method is further used to conquer the non-unique solution problem which may be encountered in traditional equivalent source methods.Numerical examples were employed to demonstrate the accuracy and efficiency of the method, and also the big potential in the prediction of noise radiated by power capacitors.

导出引用

何强1，聂京凯1，刘文宇2，郑昌军2，毕传兴2，赵寿生3. 电力电容器辐射噪声预测的快速边界型等效源方法[J]. 振动与冲击, 2020, 39(24): 32-38

HE Qiang1，NIE Jingkai1，LIU Wenyu2，ZHENG Changjun2，BI Chuanxing2，ZHAO Shousheng3. An efficient boundary-type equivalent source method for the prediction of noise radiated by power capacitors[J]. Journal of Vibration and Shock, 2020, 39(24): 32-38

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