变压器铁心远场辐射噪声预估方法

Prediction of Far Field Radiation Noise of Transformer Core

本文建立了一种根据变压器铁心表面法向振动加速度预估变压器铁心远场辐射噪声声场的方法。基于封闭表面法向加速度计算辐射声场的Helmholtz积分公式 ,建立了实验变压器铁心的声场计算数学模型 ,进行数值仿真 ,计算结果与经验公式的推导结果基本吻合。研究表明本文提出的计算方法可以用来预估变压器铁心辐射噪声声场。

This paper focuses on method to predict the far sound field of transformer core with surface vibration acceleration.Based on Helmholtz integral for the pressure resulting from the acceleration of a closed surface,a numerical calculation model of the sound pressure field outside a transformer core is presented.With comparison of the data derived from empirical formula,this method is proved to be effective.