| 崔佳嘉,马宏忠,李 楠,程 龙.基于 COMSOL 的变压器铁心振动声场分布的
有限元仿真[J].电子测量与仪器学报,2022,36(4):48-55 |
| 基于 COMSOL 的变压器铁心振动声场分布的
有限元仿真 |
| Simulation and analysis of vibration and noise of oil immersedtransformer core based on COMSOL |
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| DOI： |
| 中文关键词: 铁心振动 多物理场耦合 空载 声场分布 |
| 英文关键词:core vibration coupling of multiple physical fields no load operation sound field distribution |
| 基金项目:国家自然科学基金（51577050）项目资助 |
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| 中文摘要: |
| 为了研究变压器铁芯振动噪声的分布情况,本文基于 COMSOL 的多物理场耦合计算分析一台 200 kVA 油浸式变压器
铁芯振动的声场分布。 首先利用 COMSOL 有限元计算软件,构建了 200 kVA 油浸式变压器铁芯振动的电-磁-力多物理场模型,
计算出变压器铁芯磁场分布情况及铁芯所受应力分布变化规律、位移分布规律,并对铁芯的典型位置的应力时域数据做频谱分
析,得到铁芯所受应力集中在 100、200、300 Hz. 再将上述多物理场计算出的铁芯表面加速度经过 FFT 变换后的频域数据作为声
场的激励源,作声场的谐响应分析计算出变压器铁芯振动的声场分布。 最后,以一台 200 kVA 变压器空载实验数据验证仿真数
据的正确性,经过比较发现有较好的吻合效果。 仿真与实验得到的一致规律是:变压器铁芯振动噪声频率集中在 500 Hz 以下,
且发现规律:变压器油箱的侧方声压>上方声压>正面声压;变压器油箱的侧方及上方的声压频率含量是 100 Hz> 200 Hz>
300 Hz,而油箱的正面声压频率含量是 100 Hz>300 Hz>200 Hz。 |
| 英文摘要: |
| In order to study the distribution of vibration and noise of transformer core, the sound field distribution of core vibration of a
200 kVA oil immersed transformer is analyzed based on the multi physical field coupling calculation of COMSOL. Firstly, the electromagnetic force multi physical field model of core vibration of 200 kVA oil immersed transformer is constructed by using COMSOL finite
element calculation software. The magnetic field distribution of transformer core, the variation law of stress distribution and displacement
distribution of core are calculated. The stress time domain data of typical positions of core are analyzed by spectrum, and the stress
concentration of core is 100, 200 and 300 Hz. Then, the frequency domain data of the iron core surface acceleration calculated by the
above multiple physical fields after FFT transformation is used as the excitation source of the sound field, the harmonic response of the
sound field is analyzed, and the sound field distribution of the transformer iron core vibration is calculated. Finally, the correctness of
the simulation data is verified by the no-load experimental data of a 200 kVA transformer. After comparison, it is found that it has a good
agreement effect. The consistent law between simulation and experiment is that the vibration and noise frequency of transformer core is
concentrated below 500 Hz, and it is found that the side sound pressure of transformer oil tank > upper sound pressure > front sound
pressure; The sound pressure frequency content on the side and above the transformer oil tank is 100 Hz > 200 Hz>300 Hz, while the
sound pressure frequency content on the front of the oil tank is 100 Hz>300 Hz>200 Hz. |
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