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| 基于ARMA模型的变压器噪声逆向还原实验研究 |
| Experimental study on the reverse reconstruction of the transformer noise based on ARMA model |
| 投稿时间：2022-03-11 |
| DOI：10.13259/j.cnki.eri.2023.02.003 |
| 中文关键词: 变压器 声辐射指数 噪声 表面振速法 频响函数法 |
| 英文关键词:transformer sound radiation index noise surface vibration velocity frequency response function |
| 基金项目:国网上海市电力公司科技项目（52094020005M） |
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| 中文摘要: |
| 基于声辐射理论和激光测振原理，通过实验测量干式变压器模型的表面振速和辐射噪声声压，分别采用表面振速法和频响函数法求得变压器的声辐射指数。在此基础上，采用自回归滑动平均（ARMA）模型开展变压器噪声逆向还原研究，获取声压与声压级预测值，并与实验值进行对比。结果表明：采用频响函数法得到的声辐射指数比采用表面振速法得到的约大1.0 ～ 1.5 dB；采用基于ARMA模型的噪声预测算法得到的声压与实验得到的声压约相差0.015 Pa，声压级约相差1 dB；利用基于ARMA模型的预测算法和激光测振原理进行噪声逆向还原具有较好的可行性，且可推广应用于其他结构辐射噪声的预测。 |
| 英文摘要: |
| In terms of the acoustic radiation theory and laser vibration measurement theory, both the surface vibration velocity and sound pressure of radiation noise from a dry-type model transformer were measured. And the frequency response function method and surface vibration velocity method were used to obtain the sound radiation index of the transformer, respectively. The autoregressive moving average model (ARMA) was used for the reverse reconstruction of transformer noise. And the predicted values of sound pressure and its level were obtained and compared with the experimental data. Results show that the sound radiation index obtained by the frequency response function method is 1.0~1.5 dB larger than the calculated results by the surface vibration velocity method. The difference of sound pressure and its level between the ARMA model and the test is 0.015 Pa and 1 dB, respectively. The ARMA model and laser vibration measurement method for the noise reverse reconstruction has good feasibility and can be used for the prediction of radiation noise of the other structures. |
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