小型柴油发电机组隔声罩结构优化设计研究

毕凤荣; 杨晓; 马腾

doi:10.13433/j.cnki.1003-8728.2018.0101

小型柴油发电机组隔声罩结构优化设计研究

doi: 10.13433/j.cnki.1003-8728.2018.0101

1.
天津大学内燃机燃烧学国家重点实验室, 天津 300072

基金项目:

国家科技支撑计划项目（2015BAF07B04）资助

详细信息

作者简介:
毕凤荣(1965-),副教授,博士,博士生导师,研究方向为振动噪声控制、汽车动力学,fr_bi@tju.edu.cn

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出版历程
- 收稿日期: 2016-10-14
- 刊出日期: 2018-01-15

Design and Optimization of Noise Isolation Hoods for Small Diesel Generator Set

1.
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

摘要

摘要: 采用实验手段研究了小型柴油发电机组的噪声源和噪声特性，对不同频率范围的噪声提出了具体可行的隔声罩结构优化措施。针对结构隔声量，分析板结构质量是影响隔声罩隔声量的主要因素，采用拓扑优化方法进行优化设计，使1 000 Hz频率以下噪声隔声量达13.16 dB （A）；对隔声罩通风口处的声能泄露，确定中高频噪声为噪声控制主要目标，在考虑管道内存在高次波传播的情况下，分析管道隔板位置和大小对传递损失的影响，采用遗传算法设计和优化通风管道结构，减少高次波的传播，使1 000 Hz~3 500 Hz频率范围内噪声传递损失达30.3 dB （A）。通过以上措施，小型柴油发电机组7 m处的噪声降低至60.7 dB （A）。
- 柴油发电机组 /
- 噪声控制 /
- 结构优化 /
- 遗传算法
Abstract: Noise source identification and character analysis of a small diesel engine generator set is carried out by experimental ways. Based on the results, the structural optimization measures of sound insulation hood are put forward. For low frequency range, structure mass of noise insulation plate is confirmed to be the key influencing factor of transmission loss, and topological optimization is carried out. Transmission loss below 1 000 Hz is 13.16 dB(A). For middle-high frequency range spread through air vent of the enclosure, considering high-order sound wave propagated in air duct, baffle position and window width are the key factors influencing transmission loss, and optimized by genetic algorithm to suppress high-order sound wave. Transmission loss of air duct silencer is 30.3 dB(A). This method is verified by a test and sound pressure level of the generator set at a distance of 7 m is reduced to 60.7 dB(A).
- diesel generator set /
- noise control /
- structural optimization /
- genetic algorithm

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参考文献(16)

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