微型客车发动机的噪声控制
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摘要
采用整车分别运行法获得发动机排气噪声、发动机燃烧噪声、发动机机械噪声、变速器噪声及其它噪声源噪声,分析发现发动机噪声是整车的主要辐射源,对发动机油底壳和消声器进行了一系列改进。结果表明,改进后的油底壳总成振型有明显改善,各阶频率较改进前有较大的提高,不同转速下,插入损失有较大程度的提高,而功率损失有不同程度的降低,车外加速噪声由原来的77.55d B降到73.28d B,降低了4.27d B。
A respective operating method of whole vehicle is used to obtain exhausting noise, combustion noise, mechanical noise of engine, transmission noise and other noise source, and it is found by analyze that engine noise is a main noise source of the whole car, and a series of developments are done for the oil sump and muffler. Results show that after development the vibrating mode has a obvious improvement and the whole oil sump the frequency is higher than before, on different speed insertion loss is increased greatly, and the power loss decreased in some different extent, and car outside acceleration noise is decreased from 77.55 d B to 73.28 d B, and a drop is 4.27 d B.
A respective operating method of whole vehicle is used to obtain exhausting noise, combustion noise, mechanical noise of engine, transmission noise and other noise source, and it is found by analyze that engine noise is a main noise source of the whole car, and a series of developments are done for the oil sump and muffler. Results show that after development the vibrating mode has a obvious improvement and the whole oil sump the frequency is higher than before, on different speed insertion loss is increased greatly, and the power loss decreased in some different extent, and car outside acceleration noise is decreased from 77.55 d B to 73.28 d B, and a drop is 4.27 d B.
引文
[1]赵海军,邓兆祥.计及气流再生噪声的消声器消声量的分析[J].汽车工程,2011,33(7):632-635.
[2]钟绍华,金国栋,张选国,等.消声器优化设计及其性能分析方法的研究[J].内燃机工程,2005,26(1):55-58.
[3]罗虹,赵世举,赵海军,等.消声器气流再生噪声测试技术研究.噪声与振动控制,2010,(5):116-120.
[4]邓兆祥,赵海军,杨杰,等.基于CFD的半主动排气消声器消声性能研究[J].内燃机工程.2009,30(5):83-87.
[5]尹潞刚,陆森林.某消声器插入损失有限元计算及优化[J].重庆理工大学学报(自然科学),2016,30(4):6-10.
[6]宋兆哲,杨景玲,德芳,等.发动机油底壳的辐射噪声析及结构优化[J].噪声与振动控制,2014,34(1):123-168.
[7]王志杰,胡习之.汽车消声器声学性能优化分析[J].科学技术与工程,2012,12(31):1671-1815.
[2]钟绍华,金国栋,张选国,等.消声器优化设计及其性能分析方法的研究[J].内燃机工程,2005,26(1):55-58.
[3]罗虹,赵世举,赵海军,等.消声器气流再生噪声测试技术研究.噪声与振动控制,2010,(5):116-120.
[4]邓兆祥,赵海军,杨杰,等.基于CFD的半主动排气消声器消声性能研究[J].内燃机工程.2009,30(5):83-87.
[5]尹潞刚,陆森林.某消声器插入损失有限元计算及优化[J].重庆理工大学学报(自然科学),2016,30(4):6-10.
[6]宋兆哲,杨景玲,德芳,等.发动机油底壳的辐射噪声析及结构优化[J].噪声与振动控制,2014,34(1):123-168.
[7]王志杰,胡习之.汽车消声器声学性能优化分析[J].科学技术与工程,2012,12(31):1671-1815.