考虑温度场影响的排气消声器性能仿真优化
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摘要
针对某汽车怠速排气噪声过大的问题建立了其排气消声器的有限元模型,计算了消声器内部的温度场,将温度场计算结果与声学计算相结合,计算了温度场存在情况下的消声器内部声场和传递损失,分析了传递损失计算结果,指出了怠速噪声过大的原因,对主消声器进行了优化分析,实验结果表明,新方案排气噪声在整个转速范围内都比原方案有了明显降低。
In order to eliminate exhaust noise level during idling,the finite element model of an automobile muffler was built; the temperature field under idle condition was calculated. Temperature field and sound mesh was coupled directly,the transmission loss of the muffler was calculated in presence of temperature field. The result shows transmission loss is small at low frequency range. The optimization of muffler was made for the exhaust noise problem under idle condition. The experiment shows that the exhaust noise was reduced effectively.
In order to eliminate exhaust noise level during idling,the finite element model of an automobile muffler was built; the temperature field under idle condition was calculated. Temperature field and sound mesh was coupled directly,the transmission loss of the muffler was calculated in presence of temperature field. The result shows transmission loss is small at low frequency range. The optimization of muffler was made for the exhaust noise problem under idle condition. The experiment shows that the exhaust noise was reduced effectively.
引文
[1]庞剑,谌刚,何华.汽车噪声与振动[M].北京:北京理工大学出版社,2006:13-98.
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[4]董红亮,邓兆祥,来飞.考虑温度影响的消声器声学性能分析及改进[J].振动工程学报,2009,22(1):70-75.
[5]葛蕴珊,张宏波,宋艳冗,等.汽车排气消声器的三维声学性能分析[J].汽车工程,2006,28(1):51-55.
[6]HSIA S Y,CHIU S M,CHENG J W.Sound field analysis and simulation for fluid machines[J].Advances in Engineering Software,2009(40):15-22.
[7]BARBIERI R,NILSON B.Finite element acoustic simulation based shape optimization of a muffler[J].Applied Acoustics,2006(67):346-357.
[8]詹福良,徐俊伟.Virtual.Lab声学仿真计算从入门到精通[M].西安:西北工业大学出版社,2013:87-109.
[9]蔡克强.汽车消声器声学性能分析研究[D].合肥:合肥工业大学图书馆,2010.
[10]韦武.排气消声器的数值仿真分析[D].大连:大连理工大学图书馆,2013.
[2]李国祥,李娜,王伟,等.消声器内部流场及温度场的数值分析[J].内燃机学报,2003,21(5):337-340.
[3]黄其柏,师汉民,杨叔子,等.计及气流和线性温度梯度的内燃机穿孔声管排气消声器研究[J].内燃机学报,1993,11(1):77-82.
[4]董红亮,邓兆祥,来飞.考虑温度影响的消声器声学性能分析及改进[J].振动工程学报,2009,22(1):70-75.
[5]葛蕴珊,张宏波,宋艳冗,等.汽车排气消声器的三维声学性能分析[J].汽车工程,2006,28(1):51-55.
[6]HSIA S Y,CHIU S M,CHENG J W.Sound field analysis and simulation for fluid machines[J].Advances in Engineering Software,2009(40):15-22.
[7]BARBIERI R,NILSON B.Finite element acoustic simulation based shape optimization of a muffler[J].Applied Acoustics,2006(67):346-357.
[8]詹福良,徐俊伟.Virtual.Lab声学仿真计算从入门到精通[M].西安:西北工业大学出版社,2013:87-109.
[9]蔡克强.汽车消声器声学性能分析研究[D].合肥:合肥工业大学图书馆,2010.
[10]韦武.排气消声器的数值仿真分析[D].大连:大连理工大学图书馆,2013.