复合式多腔消声器声学性能仿真与分析
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摘要
针对某汽车消声器,研究消声器进出口轴向角度对消声器消声性能的影响规律。改变消声器进气管伸进长度、进出口轴向角度等结构参数,采用声学有限元法,借助Virtual Lab声学仿真软件,计算消声器的消声性能。结果显示,消声器进出口轴向角度对消声器消声性能影响显著,影响程度随着穿孔管穿孔率的增大而增加。与原消声器相比,当进出口轴向角度为120°时,消声器的消声性能良好。最后通过试验验证了进出口轴向角度改善汽车消声器消声性能的有效性。
The effect of the axial angle of inlet and outlet on the acoustic performance of automotive muffler is investigated. The finite element method is applied and the software VirtualLab is adopted to calculate acoustic performance of compound mufflers under different lengths of intake manifold and axial angles of inlet and outlet. The results reveal that that the effect of axial angle on acoustic performance increased with the increase of perforation ratio. Compared with the proposed muffler, improved compound muffler has better acoustic performance when the axial angle is 120°, and it is verified that the right axial angle can improve acoustic performance of automotive compound muffler.
The effect of the axial angle of inlet and outlet on the acoustic performance of automotive muffler is investigated. The finite element method is applied and the software VirtualLab is adopted to calculate acoustic performance of compound mufflers under different lengths of intake manifold and axial angles of inlet and outlet. The results reveal that that the effect of axial angle on acoustic performance increased with the increase of perforation ratio. Compared with the proposed muffler, improved compound muffler has better acoustic performance when the axial angle is 120°, and it is verified that the right axial angle can improve acoustic performance of automotive compound muffler.
引文
1范钱,沈颖刚,舒歌群,等.车用柴油机排气消声器的改进设计研究[J].小型内燃机与摩托车,2008,37(2):84-87
2金志玲,刘胜吉,黄智建,等.S1100柴油机净化消声器的设计与试验研究[J].小型内燃机与车辆技术,2017,46(5):42-46+51
3 Eriksson L J.Effect of inlet/outlet location on higher order modes in silencers[J].Journal of the Acoustical Society of America,1982,72:1208-1211
4 Selamet A.,Ji Zhenlin.Acoustic attenuation performance of circular expansion chamber with extended inlet/outlet[J].Journal of Sound and Vibration,1999,223:197-212
5 Selamet A.,Ji Zhenlin,Radavich P.M.Acoustic attenuation performance of circular expansion chamber with offset inlet outlet:II comparision with experimental and computational studies[J].Journal of Sound and Vibration,1998,223(4):619-641
6张士伟,陈长征,周勃,等.装载机消声器的消声性能的仿真计算与分析[J].噪声与振动控制,2015,35(2):201-204
7 Wu C.H.,Wang C.N.Attenuation for the simple expansion chamber muffler with a right angle inlet[J].Journal of Mechanics,2011,27(3):287-292
8 Yi S.I.,Lee B.H.Three dimensional acoustic analysis of Ccircular expansion chambers with a side inlet and a side outlet[J].Acoustical Society of America,1986,79:1299-1306
9 Venkatesham B.,Tiwari M.,Munja ML.Transmission loss analysis of rectangular expansion chamber with arbitrary location of inlet/outlet by means of Green's functions[J].Journal of Sound and Vibration,2009,323:1032-1044
10 Keskar H.,Venkatesham B..Transmission loss characteristics of an annular cavity with arbitrary port locations using Green's function method[J].Acoustical Society of America,2017,142(3):1350-1361
2金志玲,刘胜吉,黄智建,等.S1100柴油机净化消声器的设计与试验研究[J].小型内燃机与车辆技术,2017,46(5):42-46+51
3 Eriksson L J.Effect of inlet/outlet location on higher order modes in silencers[J].Journal of the Acoustical Society of America,1982,72:1208-1211
4 Selamet A.,Ji Zhenlin.Acoustic attenuation performance of circular expansion chamber with extended inlet/outlet[J].Journal of Sound and Vibration,1999,223:197-212
5 Selamet A.,Ji Zhenlin,Radavich P.M.Acoustic attenuation performance of circular expansion chamber with offset inlet outlet:II comparision with experimental and computational studies[J].Journal of Sound and Vibration,1998,223(4):619-641
6张士伟,陈长征,周勃,等.装载机消声器的消声性能的仿真计算与分析[J].噪声与振动控制,2015,35(2):201-204
7 Wu C.H.,Wang C.N.Attenuation for the simple expansion chamber muffler with a right angle inlet[J].Journal of Mechanics,2011,27(3):287-292
8 Yi S.I.,Lee B.H.Three dimensional acoustic analysis of Ccircular expansion chambers with a side inlet and a side outlet[J].Acoustical Society of America,1986,79:1299-1306
9 Venkatesham B.,Tiwari M.,Munja ML.Transmission loss analysis of rectangular expansion chamber with arbitrary location of inlet/outlet by means of Green's functions[J].Journal of Sound and Vibration,2009,323:1032-1044
10 Keskar H.,Venkatesham B..Transmission loss characteristics of an annular cavity with arbitrary port locations using Green's function method[J].Acoustical Society of America,2017,142(3):1350-1361