排气消声器动感音开发
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摘要
基于排气声源噪声测试,制定排气动感音性能目标,应用GT-POWER软件计算消声器高温气流条件下的传递损失,分析温度和流速对阻抗复合式消声器消声能力的影响,并进行消声器内部结构设计,采用尾管声模态原理,进行尾管长度设计,最终根据尾管噪声测试结果,对比不同尾管长度对于共振带和阶次声压级的影响,排气尾管噪声主观评价满足动感音要求。
According to the sound source testing of exhaust systems, objectives of exhaust sporty sound quality are formulated. The transmission loss of the muffler is calculated in the high temperature gas flow condition by using the GTPOWER software. The effects of temperature and gas flow rate on the sound elimination ability of the impedance composite muffler are analyzed. The interior structure of the muffler is designed. The tailpipe length is determined based on the principle of tailpipe acoustic modal. Finally, based on the results of exhaust tailpipe noise testing, the influences of different tailpipe length on resonance band and order sound pressure level are compared mutually. According to the subjective evaluation, it is concluded that the exhaust tailpipe noise can meet the requirement of sporty sound quality.
According to the sound source testing of exhaust systems, objectives of exhaust sporty sound quality are formulated. The transmission loss of the muffler is calculated in the high temperature gas flow condition by using the GTPOWER software. The effects of temperature and gas flow rate on the sound elimination ability of the impedance composite muffler are analyzed. The interior structure of the muffler is designed. The tailpipe length is determined based on the principle of tailpipe acoustic modal. Finally, based on the results of exhaust tailpipe noise testing, the influences of different tailpipe length on resonance band and order sound pressure level are compared mutually. According to the subjective evaluation, it is concluded that the exhaust tailpipe noise can meet the requirement of sporty sound quality.
引文
[1]刘晨,季振林,胡志龙.高温气流对穿孔管消声器声学性能的影响[J].汽车工程,2008,30(4):330-334.
[2]杨润潮,颜伏伍,刘志恩.发动机工作过程和消声器特性耦合的建模与设计[J].噪声与振动控制,2011,31(4):155-159.
[3]徐贝贝,季振林,康钟绪,等.均匀流直通穿孔管消声器声学特性预测的有限元法[J].噪声与振动控制,2010,30(4):100-103.
[4]季振林.直通穿孔管消声器声学性能计算及分析[J].哈尔滨工程大学学报,2005,26(3):302-306.
[5]季振林.穿孔管阻性消声器消声性能计算及分析[J].振动工程学报,2005,18(4):453-457.
[6]张威,卢炽华,杜松泽,等.排气噪声阶次调制软件实现及应用[J].汽车技术,2016(5):26-30.
[7]王少康.消声器内三维流动的数值模拟研究[D].吉林:吉林大学,2007.
[8]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.
[2]杨润潮,颜伏伍,刘志恩.发动机工作过程和消声器特性耦合的建模与设计[J].噪声与振动控制,2011,31(4):155-159.
[3]徐贝贝,季振林,康钟绪,等.均匀流直通穿孔管消声器声学特性预测的有限元法[J].噪声与振动控制,2010,30(4):100-103.
[4]季振林.直通穿孔管消声器声学性能计算及分析[J].哈尔滨工程大学学报,2005,26(3):302-306.
[5]季振林.穿孔管阻性消声器消声性能计算及分析[J].振动工程学报,2005,18(4):453-457.
[6]张威,卢炽华,杜松泽,等.排气噪声阶次调制软件实现及应用[J].汽车技术,2016(5):26-30.
[7]王少康.消声器内三维流动的数值模拟研究[D].吉林:吉林大学,2007.
[8]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.