噪声与振动控制
譟聲與振動控製
조성여진동공제
Noise and Vibration Control
2015年
5期
121-125
,共5页
声学%排气消声器%有限元法%声学性能%计算流体力学%气流再生噪声%结构优化
聲學%排氣消聲器%有限元法%聲學性能%計算流體力學%氣流再生譟聲%結構優化
성학%배기소성기%유한원법%성학성능%계산류체역학%기류재생조성%결구우화
acoustics%exhaust muffler%finite element method%acoustic characteristics%computational fluid dynamics%flow regenerated noise%structure optimization
针对某型车排气尾管噪声过高问题，利用三维有限元方法对排气消声器声学性能进行分析；再应用计算流体动力学方法对消声器内部流场进行模拟计算，分析产生气流再生噪声的原因。根据分析结果对排气消声器结构进行优化。使用优化后的排气消声器进行整车排气尾管噪声测试，结果表明尾管噪声明显降低，达到设计目标值。
針對某型車排氣尾管譟聲過高問題，利用三維有限元方法對排氣消聲器聲學性能進行分析；再應用計算流體動力學方法對消聲器內部流場進行模擬計算，分析產生氣流再生譟聲的原因。根據分析結果對排氣消聲器結構進行優化。使用優化後的排氣消聲器進行整車排氣尾管譟聲測試，結果錶明尾管譟聲明顯降低，達到設計目標值。
침대모형차배기미관조성과고문제，이용삼유유한원방법대배기소성기성학성능진행분석；재응용계산류체동역학방법대소성기내부류장진행모의계산，분석산생기류재생조성적원인。근거분석결과대배기소성기결구진행우화。사용우화후적배기소성기진행정차배기미관조성측시，결과표명미관조성명현강저，체도설계목표치。
The acoustic characteristics of an exhaust muffler were analyzed by using the 3D finite element method. The internal flow field of the muffler was simulated with computational fluid dynamics (CFD) method to find out the reason of the flow regenerated noise. The exhaust muffler structure was optimized based on the results. After the optimization, noise of the exhaust orifice of the vehicle was tested. It is found that the exhaust orifice noise is reduced significantly and the design target is reached.
