摘要
某轻卡车加速中存在明显的"嘟嘟"声异响,在试验跑道上测量进气管口和车内驾驶员右耳处声压频谱,确定其异响声源为进气管路共振噪声(240～400 Hz)。根据共振噪声的频率范围,在进气管路上设计了三个赫姆霍兹谐振腔,通过计算传递损失和消声量,验证目标频段内的消声性能。最后制作优化样件进行试验验证,结果表明:优化后的进气系统在目标频段具有理想的消声性能,进气系统共振噪声得到了有效的控制。
The toot noise was produced when the light truck in constant acceleration. The sound pressure spectra of intake noise and interior noise at driver’ s right ear are measured in a road test with the source of abnormal noise was resonance noise(240~400 Hz) in intake system. According to the frequency range of resonance noise, three Helmholtz resonators were designed at intake pipe and the noise attenuation performance in objective frequency range was verified by calculating the transmission loss and noise reduction. Finally, the optimized sample was trial-produced and tested, and the results indicate that optimized intake system has ideal noise attenuation performance in objective frequency range and can effectively suppress resonance noise in intake system.
作者
高东东
赵帅
吕勤
范习民
郑超
GAO Dongdong;ZHAO Shuai;LV Qin;FAN Ximing;ZHENG Chao(Anhui Jianghuai Automobile Group Co.,Ltd.,Hefei 230601)
出处
《内燃机》
2019年第1期59-62,共4页
Internal Combustion Engines
关键词
共振噪声
赫姆霍兹谐振腔
传递损失
消声量
resonance noise
helmholtz resonator
transmission loss
noise reduction
