摘要
以电动汽车驻车制动工况下车内噪声舒适性为研究对象。首先根据实测数据初步判断电子真空泵为车内噪声主要来源,然后以声压级和响度作为综合评价参数,通过噪声传递路径剖析,获知结构噪声是影响车内噪声性能的主要因素。最后针对振源和路径提出调校优化方案:(1)在真空泵本体上粘贴阻尼材料;(2)优化安装支架结构,提高其刚度。该方案使车内噪声声压级降低6.46 dB(A),响度降低约1 sone,车内噪声性能得到明显改善,声品质得到大大提升。上述研究表明,综合运用声压级和响度可为电动车噪声舒适性分析提供更客观、全面的评价参数;真空泵所导致结构噪声是影响车内噪声性能的主要因素。
The internal noise and ride comfort of electric vehicles under the condition of vehicle’s parking and braking are studied.Firstly,according to the measurement data,the electronic vacuum pump is taken as the main source of noise inside the vehicle.Then,through the noise transmission path analysis with the sound pressure level and loudness as comprehensive evaluation indexes,it is found that the structural noise is the main factor affecting the noise performance inside the vehicle.Finally,a troubleshooting optimization scheme is proposed in view of the vibration source and the transmission path,that is(1)attaching the damping material to the vacuum pump body;(2)optimizing the mounting bracket structure to raise its rigidity.After the scheme is realized,the sound pressure level of the interior noise is reduced by 6.46 dB(A),the loudness is reduced by about 1 sone,and the noise performance inside the vehicle is significantly improved.And the sound quality of the vehicle is greatly improved.The above research shows that the comprehensive use of sound pressure level and loudness indexes can provide more objective and comprehensive evaluation parameters for electric vehicle noise and ride comfort analyses.It is concluded that the vacuum pump causes the structural noise which is the main factor affecting the noise performance inside the vehicle.
作者
张宇
王梦翔
李进
ZHANG Yu;WANG Mengxiang;LI Jin(School of Intelligent Manufacturing and Automotive,Chongqing Electronic Engineering Vocational College,Chongqing 401331,China;DFSK Automobile Co.,Ltd.,Chongqing 402247,China)
出处
《噪声与振动控制》
CSCD
2020年第6期165-169,共5页
Noise and Vibration Control
基金
重庆市教育委员会科学技术研究计划青年资助项目(KJQN201903102)。
关键词
声学
电动汽车
电子真空泵
声压级
响度
声品质
acoustics
electric vehicle
electronic vacuum pump
sound pressure level
loudness
sound quality
