摘要
为降低路面激励引起的车内噪声,通过构造路面,采用声传递向量法（Acoustic Transfer Vector,ATV）以及1/3倍频程滤波的方法,求解驾驶员耳旁20~250 Hz频段内各中心频率处的A级声压以及驾驶员感受到的总声压,以真实反映人耳对路面激励引起的车内噪声的感受。将沥青路面激励下某车型的悬架与车身之间的作用力作为激振力,应用动力学软件进行仿真;采用有限元法中的响应分析计算车身振动的速度响应;以车身振动速度响应作为边界条件,利用基于边界元的声传递向量法计算出车内声学响应。获得的路面激励与车内声响应之间的关系可为车内噪声的控制、悬架系统的优化提供参考。
To reduce vehicle inner noise caused by road excitation,the road surface is built,Acoustic Transfer Vector（ATV） method and 1/3 octave filter method are used to get A-level sound pressure of the center frequency and total sound pressure felt by drivers for the sound between 20 and 250 Hz beside driver＇s ears,and so the sound response of human ears to sound loudness can be reflected truly.The excitation forces between suspension and body under asphalt road excitation are simulated by using dynamics software;the body vibration velocity response is calculated by response analysis function of finite element method;taken body vibration velocity response as boundary constrains,the acoustic response in body cabin is calculated by acoustic transfer vector method which is based on boundary element.The obtained relationship between road excitation and vehicle inner noise can provide references for vehicle inner noise control and suspension system optimization.
出处
《振动工程学报》
EI
CSCD
北大核心
2010年第6期625-629,共5页
Journal of Vibration Engineering
关键词
路面激励
车内噪声
声固耦合
声传递向量法
有限元法
road excitation
vehicle inner noise
acoustic and structural coupling
acoustic transfer vector
finite element method
