某車型防火墻總成隔聲性能的優(yōu)化改進(jìn)

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摘要： 前圍內(nèi)隔音墊是汽車防火墻總成的重要隔音部件，研究了不同的前圍內(nèi)隔音墊材料、覆蓋率、軟層厚度分布、過孔本體隔聲、附件安裝工藝特征等對(duì)防火墻總成隔聲性能的影響。通過選取合適的材料組成及軟層厚度、提高隔音墊覆蓋率、提高過孔本體隔聲、降低泄漏量等手段實(shí)現(xiàn)對(duì)某車型防火墻總成隔聲性能的優(yōu)化改進(jìn)。

關(guān)鍵詞：防火墻總成 隔聲量 前圍內(nèi)隔音墊

中圖分類號(hào)：U463.82   文獻(xiàn)標(biāo)志碼：B   DOI： 10.19710/J.cnki.1003-8817.20240227

Optimization and Improvement of Sound Insulation Performance

of Firewall Assembly of A Vehicle Model

Liu Xiuying， Wang Yu， Huang Zhonghua， Song Jianxin， Zhu Lin， Zhao Fei

（Foton Research & Development Institute， Beijing 102206）

Abstract： The inner-dash sound insulation pad is an important part of the automobile firewall assembly. This paper studies the influence of different sound insulation pad materials， coverage rate， thickness distribution of soft layer and installation process characteristics of accessories on the sound insulation performance of the firewall assembly. The sound insulation performance of the firewall assembly of a vehicle model is optimized and improved through selecting appropriate material composition and soft layer thickness， improving the coverage rate of the sound insulation pad， and reducing the leakage amount.

Key words：  Firewall assembly， Sound insulation， Inner-dash sound insulation pad

1 前言

汽車的振動(dòng)噪聲性能直接影響消費(fèi)者的用車體驗(yàn)，因此，主機(jī)廠在噪聲、振動(dòng)與聲振粗糙度（Noise、Vibration、Harshness，NVH）方面的研發(fā)投入日益增加，有統(tǒng)計(jì)資料顯示[1]，各主機(jī)廠有近20%的研發(fā)費(fèi)用用于解決NVH問題。（剩余4883字）