發(fā)布時間：2018-05-21 18:52

  本文選題：運動感聲品質(zhì) + 排氣系統(tǒng)　； 參考：《華中科技大學學報(自然科學版)》2016年10期

【摘要】：為提升某乘用車急加速排氣噪聲運動感聲品質(zhì),針對具有運動感聲品質(zhì)的汽車加速排氣階次噪聲頻譜特征及其結構實現(xiàn)方法開展研究.以原車加速排氣階次噪聲頻譜特征為基礎,利用窮舉法調(diào)制出若干聲音樣本,經(jīng)主觀評價確定運動感排氣噪聲目標樣本;分析其2,4和6階噪聲相較原車變化特征,確定其在頻率上的調(diào)整方案,再以此為目標對排氣系統(tǒng)結構進行改進設計,實現(xiàn)上述頻率段上聲壓級的調(diào)校.經(jīng)實測與主觀評價,改進方案的加速排氣噪聲運動感聲品質(zhì)評分提升至7.4,加速過程聲品質(zhì)運動感特征顯著.研究表明:通過排氣系統(tǒng)結構設計對階次噪聲頻譜特征進行調(diào)校,可實現(xiàn)汽車加速排氣噪聲運動感聲品質(zhì)提升.
[Abstract]:In order to improve the moving sound quality of a passenger vehicle's accelerating exhaust noise, the spectrum characteristics and structure realization method of the acceleration exhaust order noise of a passenger vehicle with motion sensitive sound quality are studied. Based on the spectrum characteristics of acceleration exhaust order noise of the original vehicle, some sound samples are modulated by exhaustive method, and the moving sense exhaust noise target samples are determined by subjective evaluation, and the variation characteristics of 2n4 and 6 order noise compared with the original vehicle are analyzed. The frequency adjustment scheme is determined, and the structure of the exhaust system is improved and designed to achieve the sound pressure level adjustment in the frequency range mentioned above. According to the actual measurement and subjective evaluation, the improved scheme of accelerated exhaust noise motion sense sound quality score increased to 7.4, the acceleration process sound quality motion sensitivity characteristics are significant. The results show that by adjusting the frequency spectrum characteristics of the order noise through the structural design of the exhaust system, the moving sound quality of the acceleration exhaust noise can be improved.
【作者單位】： 武漢理工大學現(xiàn)代汽車零部件技術湖北省重點實驗室;武漢理工大學汽車零部件技術湖北省協(xié)同創(chuàng)新中心;
【基金】：國家自然科學基金資助項目(51575410) 中央高�；究蒲袠I(yè)務費專項資金資助項目(2014-Ⅶ-004)
【分類號】：U464.134.4

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