机械研究与应用
機械研究與應用
궤계연구여응용
Mechanical Research & Application
2015年
4期
33-36
,共4页
声学%飞机噪声%声衰减系数%1/3倍频程
聲學%飛機譟聲%聲衰減繫數%1/3倍頻程
성학%비궤조성%성쇠감계수%1/3배빈정
acoustics%aircraft noise%acoustic attenuation coefficient%one-third octave band
分析声吸收的基本原理，研究现有的大气声吸收的计算方法，运用新的大气声吸收的计算方法，计算民航客机在运营过程中产生的噪声在大气中的衰减量，并对影响其衰减的因素进行分析，然后将其结果与标准中提出的大气声衰减的方法进行比较。通过对比可得出，本文所采用的方法对声衰减的计算更加准确。
分析聲吸收的基本原理，研究現有的大氣聲吸收的計算方法，運用新的大氣聲吸收的計算方法，計算民航客機在運營過程中產生的譟聲在大氣中的衰減量，併對影響其衰減的因素進行分析，然後將其結果與標準中提齣的大氣聲衰減的方法進行比較。通過對比可得齣，本文所採用的方法對聲衰減的計算更加準確。
분석성흡수적기본원리，연구현유적대기성흡수적계산방법，운용신적대기성흡수적계산방법，계산민항객궤재운영과정중산생적조성재대기중적쇠감량，병대영향기쇠감적인소진행분석，연후장기결과여표준중제출적대기성쇠감적방법진행비교。통과대비가득출，본문소채용적방법대성쇠감적계산경가준학。
In this paper, the basic principle of sound absorption is analyzed, and the existing methods for calculating the at-mospheric acoustic absorption are studied. The new calculation method of atmospheric absorption is used to calculate the atten-uation of the aircraft noise which is produced in operation process, and the factors that would affect the attenuation are ana-lyzed. Then the results are compared with the existing ARP 866A standards in the calculation of aircraft noise certification lev-els. By the comparison, a conclusion can be received that the calculation method of acoustic attenuation adopted in this paper is more accurate than the ARP 866A methods. The new method will provide a great help for the governance of civil aviation noise pollution.
