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第 37 卷 第 6 期                                                                        Vol. 37, No.6
             2018 年 11 月                         Journal of Applied Acoustics                 November, 2018


             ⋄ 研究报告 ⋄


                   民机噪声适航合格审定试验中地面影响研究





                                             宋亚辉      †   张晓亮 张跃林


                                             (中国飞行试验研究院      飞机所   西安   710089)

                摘要    在民用飞机噪声适航合格审定试验中,传声器布置在地面上 1.2 m 处,测得的噪声包含地面影响。该文
                提出了一种分析地面对民机噪声适航合格审定试验中有效感觉噪声级影响的方法,并以 ARJ21-700 飞机噪声
                适航合格审定试验为例,对地面对飞越噪声的影响进行了计算和分析。在对飞行试验中飞机自由场声压级理
                论计算方法进行分析的基础上,通过飞越噪声测量点处布置的倒置传声器装置测量结果,计算了该测量点处
                的自由场声压级。随后,对满足 “CCAR-36 部” 的不同地面声阻抗对噪声的影响进行了计算,分析了地面条件
                对噪声适航合格审定中有效感觉噪声级的影响。结果表明,地面声阻抗对噪声适航合格审定结果有明显影响,
                该方法可以为民用飞机噪声适航合格审定试验提供一种分析测量点地面的声学处理对噪声评定结果影响的
                手段。
                关键词     民机噪声,适航合格审定,地面影响,飞行试验,有效感觉噪声级
                中图法分类号: V217.1, V216.5+4          文献标识码: A          文章编号: 1000-310X(2018)06-0927-07
                DOI: 10.11684/j.issn.1000-310X.2018.06.014




                     Effect of ground surface on civil aircraft airworthiness certification

                                                     noise results


                                    SONG Yahui     ZHANG Xiaoliang     ZHANG Yuelin

                        (Aircraft Flight Test Technology Institute, Chinese Flight Test Establishment, Xi’an 710089, China)

                 Abstract  Civil aircraft flight noise should be acquired by microphones mounted 1.2 meters above ground
                 on airworthiness certification. Such a measurement method leads to misrepresentation of noise character due
                 to ground surface interference effect. In order to analyze the effect on civil aircraft’s effective perceived noise
                 level (EPNL), a method is presented and the interference effect on ARJ21-700 at flyover noise measuring point
                 produced by ground surface is studied. On the basis of theoretical analysis method, through analyzing the data
                 acquired by the inverted-microphone device, ARJ21-700’s free field sound pressure levels are obtained. Then
                 the interference effect on EPNL of flyover produced by different finite acoustical impedance of ground surface
                 which meets the certification requirements of CCAR-36 is analyzed. The results show that the acoustical
                 impedance of ground surface has significant impact on noise results and the method presented could be used
                 to evaluate the influence on EPNL of acoustic treatment of ground surface around measuring points on civil
                 aircraft airworthiness certification.
                 Key words Civil aircraft noise, Airworthiness certification, Ground effect, Flight test, Effective perceived
                 noise level

             2017-12-30 收稿; 2018-03-24 定稿
             作者简介: 宋亚辉 (1985- ), 男, 河南鹿邑人, 硕士研究生, 研究方向: 飞行器结构动力学, 航空声学。
             † 通讯作者 E-mail: songyahuilym@163.com
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