民机噪声地面反射模型试验研究  

Experimental study on ground reflection model of civil aircraft noise

作　　者：徐亮[1] 张振 XU Liang;ZHANG Zhen(Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]上海飞机设计研究院,上海201210

出　　处：《民用飞机设计与研究》2025年第1期1-9,共9页Civil Aircraft Design & Research

摘　　要：针对民机噪声飞行试验测试中的噪声地面反射问题开展研究。首先通过理论分析,建立民机地面反射的理论计算模型。其次,以地面流阻率作为地面声阻抗的表征参数,形成一套针对不同地面噪声反射特性的测量方法,并对民机飞行测试的地面进行实地测量,测量结果作为后续开展噪声地面反射模型验证的输入条件。最后,应用民机噪声地面反射模型,预测飞行工况下的噪声反射结果,与实际飞行测试的结果进行对比发现:该模型在500 Hz以下频段,对噪声地面反射的声压级与飞行试验基本一致,且能准确识别民机噪声测量过程中由于地面反射造成的特征频率,具备较好的工程应用价值。The ground reflection of noise in the flight test of civil aircraft is studied.Firstly,through theoretical analysis,a theoretical calculation model of ground reflection of civil aircraft is established.Secondly,the ground flow resistivity is used as the characterization parameter of the ground acoustic impedance,and a set of measure⁃ment methods for different ground noise reflection characteristics are formed,and the ground measurement of civil aircraft flight test is carried out.The measurement results are used as the input conditions for the subsequent verifi⁃cation of the noise ground reflection model.Finally,the ground reflection model of civil aircraft noise is used to predict the noise reflection results under flight conditions,and compared with the results of actual flight tests.It is found that the sound pressure level of the noise ground reflection of the model is basically consistent with the flight test in the frequency band below 500 Hz,and can accurately identify the eigenfrequencies caused by ground reflec⁃tion in the process of civil aircraft noise measurement,which has good engineering application value.

关 键 词：民机噪声 飞行测试 噪声地面反射 地面声阻抗 

分 类 号：V221[航空宇航科学与技术—飞行器设计]