| 宋亚辉,张晓亮,张跃林.民机适航噪声横向衰减特性分析及飞行试验研究[J].装备环境工程,2020,17(9):185-193. SONG Ya-hui,ZHANG Xiao-liang,ZHANG Yue-lin.Flight Test Investigation of Characteristics of Lateral Attenuation of Civil Aircraft Airworthiness Certification Noise[J].Equipment Environmental Engineering,2020,17(9):185-193. |
| 民机适航噪声横向衰减特性分析及飞行试验研究 |
| Flight Test Investigation of Characteristics of Lateral Attenuation of Civil Aircraft Airworthiness Certification Noise |
| 投稿时间：2020-07-06 修订日期：2020-08-06 |
| DOI：10.7643/issn.1672-9242.2020.09.032 |
| 中文关键词: 民机噪声 横向衰减 噪声模型 适航审定 飞行试验 |
| 英文关键词:civil aircraft noise lateral attenuation noise model airworthiness certification flight test |
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| 中文摘要: |
| 目的 进行民机适航噪声横向衰减建模及特性研究。方法 对民机适航噪声横向衰减工程模型进行分析，建立其主要影响因素的计算模型，基于模型设计等效飞行试验方法，以及试验数据设计横向衰减分析流程，通过某型国产民机噪声飞行试验，对横向衰减特性及模型进行分析。结果 民机适航的横向噪声受声传播效应、地面散射效应和动力装置/机体噪声安装效应等影响较大，声传播效应和地面散射效应分别对高频和低频成分具有显著影响，动力装置/机体噪声安装效应导致的噪声指向性差异也是影响横向衰减的主要因素。对于民机适航噪声评价量，横向衰减模型能够得到与飞行试验结果趋势一致的结果，但工程应用中仍需通过飞行试验进行修正。结论 提出的民机适航噪声横向衰减影响因素的量化计算模型以及等效飞行试验方法，可用于国产民机低噪声设计、噪声适航审定和机场周围噪声污染计算，服务于国产民机设计及适航取证。 |
| 英文摘要: |
| The paper aims to model the lateral attenuation and study the characteristics of civil aircraft airworthiness certification noise. Through analyzing SAE’s lateral attenuation empirical model, the calculating model of main influencing factors was established. Then the equivalent flight test was designed based on the model and the procedures of lateral attenuation were designed based on test data. The results showed that the lateral attenuation was mainly affected by the sound propagation effects, ground scattering effects and engine installation effects. Sound propagation effects and ground scattering effects had significant influences on high and low elements respectively. The noise directivity difference due to engine installation effects was also a main factor of the lateral attenuation. The prediction results of lateral attenuation model were approximately in agreement with flight test results. But it was necessary to be modified by meticulously designed flight test. The presented equivalent flight test method and the quantum chemical calculation model on lateral attenuation of civil aircraft noise can be applied to low noise design, noise airworthiness certification, and noise pollution calculation around the airport of domestic civil aircraft to service the design and airworthiness certification of domestic civil aircraft. |
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