论文:2012,Vol:30,Issue(3):384-389
引用本文:
陈熠, 贺尔铭, 扈西枝, 韩峰. 大型客机发动机振动载荷传递特性研究[J]. 西北工业大学
Chen Yi, He Erming, Hu Xizhi, Han Feng. Exploring Wing-Mounted Engine Vibration Transmission for New Generation Airplanes with Turbofan Engines of High Bypass Ratio[J]. Northwestern polytechnical university

大型客机发动机振动载荷传递特性研究
陈熠1, 贺尔铭1, 扈西枝2, 韩峰2
1. 西北工业大学 航空学院,陕西 西安 710072;
2. 中国商飞上海飞机设计研究院,上海 200232
摘要:
高涵道比涡扇发动机的振动冲击频段向低频转移,使得飞机舱内噪声频率分布中的低频结构传递噪声变得更加突出。为了研究发动机振动载荷通过机翼向机身传递的中低频振动特性,文章针对真实客机的结构动力特性,创新地提出了机翼双梁动力学模型概念,建立了"吊架-机翼-机身"全机动力学有限元模型;基于发动机的振动载荷谱,分析了发动机振动通过机翼向机身结构传递的载荷特性,为后续舱内噪声预计提供了数据输入;并仿真辨识了发动机振动传递的主路径,为舱内声学设计及发动机隔振安装提供了基础数据。文中研究结果对我国大型客机的减振降噪设计工作有重要的工程参考价值。
关键词:    发动机振动    结构传递噪声    隔振    传递路径   
Exploring Wing-Mounted Engine Vibration Transmission for New Generation Airplanes with Turbofan Engines of High Bypass Ratio
Chen Yi1, He Erming1, Hu Xizhi2, Han Feng2
1. College of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China;
2. Shanghai Aircraft Design and Research Institute (SADRI), Shanghai 200232,China
Abstract:
The use of turbofan engines of high bypass ratio has caused the low-frequency structure-borne noise. Toinvestigate the medium and low frequency vibration transmission through wing structure to airframe,we introducethe double-beam dynamic model of a wing and build the"pylon-wing-airframe"dynamic half model of a full air-plane,which takes into account the dynamics of an actual airplane. Sections 1 through 4 of the full paper explainthe exploration mentioned in the title; their core consists of: (1) we use the vibration spectrum of the turbofan en-gines to calculate the vibration load of the airplane at each section of the airframe transmitted from wing to the air-frame,which provides the input data for estimating the noise level of the pressurized cabin; (2) through simula-tion,we identify the main path of engines’vibration transmission to the airframe; the simulation results,given inFigs. 6 and 7,and their analysis form,in our opinion,a useful preparation for pylon structure vibration reduction,engine vibration isolation mounting and the acoustic design inside the cabin.
Key words:    bypass ratio    finite element method    modal analysis    natural frequencies    transport aircraft    wings    turbofan engines    vibrations (mechanical)    wings;engine vibration    structure-borne noise    vibrationisolation    transmission path   
收稿日期: 2011-06-02     修回日期:
DOI:
基金项目: 国家自然科学基金(50775181);教育部博士点基金(20116102110002)资助
通讯作者:     Email:
作者简介: 陈熠(1987-),西北工业大学硕士研究生,主要从事结构动力学及结构振动研究。
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