关键词: 噪声, 振动, 声疲劳, 大型商务飞机, 载荷谱

Abstract: In this article the following three questions of aircraft are discussed： the first one is the control of vibroacoustic; the second one is the interference of noise in airport；the third one is the design for noise fatigue in a certain components. For these tasks, the research of aircraft noise is introduced in Beijing Institute of Structure and Environment Engineering. Engineering solutions for the large commercial aircraft are presented, including obtaining the payload spectrum of noise; the control of jet noise and large commercial aircraft cabin noise; the design for noise fatigue. Similitude rule of supersound jet is researched, and the payload of rocket takeoffnoise achieves the same precision with heatfluxscaling model test. It is more convenient and economic the true measure than wind tunnel measure for aircraft; the main difficulty of measuring noise truly is how to measure the fact of pneumatic noise, the way of setting microphone, the change of the static pressure on aircraft surfaces, and so on; the control of jet noise is coldairscaling model test; the theory and method of cold airscaling model test is recommended; it’s discussed that it’s necessary for the test of fatigue intensity to adopt the theory of statistical analysis. From different aspects, this article discusses the noise task of large commercial aircraft, this is very important problem to research the comfort, economy and safety of aircraft, there is important practical significance for China to develop large commercial aircraft project.

Key words: noise, vibration, acoustics fatigue, large commercial aircraft, load spectrum