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首页> 外文期刊>Canadian acoustics >Extended optimization Study and Panel Parameter Study for Noise Radiation Reduction of an aircraft Panel excited by Turbulent Flow
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Extended optimization Study and Panel Parameter Study for Noise Radiation Reduction of an aircraft Panel excited by Turbulent Flow

机译：湍流激发飞机面板噪声辐射减少的扩展优化研究与面板参数研究

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摘要

The noise and vibration in an aircraft cabin during cruise conditions is mostly caused by external flow excitations from the turbulent boundary layer (TBL). The TBL causes the fuselage panels on the aircraft to vibrate. These vibrations radiate sound energy in the form of noise. Therefore, it is of interest to determine which aircraft panel parameter is most sensitive in decreasing the amount of radiated sound power and how to optimize these parameters to reduce the noise into the aircraft cabin. An analytical model was created and validated using Matlab that calculates the acceleration power spectral density (PSD), which is related to radiated sound power (RSP). A sensitivity study was performed on the panel parameters, to determine the change in acceleration PSD, in relation to change in seven different panel parameters: panel thickness, material density, panel width and length, Elasticity modulus, Poisson's ratio, and damping ratio. An analytical method to optimize an aircraft panel is presented, by changing the panel properties, in order to reduce the acceleration PSD of the panel caused by the TBL. As expected the panel thickness and the panel density are the most consistent, and effective parameters at reducing the acceleration PSD at different octave bands in the human hearing range.
机译：在巡航条件下飞机机舱中的噪音和振动主要由来自湍流边界层（TBL）的外部流动激发引起。 TBL使飞机上的机身面板振动。这些振动以噪音的形式辐射声能。因此，确定哪些飞机面板参数最敏感，在减少辐射声功率的量以及如何优化这些参数以将噪声降低到飞机舱中。使用MATLAB创建和验证分析模型，该MATLAB计算加速功率谱密度（PSD），其与辐射声功率（RSP）有关。对面板参数进行敏感性研究，以确定加速PSD的变化，相对于七种不同面板参数的变化：面板厚度，材料密度，面板宽度和长度，弹性模量，泊松比和阻尼比。通过改变面板属性来提出优化飞机板的分析方法，以减少由TBL引起的面板的加速度PSD。正如预期的那样，面板厚度和面板密度是在人听力范围内的不同八度带中减少加速度PSD的最符合和有效参数。

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