【摘要】：針對某型飛機前起落架1/6縮比模型及起落架支柱在聲學風洞中進行了氣動噪聲試驗研究。試驗結(jié)果表明:起落架與起落架支柱噪聲具有寬頻噪聲特性;噪聲源主要是偶極子和單極子聲源,遠場噪聲具有一定的偶極子指向性;噪聲頻譜出現(xiàn)明顯的峰值噪聲,其頻率隨流速的增大而增加,這是減振支柱與防扭臂的干涉噪聲;噪聲頻率與起落架結(jié)構(gòu)的特征尺寸長度相關(guān),尺寸較大的結(jié)構(gòu)引起中低頻噪聲,尺寸較小的結(jié)構(gòu)引起高頻噪聲。
[Abstract]:Based on the 1 / 6 scale model of the front landing gear of a certain aircraft, the aerodynamic noise test of the landing gear support in the acoustic wind tunnel was carried out. The experimental results show that the noise of landing gear and landing gear has the characteristics of wide-band noise, the noise source is mainly dipole and monopole sound source, and the far-field noise has certain dipole directivity. There is obvious peak noise in the noise spectrum, and the frequency increases with the increase of the velocity, which is the interference noise between the vibration absorber and the anti-torsion arm. The noise frequency is related to the length of the characteristic size of the landing gear structure. The larger structure causes the middle and low frequency noise, and the smaller structure causes the high frequency noise.
【作者單位】： 中國飛機強度研究所;西北工業(yè)大學;
【基金】：航空科學基金(20121223006)資助
【分類號】：V226;V216

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