飞机着舰瞬态冲击噪声研究

Study on transient impact noise of aircraft landing on ships

本文针对飞机着舰瞬态冲击引起的舰船空气噪声问题,基于显示动力学和瞬态边界元方法开展飞机着舰瞬态冲击噪声特性研究,建立飞机着舰瞬态冲击噪声预报方法及流程,并通过模型试验验证方法的有效性。在此基础上,以某船飞机降落甲板为研究对象,探究飞机着舰冲量、脉宽、幅值等冲击载荷特性参数对飞机着舰瞬态冲击噪声的影响规律。研究表明,飞机着舰冲击载荷下,甲板瞬态辐射噪声随载荷脉宽的增加而降低,随载荷幅值的增加而不断增大,且辐射噪声峰值主要聚集在低频段。

Aiming at the problem of ship air noise caused by aircraft landing transient impact,the characteristics of transient impact noise are studied based on display dynamics and transient boundary element method.The prediction method and process of transient impact noise are established and the validity of the method is verified by the experiment.On this basis,the landing deck of the ship is taken as the research object to explore the influence of impact characteristic parameters such as aircraft landing impulse,pulse width and amplitude.The research shows that under the impact load of aircraft landing,the transient radiation noise of the deck decreases with the increase of load pulse width and increases with the increase of load amplitude.What’s more,the peak value of radiation noise is mainly concentrated in the low-frequency band.