Numerical simulation and control of flow-induced noise in composite sandwich sonar dome
During the voyage,the flow-induced noise caused by the interaction between the submarine wall and the sur-rounding flow field will cause serious harm to the sound transmission window structure.Therefore,it is of great significance to effectively control the flow-induced noise.First of all,the statistical energy method is used to predict the flow-induced noise of the submarine bow model,and the influence law of convection-induced noise of different materials is obtained ac-cording to the different speed and the distance from the front end of the turbulent layer.Secondly,according to the require-ments of low noise and high sound transmission of the sonar dome,a three-layer composite sandwich structure design is pro-posed,and four kinds of laying schemes are compared and analyzed through the selection of damping materials and the design of four kinds of lamination schemes.Finally,it is concluded that when the laying scheme is carbon fiber/damping material 2/Titanium alloy and the thickness of the layer is 10 mm/10 mm/3.55 mm,it is the best scheme with good noise re-duction performance and strong sound permeability,which provides an important reference value for practical application.
statistical energy methodflow-induced noisesonar domecomposite sandwich structure
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