Double-layer shell titanium alloy deflector shroud acoustic three-dimensional control method

Abstract

The invention discloses a double-layer shell titanium alloy deflector shroud acoustic three-dimensional control method. The double-layer shell titanium alloy deflector shroud acoustic three-dimensional control method comprises the following steps of, firstly, determining the spatial range of an acoustic window according to agreed horizontal scanning angle and vertical angle of pitch and under thecondition that mold lines are determined; secondly, performing structure optimization on an acoustic cavity, specifically, arranging and computing the structure of non-acoustic transmission areas according to the determined range of the acoustic window; thirdly, performing acoustic modeling calculation according to the material and structure of the acoustic window; fourthly, performing vibration and noise reduction design inside the acoustic cavity, emphatically controlling the noise within the working frequency range of a sonar, applying sound absorbing materials and vibration and noise reducing materials onto the rear wall of the acoustic cavity, a sonar mounting platform and a bottom non-acoustic transmission area. The double-layer shell titanium alloy deflector shroud acoustic three-dimensional control method integrates multiple disciplines and combines engineering practical experience, thereby being high in systemic performance and operability and providing an effective engineering method for acoustic control of a bulbous bow deflector shroud.

Description

technical field [0001] The invention relates to a ship structure, in particular to a three-dimensional acoustic control method for a double-layer shell titanium alloy dome, which is suitable for the acoustic design of a bulbous bow dome. Background technique [0002] The bulbous bow of the ship is the working compartment of the bow sonar, and the window for anti-submarine warfare to detect underwater. The bulbous bow structure with excellent performance and long service life is an important guarantee for the anti-submarine warfare capability of the ship. The dome structure of the bulbous nose has always been a difficult point in ship design. It is necessary to ensure the hyperbolic shape of the hull and structural performance, and to achieve its good sound transmission function. The successful application of domestic XXXA titanium alloy dome has opened a new era of application of titanium alloy dome for surface ships. The titanium alloy shroud has the advantages of high str...

AI Technical Summary

Problems solved by technology

Usually, the smaller the scale of the ship, the greater the linear curvature of the bulbous nose area, and the more difficult it is to ensure the sound transmission effect; the smaller the scale, the closer it is to the main noise sources such as the propeller and the main engine, and the more difficult it is to control the self-noise

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