Vibration damping and noise reducing flexible sandwich plate for ship structure

Abstract

The invention discloses a vibration damping and noise reducing flexible sandwich plate for a ship structure. The vibration damping and noise reducing flexible sandwich plate for the ship structure comprises a framework, an inner face plate, an outer face plate and a flexible sandwich layer; the flexible sandwich layer is arranged between the inner face plate and the outer face plate; the inner face plate and the outer face plate which cover two openings of the framework are connected with the framework. The vibration damping and noise reducing flexible sandwich plate for the ship structure is characterized in that adhesive layers are arranged on opposite surfaces of the inner face plate and the outer face plate; the flexible sandwich layer is formed by cylindrical corrugated thin shell flexible structural bodies which are distributed in an equally spaced mode; two end surfaces of the cylindrical corrugated thin shell flexible structural bodies are connected with the inner face plate and the outer face plate through the adhesive layers respectively. The vibration damping and noise reducing flexible sandwich plate for the ship structure has the advantages of replacing a traditional ship outer casing rib structure, integrating a ship shell body structural function and a vibration damping and noise reducing function, improving the damping effect by more than 5 dB and improving the sound insulation effect by 10 dB compared with a traditional ship outer casing rib structure, maintaining the bearing capability of a ship casing structure and improving the hiding effect of the ship structure.

Description

technical field [0001] The invention belongs to the technical field of hull structures, and relates to a sandwich panel for hull structures, more specifically, to a flexible sandwich panel for vibration and noise reduction hull structures. Background technique [0002] Professor Wang Zili of Jiangsu University of Science and Technology published an academic paper titled "Design of Crashworthiness of Single-hull Hull Structure Based on Sandwich Plates": Under the premise of equal mass, use sandwich plates instead of hull plates and frames (longitudinal bones or ribs). The specific description is as follows: the upper and lower skins of the sandwich plate replace the outer plate of the hull, and the outer plate of the hull is the main energy-absorbing component. The replacement of the outer plate of the hull by the sandwich plate can make full use of the excellent energy-absorbing characteristics of the sandwich plate, which shows that the sandwich plate is used in ships and s...

AI Technical Summary

Problems solved by technology

[0006] In order to improve the acoustic stealth performance of ships, anechoic tiles or sound insulation decoupling structures are often installed outside the ship hull at home and abroad, but the anechoic tiles or sound insulation decoupling structures installed outside the ship hull may fall off, and the noise reduction The tile or sound insulation decoupling structure is easy to age in seawater, which leads to a decrease in its vibration and noise reduction performance. These problems have affected the performance of the anechoic tile or sound insulation decoupling structure, and it has been difficult to solve so far

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