A flexible sandwich panel for vibration and noise reduction hull structure

Abstract

The invention discloses a flexible interlayer panel for vibration-reduction and noise-reduction hull structure, which includes a frame, an inner panel and an outer panel that cover two open ends of the frame and are connected to the frame, and a flexible interlayer arranged between the inner and outer panels, and is characterized in that: Adhesive layers are respectively arranged on the opposite surfaces of the inner panel and the outer panel; the flexible interlayer is composed of several equidistantly distributed cylindrical corrugated thin shell flexible structures, and the cylindrical corrugated thin shell Both ends of the flexible structure are respectively connected to the inner panel and the outer panel through the adhesive layer. The present invention replaces the traditional rib structure of the hull shell with a flexible sandwich plate, which combines the structural function of the ship hull and the function of damping and noise reduction. Compared with the rib structure of the traditional hull shell, the vibration reduction effect is improved by more than 5dB, and the sound insulation effect is improved by 10dB. The above; not only maintain the bearing capacity of the hull structure of the ship, but also improve the stealth effect of the hull 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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