A composite structural member for reducing noise and vibration in a ship cabin

Abstract

The invention discloses a composite structural member for reducing noise and vibration in a ship cabin., The member comprises a outer layer micro-perforated plate, a framework and an inner layer micro-perforated plate, all of which are connected through connecting parts and enclosing walls for a chamber. The outer layer micro-perforated plate and the inner layer micro-perforated plate are fixedlyconnected and combined into a double-layer micro-perforated cavity through a frame, and a plurality of rows of multi-layer particle dampers are fixedly connected on two side walls corresponding to the frame in the cavity through elastic connecting rods. The outer layer micro-perforated plate and the inner layer micro-perforated plate are fixedly connected to each other through a frame. The invention can optimize the sound absorption coefficient of the micro-perforated plate without changing the cabin structure, broaden the sound absorption frequency band, improve the sound absorption effect,reduce the vibration of the cabin structure, and create a good cabin working environment. Moreover, the invention has the advantages of compact structure and convenient installation. It has a good prospect of engineering application.

Description

technical field [0001] The invention relates to a noise-reducing and vibration-reducing structure, in particular to a sound-absorbing and vibration-isolating structure in complex noise environments in ship cabins. Background technique [0002] In recent years, my country's shipbuilding industry has developed rapidly, shipbuilding technology has become increasingly mature, and the demand for ship safety and comfort has greatly increased. Working for a long time and living in the cabin noise is easy to cause people's emotional irritability, affect people's work, endanger people's health, and vibration noise greatly endangers the safety of ship operation. With the continuous development of the shipbuilding industry, more and more attention has been paid to the problem of vibration and noise, and the requirements for vibration and noise reduction have continued to increase. [0003] All kinds of power mechanical equipment are arranged in the engine room of the ship to provide p...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the environmental characteristics of the noise sources in the engine room and the problems and defects of traditional sound-absorbing materials, effectively utilize the space in the engine room, optimize the ability of low-frequency noise reduction without changing the hull structure, and provide a A kind of noise-reducing and vibration-reducing composite structural parts for ship cabins that can reduce noise and improve vibration reduction

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