Layered composite light acoustical material for rail train

Abstract

The invention relates to a layered composite light acoustical material for a rail train. The rail train adopts a multilayer structure which consists of an aluminum rail train aluminium section, an inner wall plate, and a heat preservation and flame retardant material between the aluminum rail train aluminium section and the inner wall plate. The layered composite light acoustical material is characterized by being arranged between the aluminum rail train aluminium section and the inner wall plate, wherein the acoustical material at least comprises a latticed rubber framework material layer. The layered composite light acoustical material also comprises a porous material layer or / and a damping layer. The layered composite light acoustical material and the inner wall plate are in an integrated structure. On the basis of an original heat preservation and flame retardant material applied to a carriage of a high-speed train, the novel composite material has the advantages that the properties of sound absorption, sound insulation and vibration reduction are good, and at the same time, less space in the carriage is occupied.

Description

technical field [0001] The invention belongs to the field of materials and structures, and can be directly applied to rail trains, such as the interior of high-speed railway carriages or other environments with strong noise requiring environmental protection. Background technique [0002] As an integration of contemporary high-tech, high-speed railway has comparative advantages such as large transport capacity, low energy consumption, low pollution, safety and comfort, and is the most sustainable and environment-friendly transportation mode in the transportation system. It is one of the concentrated manifestations and important symbols of the innovation capability of the manufacturing and manufacturing industries, the comprehensive national strength and the degree of national modernization. [0003] During the "Eleventh Five-Year Plan" period, my country's high-speed railway construction has achieved leapfrog development with the strong support of the state. With the openin...

AI Technical Summary

Problems solved by technology

The noise and vibration problems become more and more prominent after the speed of the train is increased, and it has become a key factor restricting the development of high-speed railway technology. The pollution of noise and vibration not only seriously affects the quietness of the train, the comfort of the passengers and the living environment of residents along the high-speed railway, but also It also leads to wear, fatigue and even failure of the main mechanical equipment of the train, which reduces the service life of the equipment and threatens the safe operation of the high-speed train

[0004] The existing high-speed rail usually adopts a double-layer structure, and the aluminum profile of the rail train and the inner wall plate are provided with heat-insulating and flame-retardant materials, and the sound and vibration isolation outside the train is not considered.

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