Novel high-speed train shock-absorption and noise-reduction floor structure

Abstract

A novel high-speed train shock-absorption and noise-reduction floor structure belongs to the field of high-speed train floor devices with both shock absorption and noise reduction functions. Steel wire mesh shock absorbers of which the shock absorption frequency is of a wide range and is continuously adjustable are adopted as main shock absorption and noise reduction components. Because of the full-range shock absorption capacity and very wide temperature scope of application of the steel wire mesh shock absorbers in the radial and axial directions, the technical problem that the shock absorption effect of a wooden floor device is not ideal, a rubber mat noise reduction structure only adapts to a narrow shock absorption frequency range and the shock absorption and noise reduction performances are largely affected by temperature change can be completely overcome. In addition, sound insulation material, sound absorption material, high-performance damping material and other shock absorption and noise reduction devices with good performance are combined with the aluminum profile of the train body according to the new layout order and combination hierarchy, so that the weight of the train is reduced, and more superior damping and sound insulation performances are obtained. Therefore, the structure can better meet the high-standard technical requirement of high-speed trains for the train floor with both shock absorption and noise reduction functions.

Description

technical field [0001] The invention belongs to the field of floor devices for high-speed trains with dual functions of shock absorption and noise reduction, and in particular relates to a novel vibration and noise reduction floor structure for high-speed trains. Background technique [0002] Improving the noise reduction performance of the car body floor structure to the noise generated by the wheel-rail vibration is of great significance to improving the sound field environment in the car. [0003] Studies have shown that the structural noise caused by the structural vibration generated by the wheel-rail relationship of high-speed trains is transmitted to the interior of the train through the floor structure, and has become one of the main factors leading to the increase of interior noise. The main energy of the vibration noise is concentrated in the low-frequency band, but due to reasons such as unreasonable structural design or material performance defects, the existing ...

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Problems solved by technology

[0007] In order to solve the problem that the existing floor device based on the wooden beam structure cannot obtain the ideal vibration reduction effect due to its high rigidity, and the noise reduction structure based on the rubber pad has a narrow adjustable range of vibration reduction frequency and does not have a wide range of noise frequency adjustment range, and the properties of the rubber material are easily affected by temperature changes, and its shock-absorbing effect is rapidly attenuated in the high and low temperature environment

At present, the existing train floor structure has certain defects in suppressing the noise inside the car, and cannot well meet the technical problems of high-standard technical requirements proposed by high-speed trains for the train floor with dual functions of shock absorption and noise reduction. The invention provides a new type of high-speed train vibration and noise reduction floor structure

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