Test and study on the sound insulation performance of lightweight flooring materials for urban rail transit vehicles
With the rapid development of urban rail transit vehicles and the improvement of residents'quality of life,the public has put forward higher requirements for vehicles in terms of environmental protection,energy conservation,quietness,etc.,and the vehicle flooring materials are also developing in the direction of lightweight.This article adopts the test method stipulated in the Measurement Specification to conduct sound insulation tests on three types of vehicle flooring,namely,aluminum honeycomb flooring,glued flooring and phenolic flooring,and two types of vehicle flooring cloth,namely plastic and rubber,in order to derive the sound insulation and noise reduction effects of different types of vehicle flooring and flooring cloth.It is found that the lightweight floor with thickness of 15-18 mm and surface density of about 10 kg/m2,and the PVC and TPU floor cloth with thickness of about 3 mm and surface density of about 3 kg/m2 can realize the effect of light weight and good sound insulation,which are ideal flooring materials for urban rail transit vehicles with speeds of 120 km/h or less.The relevant research could provide reference for the sound insulation and noise reduction design of urban rail transit vehicles,and assist to promote the development of urban rail transit towards a more environmentally friendly and energy-saving direction.
urban rail transitvehiclelightweightfloorsound insulation and noise reduction
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