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Application of metallic foam in the rail car
Feb 18, 2017

Porous metal is processed by special high permeability of porous material, from the inside to the outside is as a sponge-like structure. Cause pores in the sound from the surface into the air and material fines vibration through friction and viscous drag, turn the sound energy into heat energy is absorbed. Metal foams and other sound-absorbing material for comparison with low frequency domain high sound absorption characteristics, according to the different thickness of the air layer, involving large-scale low frequency area displays excellent sound-absorbing effect. High rail trains box for the sound-absorbing not only better acoustic performance than traditional polyester material, good resistance to deformation properties, has a good energy absorption, high strength, does not burn, increases the security of transport equipment and materials harmless, more in line with the environmental standards.