EFFECTIVE VIBRATION DAMPING ACROSS A BROAD TEMPERATURE RANGE

摘要

Assemblies, methods and systems useful for reducing the noise and vibration characteristics associated with hollow spaces or cavities of vehicles by positioning damping foam material within and spanning the space between a first substrate surface and a second substrate surface. The damping foam material is comprised of a first region and a second region, wherein the first region has an E′ value at −10° C. that is lower than the E′ value at −10° C. of the second region and an E′ value at 25° C. that is higher than the E′ value at 25° C. of the second region; and the second region has a variable cross-sectional width.

主权项

1. An assembly comprising a first substrate and a second substrate, wherein a surface of the first substrate and a surface of the second substrate face each other and define a space between the first substrate and the second substrate, and wherein a damping foam material is positioned within the space and spans from the surface of the first substrate to the surface of the second substrate, the damping foam material being comprised of at least one first region and at least one second region, wherein the first region has an E′ value at −10° C. that is lower than the E′ value at −10° C. of the second region; the first region has an E′ value at 25° C. that is higher than the E′ value at 25° C. of the second region; and the second region has a variable cross-sectional width.