Effective vibration damping across a broad temperature range
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 DEG C that is lower than the E' value at -10 DEG C of the second region and an E' value at 25 DEG C that is higher than the E' value at 25 DEG C of the second region; and the second region has a variable cross-sectional width. 1. A kind of assembly, which comprises a 1st 2nd base plate and the base plate, the 1st and the 2nd surface of the base plate opposite the surface of the base plate the base plate and in the 1st and the 2nd space is defined between the base plate, in the space attenuation foam material and positioned in the surface of the base plate from the 1st 2nd steps to states the surface of the base plate, the stated attenuation foam material includes at least one area and at least a 1st 2nd regional, the in -10 the 1st region with [...] E 'value is lower than the in -10 the 2nd region with [...] E' value; said 1st region in the 25 with [...] E 'value is higher than the 2nd region in the 25 with [...] E' value; and said 2nd region has a varying cross-sectional width. 2. Assembly according to Claim 1, characterized in that the 2nd 1st base plate or the base plate is at least one of the thin metal or polymer panel. 3. According to the assembly of any of the foregoing claims, characterized in that the base plate is 1st the outer panel of the motor vehicle structure-related anti-collision device. 4. According to the assembly of any of the foregoing claims, characterized in that an anti-main, the anti-collision device comprises. 5. According to the assembly of any of the foregoing claims, characterized in that the base plate is 2nd outer plate for motor vehicle. 6. According to the assembly of any of the foregoing claims, characterized in that the area or a plurality of 2nd 2nd area is roughly from the 1st the surface of the base plate extends to the 2nd the surface of the base plate. 7. According to the assembly of any of the foregoing claims, characterized in that the area or a plurality of 2nd 2nd region has such cross-sectional shape, the cross-sectional shape is triangular, oval, circular, trapezoidal or diamond-shaped. 8. According to the assembly of any of the foregoing claims, characterized in that 1st in the various parts of the area area or a plurality of 2nd 2nd region located on at least two sides. 9. According to the assembly of any of the foregoing claims, characterized in that each part of the said 1st region in the area or a plurality of 2nd 2nd region on at least two sides of the positioning and contact. 10. A base plate used for the 1st and 2nd base plate in one or both of the vibration attenuation in the method, wherein the 1st 2nd base plate is fixed to the base plate and into the 1st 2nd and the surface of the substrate opposite the surface of the base plate the base plate and in the 1st and the 2nd space is defined between the base plate, said method includes the attenuation foam material positioned in the space, so that the stated attenuation foam material on the surface of the base plate from the 1st 2nd steps to states the surface of the base plate, the stated attenuation foam material includes at least one area and at least a 1st 2nd regional, the in -10 the 1st region with [...] E 'value is lower than the in -10 the 2nd region with [...] E' value; said 1st region in the 25 with [...] E 'value is higher than the 2nd region in the 25 with [...] E' value; and said 2nd region has a varying cross-sectional width. 11. A kind of assembly, the base plate having a surface in the base plate and is arranged on the surface of the expandable material, the expandable material provides damping after expansion of the foam material, the stated attenuation foam material includes at least one area and at least a 1st 2nd regional, the in -10 the 1st region with [...] E 'value is lower than the in -10 the 2nd region with [...] E' value; said 1st region in the 25 with [...] E 'value is higher than the 2nd region in the 25 with [...] E' value; and said 2nd region has a varying cross-sectional width. 12. Assembly according to Claim 11, characterized in that said expandable material in the through an extrusion molding is deposited on the surface of the substrate. 13. And 12 any assembly according to Claim 11, characterized in that said expandable material by means of an adhesive or mechanical apparatus to be attached to the surface of the substrate. 14. To 13 the assembly of any one according to Claim 11, characterized in that said expandable material comprises at least one thermoplastic polymer and at least one thermal activation type foaming agent. 15. To 14 any assembly according to Claim 11, characterized in that said expandable material is prepared by a co-extrusion molding is formed. 16. One kind is used for the motor vehicles in the closure panel assembly of the vibration attenuation system, the system including the outer panel of the motor vehicle structure and related to the anti-collision device of the anti-collision device is arranged on at least a portion of the expandable material, the expandable material in its expansion before contact with the anti-collision device, and the expandable material in the outer panel of the motor vehicle after expanding contact with inner surface of the structure, after expansion of the expandable material of the foam material provides damping, the stated attenuation foam material includes at least one area and at least a 1st 2nd regional, the in -10 the 1st region with [...] E 'value is lower than the in -10 the 2nd region with [...] E' value; said 1st region in the 25 with [...] E 'value is higher than the 2nd region in the 25 with [...] E' value; and said 2nd region has a varying cross-sectional width.