| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a damping floor structure that can reduce the vibration of underfloor materials due to floor impact without increasing thickness of a floor structure.SOLUTION: A damping floor structure includes two or more horizontal members 2 disposed at intervals each other, underfloor materials 3 disposed on the horizontal members, and a damping material 4 disposed at the side of the horizontal members of the underfloor materials. The damping material is formed of a buffer layer stacked on the horizontal member side of the underfloor materials, and formed of a nonwoven fiber structural body, and a hard layer having the flexural rigidity larger than that of the nonwoven fiber structural body. The nonwoven fiber structural body contains wet heat adhesive fibers, and the fibers are fixed by fusion of the wet heat adhesive fibers. The damping material is disposed in the region occupying an area of 60% or more among the region in which the total of a dimensionless curvature based on the vibration mode shape found by the FEM analysis becomes 25 or more on the surface of the horizontal member side of the underfloor materials.</p> |
