| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor panel structure of a car body capable of effectively reducing the vibrational energy of a floor panel and reducing acoustic radiation from the floor panel. SOLUTION: This floor panel structure of the car body constitutes a floor of an automobile by the floor panels 2, 6, 12 connected to a plurality of frame materials 22, 24, 27 to 32, etc. arranged in the car body longitudinal direction and in the car width direction, panel regions S1 to S4, S7, S8, S10 at least a part of which is surrounded by the frame members are formed in the floor panel, and in the panel regions of the floor panels, a high rigidity part 84 where the panel is projected upward or downward is formed on a central part of the panel regions, a low rigidity part 86 is formed around this high rigidity part, a damping material 88 is provided roughly in all of the region of the low rigidity part, and a cut out part 88c extending along the frame member at a position separated from the frame member is formed on this damping material. COPYRIGHT: (C)2006,JPO&NCIPI
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