| 摘要 |
PURPOSE: To provide a shock-absorbing structure effective for reducing esp. a peak load when an impact load is applied to, for example, a structure under a floor of an airplane. CONSTITUTION: In a part under a floor of an airplane, a keel 1 extending crosswise and a rib 2 extending longitudinally are made of a fiber-reinforced plastic and crossed at a crossed part 3, and a notch 5 and bulge parts 6 are formed on the upper end of the rib 2 corresponding to the crossed part 3. The bulge part 6 is shaped into a circle or a long ellipse having a minor axis in the direction of a load. The notch 5 and the bulge parts 6 can be provided in the keel 1. |
