| 摘要 |
PURPOSE:To absorb multi-directional displacement by designing a membrane that three projections are formed on it crossing to each other at a point and the crossing section is constituted of many triangles. CONSTITUTION:Three wave forms 11, 12, 13 extending tri-directionally exists on a flat plate 9. They has the same width at an angle 120 deg. with each other and each of them has a sectional view of an isosceles triangle. The cross section 10 is constituted of many triangles A, B, C. As multi-directional expansion may be absorbed by the triangles at various included angles which make up the crossed section, multi-directional displacement can be absorbed. |
