| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In order to effectively increase the stiffness and strength of membrane deployable structures, the effects of making the membranes steric and sticking thin members on them were investigated. As basic examples, corrugated rectangular membranes and rotating corrugated circular membranes were studied and the effects of corrugations on their stiffness were examined by vibration experiments in vacuum and nonlinear finite element analysis. Then the structural property of the solar power sail membrane of IKAROS, which was a pressing subject related to this study, was investigated by nonlinear FEM. A stiffness improvement mechanism of steric deployed shape caused by the curvatures of thin film solar cells and the effects of thin members sticked on the membrane were revealed. Moreover, deployable membrane stiffening ribs were added on the membrane and the shape forming effect were demonstrated.
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