Evaluation and Creation of Stiffness and Strength of Lightweight Deployable Membrane Structures

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420858
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: Okuizumi Nobukatsu 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (10321564)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 膜面展開構造物 / 剛性向上 / 波形矩形膜 / ジグザグ折り回転円形膜 / 加振実験 / 非線形FEM解析 / ソーラー電力セイル

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.

Free Research Field

展開構造物，振動工学，構造動力学