Dynamics of Inflatable Space Structure

充气空间结构动力学

基本信息

批准号：
12650897
负责人：
MIYAZAKI Yasuyuki
金额：
$ 2.37万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650897/
关键词：
membrane inflatable deployment structure dynamics fluid-structure interaction contact problem 柔軟宇宙構造物

项目摘要

A numerical analysis method of deployment dynamics of inflatable membrane structures is proposed, and the numerical code is developed. A mathematical model of self-contact of the membrane and the visco-elastoplastic model of the fold line of the membrane are proposed. The formulation of these models is implemented into the numerical code that has already been developed until last year. The wrinkling problem f the membrane is the most popular research topics in these years, and the problem analyzed in this research has not investigated by other researchers yet. However. That problem will be the most serious problem to fabricate the large membrane structures in near future.The results of this research are summarized as follows; (1) Numerical method of the dynamics of membrane with partial wrinkling is formulated and a numerical code is developed. This method enables us to perform the numerical time integration that exactly conserves the energy, the linear momentum, and the angular momentum, i.e. the time integration is unconditionally stable. This is the key numerical technology to calculate the dynamics of the membrane in zero-gravity condition that has been quite difficult. (2) A mathematical model of the interaction between the inflation gas and the membrane tube is constructed. This model also conserves the energy exactly, which leads the numerically stable integration. (3) The effect of the self-contact of the membrane is implemented into the numerical code. This is also the key numerical technology to obtain the accurate results of the simulation. (4) A visco-elastoplastic model of the fold of the membrane is constructed, which is necessary to simulate the generation and growth of the fold.The research shows that the dynamic behavior of membranes and inflatable membrane structures can be predicted numerically, which has been understood impossible. That is the most important result of this research.

提出了一种充气膜结构展开动力学数值分析方法，并开发了数值代码。提出了膜自接触的数学模型和膜折叠线的粘弹塑性模型。这些模型的制定被实施到去年已经开发的数字代码中。膜的起皱问题是近年来最热门的研究课题，而本研究分析的问题尚未被其他研究人员研究过。然而。这个问题将是在不久的将来制造大型膜结构最严重的问题。本研究的结果总结如下： (1)制定了局部起皱膜动力学的数值方法并开发了数值代码。这种方法使我们能够进行能量、线动量和角动量精确守恒的数值时间积分，即时间积分是无条件稳定的。这是零重力条件下膜动力学计算的关键数值技术，难度较大。 (2)建立了充气气体与膜管相互作用的数学模型。该模型还精确地守恒能量，从而导致数值稳定的积分。 (3)将膜的自接触效应实现到数字代码中。这也是获得准确模拟结果的关键数值技术。 (4)建立了膜褶皱的粘弹塑性模型，这是模拟褶皱产生和生长所必需的。研究表明，膜材及充气膜结构的动态行为可以进行数值预测，具有一定的应用前景。被理解为不可能。这是这项研究最重要的结果。