充气薄膜结构的SMS展开分析方法

A spring-mass system based approach for deployment analysis of inflatable membrane structures

摘要:

为有效分析充气薄膜结构的展开,提出基于能量原理分析充气薄膜结构展开的SMS方法,即弹簧-质点系统方法.对卷曲折叠充气直管采用SMS方法进行数值模拟,并与实验结果进行对比分析,发现其结果吻合良好,验证了这种方法的正确性.运用SMS方法分析不同充气速率对卷曲折叠充气管展开过程的影响以及充气圆环管和充气膜面的展开过程及动力性能.与传统的有限元方法比较,SMS方法建模简单,思路清晰,数值稳定性好.

Abstract:

This paper presents a general method that is based on spring-mass system (SMS) for deployment analysis of inflatable membrane structures.Firstly,the inflatable deployment of the coil-folded tube was simulated by SMS method.The inflatable deployment experiment on an air track was conducted,and the results agreed well with those of the numerical method.Secondly,the influence of inflation rate on deployment dynamics characters was discussed and the results demonstrated that variations of inflation rate had a great influence on the deployment process.Finally,the deployment processes of toroidal inflatable boom and inflatable membrane were researched.Compared with conventional finite element methods,the SMS based method provides more flexibility for solving deployment analysis of inflatable membrane structures.