Abst'/> Comparative finite element and experimental analysis of a quasi-static inflation of a thin deployable membrane space structure
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Comparative finite element and experimental analysis of a quasi-static inflation of a thin deployable membrane space structure

机译:薄型可展开膜空间结构准静态充气的比较有限元与实验分析

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AbstractThe deployment of a thin, one-segment, large membrane space structure is examined by the means of a real time quasi-static inflation experiment with photogrammetry and finite element analysis with the explicit and implicit schemes applied to control volume, corpuscular and arbitrary Lagrangian-Eulerian inflation methods. The numerical solutions comparison is based on mesh size, energy ratio, number of particles, bleed-through leak coefficient, fluid pressure - surface depth stiffness coupling, accuracy and computational efficiency. An optimization of the number of particles and minimization of the bleed-through effects is effectively implemented in corpuscular and ALE approaches. The corpuscular and arbitrary Lagrangian-Eulerian are found to be most resembling the experimental results in the dynamic shape changes and the time history of the gas properties, but computationally expensive. The control volume, although computationally efficient, is lacking the adequate fluid-structure interaction, thus less accurately recreating the overall dynamics of the morphing surface. Only 0.2%–1.75% and 0.5%–2.5% difference is observed between the experimental, analytical and finite element inflation results respectively.HighlightsWe model large, thin membrane space structure with control volume, corpuscular, arbitrary Lagrangian-Eulerian methods.We conduct real-time inflation experiments and analyze the structural behavior of the membrane.We analyze dynamic changes of the surface and compare them with experimental results.We study the most energetically stable mesh, optimize the number of air particles and reduce the bleed-through loss of air.We report relative difference between experimental andFEAresults.
机译: 摘要 通过实时的准静态膨胀实验检查薄的,单段大的膜空间结构的展开情况摄影测量和有限元分析,以及显式和隐式方案,用于控制体积,微粒和任意拉格朗日-欧拉膨胀方法。数值解决方案的比较基于网眼尺寸,能量比,颗粒数,渗漏泄漏系数,流体压力-表面深度刚度耦合,精度和计算效率。在微粒和ALE方法中,可以有效地实现粒子数量的优化和渗漏效应的最小化。在动态形状变化和气体特性的时间历程中,发现小球体和任意的拉格朗日-欧拉方程与实验结果最相似,但计算量大。控制体积尽管计算效率高,但缺乏足够的流体-结构相互作用,因此不太准确地重新生成变形表面的整体动力学。实验,分析和有限元膨胀结果之间的差异分别只有0.2%–1.75%和0.5%–2.5%。 < ce:abstract xmlns:ce =“ http://www.elsevier.com/xml/common/dtd” xmlns =“ http://www.elsevier.com/xml/ja/dtd” class =“ author-highlights” xml:lang =“ zh-CN” id =“ abs0015” view =“ all”> 突出显示 我们使用控制体积,微粒,任意拉格朗日-欧拉方法对大型的薄膜空间结构进行建模。 我们进行实时充气实验并分析膜的结构行为。 我们分析了表面的动态变化并将其与实验结果进行比较。 我们研究了能量最稳定的网格,优化了空气颗粒的数量并减少了 我们报告了实验结果与 FEA 结果之间的相对差异。

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