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Evaluation of an Advanced Suite of Numerical Codes for Structural Simulation of Parachute Fabric

机译:评估用于降落伞织物结构仿真的高级数字套件

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Parachutes are increasingly used to land space structures on Earth and other planets (e.g., Mars). Supersonic parachute deployment is a challenging fluid structure interaction (FSI) problem, and its physics-based computational simulation is a daunting task. A research collaboration between the Farhat Research Group (FRG) at Stanford University and the Jet Propulsion Laboratory (JPL) at the California Institute of Technology (Caltech) intends to assess the viability of a sophisticated suite of multi-physics codes, namely, the AERO Suite developed by FRG, and to enhance it further so that it can be exploited for simulating supersonic parachute deployment. This Suite features unique capabilities for the simulation of highly nonlinear FSI problems that have been verified and validated for related nonlinear aeroelasticity problems, and for underwater explosion and implosion problems. As part of the effort, a suite of purely structural mechanics and structural dynamics test problems (VERTS) relevant to parachute behavior has been developed for verifying AERO-S, the structural analyzer component of this software Suite. This paper summarizes the findings from the application of this verification test suite to AERO-S. Specifically, the study correlates the AERO-S VERTS results with analytical solutions (when available), results from other finite-element codes, and results reported in the literature. The reported VERTS results intend to highlight the existing capabilities of AERO-S and identify potential technology gaps to be incorporated into AERO-S during this collaborative effort.
机译:降落伞越来越多地用于在地球和其他行星(例如火星)上降落空间结构。超音速降落伞的部署是一个具有挑战性的流体结构相互作用(FSI)问题,其基于物理的计算模拟是一项艰巨的任务。斯坦福大学法哈特研究小组(FRG)与加利福尼亚理工学院(Caltech)喷气推进实验室(JPL)之间的研究合作旨在评估一套复杂的多物理场代码(即AERO)的可行性由FRG开发的套件,并对其进行了进一步增强,以便可以将其用于模拟超音速降落伞的部署。该套件具有用于仿真高度非线性FSI问题的独特功能,这些问题已针对相关的非线性气动弹性问题以及水下爆炸和内爆问题进行了验证和验证。作为工作的一部分,已经开发了一套与降落伞行为有关的纯结构力学和结构动力学测试问题(VERTS),用于验证该软件套件的结构分析器组件AERO-S。本文总结了将该验证测试套件应用于AERO-S的发现。具体来说,该研究将AERO-S VERTS结果与解析解(如果可用),其他有限元代码的结果以及文献中报告的结果相关联。所报告的VERTS结果旨在强调AERO-S的现有功能,并确定在合作过程中将被并入AERO-S的潜在技术差距。

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