A Computational Framework for Parachute Inflation Based on Immersed Boundary/Finite Element Approach  

一种基于浸没边界/有限元方法的降落伞充气计算框架

作　　者：HUANG Yunyao ZHANG Yang PU Tianmei JIA He WU Shiqing ZHOU Chunhua 黄云尧;张扬;濮天梅;贾贺;武士轻;周春华(南京航空航天大学航天学院,南京211106;航天科技集团航天进入减速与着陆技术实验室,北京100094;扬州大学电气与能源动力工程学院,扬州225127;北京空间机电研究所,北京100096;南京航空航天大学航空学院,南京210016)

机构地区：[1]College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,P.R.China [2]Laboratory of Aerospace Entry,Descent and Landing Technology,CASC,Beijing 100094,P.R.China [3]College of Electrical,Energy and Power Engineering,Yangzhou University,Yangzhou 225127,P.R.China [4]Beijing Institute of Space Mechanics and Electricity,Beijing 100096,P.R.China [5]College of Aeronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2024年第4期502-514,共13页南京航空航天大学学报（英文版）

基　　金：supported by the Open Project of Key Laboratory of Aerospace EDLA,CASC(No.EDL19092208)。

摘　　要：A computational framework for parachute inflation is developed based on the immersed boundary/finite element approach within the open-source IBAMR library.The fluid motion is solved by Peskin's diffuse-interface immersed boundary(IB)method,which is attractive for simulating moving-boundary flows with large deformations.The adaptive mesh refinement technique is employed to reduce the computational cost while retain the desired resolution.The dynamic response of the parachute is solved with the finite element approach.The canopy and cables of the parachute system are modeled with the hyperelastic material.A tether force is introduced to impose rigidity constraints for the parachute system.The accuracy and reliability of the present framework is validated by simulating inflation of a constrained square plate.Application of the present framework on several canonical cases further demonstrates its versatility for simulation of parachute inflation.基于开源IBAMR库中的浸没边界/有限元方法,开发了一个用于模拟降落伞充气的计算框架。流体运动采用Peskin的扩散界面浸没边界(Immersed boundary,IB)方法进行求解,该方法适用于模拟涉及大变形的动边界流动。采用自适应网格细化技术,以降低计算成本,同时保持所需的网格分辨率。降落伞的动态响应通过有限元方法求解,降落伞系统的伞衣和伞绳采用超弹性材料建模。通过引入牵引力对降落伞系统施加刚性约束。利用受约束的方板充气过程验证了该框架的准确性和可靠性。该框架在多个典型算例中的应用进一步展示了其在降落伞充气模拟中的多功能性。

关 键 词：parachute inflation fluid-structure interaction immersed boundary method finite element method adaptive mesh refinement 

分 类 号：V411[航空宇航科学与技术—航空宇航推进理论与工程]