摘要
降落伞充气展开过程是一个典型时变非线性流构耦合问题,大多研究所建立的数值计算模型未考虑织物透气性和初始投放速度的影响。为修正模型,基于任意拉格朗日-欧拉(arbitrary Lagrange-Euler,ALE)方法和动网格技术,考虑织物透气性并预设初始投放速度,建立了降落伞充气展开的有限元模型。计算了充气过程中,有限质量情况下C-9伞的开伞力,并与实验数据对比,验证了该模型的正确性与合理性。随后分析了其开伞过程中伞衣应力分布特征与气动减速特性,为降落伞数值建模和结构设计提供一定参考。
Parachute inflation-deployment process is a typical time-varying nonlinear fluid-structure coupling problem.The influence of fabric permeability and initial airdrop velocity is ignored in most numerical models.To modify the calculation model,a finite element model of parachute inflation process was established based on ALE(arbitrary Lagrange-Euler)method and dynamic mesh technology,while permeability and initial airdrop speed were presented.The parachute opening load of C-9 canopy was calculated under finite mass condition and compared to experimental data to verify the correctness and rationality of the model.The stress distribution and aerodynamic deceleration characteristics was analyzed subsequently,which provided some reference for parachute numerical modeling and structural design.
作者
陈晨
郭琪磊
CHEN Chen;GUO Qi-lei(Civil Aviation Flight University of China,Guanghan 618307,China)
出处
《科学技术与工程》
北大核心
2021年第2期801-807,共7页
Science Technology and Engineering
基金
四川省教育厅科研项目(18ZB0688)。
