高滑翔伞伞绳叉联结构优化设计  

Optimization Design of Split-Link Cord for High Gliding Parafoils

作　　者：谢建宇 李岩军[1] 陈子悦 余莉[1] XIE Jianyu;LI Yanjun;CHEN Ziyue;YU Li(Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China)

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《海军航空大学学报》2024年第3期337-342,356,共7页Journal of Naval Aviation University

基　　金：国家自然科学基金(11972192);飞行器环境控制与生命保障工信部重点实验室基金(XCA23006);飞行器先进设计技术实验室基金(XCA23048)。

摘　　要：为获得翼伞伞绳最优叉联结构设计方案,文章提出了1种高滑翔翼伞伞绳叉联结构的优化设计方法。首先,通过计算流体力学方法进行翼伞气动分析,确定最优气动性能时对应的伞绳安装角及翼伞伞衣气动载荷;然后,通过几何分析和受力分析,建立伞绳结点处的力系平衡方程及伞绳长度几何控制方程;最后,在满足伞绳结构安全的前提下,以伞绳总长度最小为优化目标,采用基于外罚函数和Davidon-Fletcher-Powell(DFP)算法原理的优化算法获得不同约束力条件对应的翼伞伞绳叉联点位置方案。优化结果表明:与优化前叉联方案相比,该方法伞绳长度可减小9.0%,阻力系数降低8.8%。此外,通过增加伞绳受力约束,可实现翼伞滑翔性能的进一步提高。In order to obtain the optimal design of the split-link cord structure of the parafoil rope,an optimization method of split-link cord design for high gliding parafoils is presented.Firstly,computational fluid dynamics method and theoretical methods are used to analyze the aerodynamic performance of two-dimensional and three-dimensional parafoils,respectively.The optimal cord installation angle is determined based on the optimal attack angle,where the best aerodynamic performance can be achieved.On this basis,the geometric analysis and mechanics analysis are performed to derive the equilibrium equations of cord mechanics and the equations of paracord length.Finally,the optimization algorithm based on the external penalty function method and Davidon-Fletcher-Powell algorithm(DFP)is established to determine the optimal split-link cord design corresponding to different structure safety coefficients with the minimum cord length as the optimization objective under structure safety.The results show that the cord length and drag coefficient can be reduced by 9.0%and 8.8%,respectively,compared with the cord design by previous empirical method,which is convinced to improve the gliding performance of parafoils.In addition,the parafoil performance is able to be further improved by adjusting the structure safety limits.

关 键 词：翼伞 叉联结构 计算流体力学 力学分析 

分 类 号：V244.216[航空宇航科学与技术—飞行器设计]