柔性飞艇气动与变形耦合的数值模拟  

Coupling Computation of Aerodynamic and Deformation of Elastic Structure Airship

作　　者：刘芳[1] 李栋[1] 李振[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710000

出　　处：《航空计算技术》2009年第4期91-93,97,共4页Aeronautical Computing Technique

摘　　要：软式飞艇在低充气内压和来流共同作用下,其整体结构刚度较小,应视为柔性体。飞艇所产生的柔性变形和流场之间的耦合已经成为大家越来越关注的问题。提出了一种解决充气飞艇囊体结构变形与流场变化之间耦合问题的方法,其中流场计算采用SIMPLE算法,固体变形计算采用静力非线性算法。结果表明:在零攻角条件下,飞艇的柔性变形对流场特性的影响不明显,由于气动载荷的作用,导致囊体内外压差产生变化,从而导致应力分布的变化,使得艇首系留部位加强和腰部撕裂强度之类的问题更加突出。Under the effect of low inner pressure and ambient flow, the blimp with low rigidity can be taken as an elastic structure. The coupling computation of Ambient Flow and Elastic Deformation has become an important problem. In this thesis, a new method of solving this coupling has been developed using the SIMPLE arithmetics for flow field compu- tation and the static- nonlinear element analysis for calculating the deformation. The results show that, when the angle is 0° ,the Elastic Deformation has a wake influence on the flow field;because of the aerodynamic pressure, the differential pressure changes, the distribution of stress changes too, which extrude the problems such as the reinforcement of the moorage part at the bow, and tear strength at the middle.

关 键 词：飞艇 柔性体 流固耦合 气动 应力 

分 类 号：V211.54[航空宇航科学与技术—航空宇航推进理论与工程]