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基于索膜有限元模型的翼伞气动变形仿真

汪龙芳 贺卫亮

汪龙芳, 贺卫亮. 基于索膜有限元模型的翼伞气动变形仿真[J]. 北京航空航天大学学报, 2017, 43(1): 47-52. doi: 10.13700/j.bh.1001-5965.2016.0017
引用本文: 汪龙芳, 贺卫亮. 基于索膜有限元模型的翼伞气动变形仿真[J]. 北京航空航天大学学报, 2017, 43(1): 47-52. doi: 10.13700/j.bh.1001-5965.2016.0017
WANG Longfang, HE Weiliang. Parafoil aerodynamic deformation simulation based on cable-membrane finite element model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(1): 47-52. doi: 10.13700/j.bh.1001-5965.2016.0017(in Chinese)
Citation: WANG Longfang, HE Weiliang. Parafoil aerodynamic deformation simulation based on cable-membrane finite element model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(1): 47-52. doi: 10.13700/j.bh.1001-5965.2016.0017(in Chinese)

基于索膜有限元模型的翼伞气动变形仿真

doi: 10.13700/j.bh.1001-5965.2016.0017
详细信息
    作者简介:

    汪龙芳,男,博士研究生。主要研究方向:飞行器设计

    通讯作者:

    贺卫亮,男,博士,研究员,博士生导师。主要研究方向:飞行器设计。E-mail:heweiliang@buaa.edu.cn.

  • 中图分类号: V215.3+2

Parafoil aerodynamic deformation simulation based on cable-membrane finite element model

More Information
  • 摘要:

    对定常状况下翼伞的流固耦合变形问题进行了三维数值模拟。使用有限体积法计算了飞行时的气动载荷,分析了前缘切口和翼肋开孔对压强分布的影响;基于翼伞结构大位移小应变的特点建立了非线性索膜有限元模型,伞衣由不能承受弯矩的膜单元模拟,伞绳和切口加强带由只能单向拉伸受力的索单元模拟,仿真了受气动载荷后翼伞相对于理想设计位置的变形和应力分布。结果表明:该翼伞展长相对于设计值减小,“鼓包”形成后翼型最大厚度增大,伞衣变形后产生了额外的后掠角和攻角;最大等效应力主要集中在翼肋上的开孔和伞绳连接点处,需合理布置加强带以满足强度要求。

     

  • 图 1  翼伞的理想外形

    Figure 1.  Ideal configuration of parafoil

    图 2  流体网格弦向剖面

    Figure 2.  Chordwise cross-section of fluid meshes

    图 3  中部气室弦向剖面的压力分布云图

    Figure 3.  Pressure distribution contours of chordwise cross-section of middle air chamber

    图 4  边缘气室内腔速度矢量

    Figure 4.  Interior velocity vector of bilateral air chamber

    图 5  翼伞外表面压力分布云图

    Figure 5.  Pressure distribution contours of exterior surface of parafoil

    图 6  开口附近的加强带

    Figure 6.  Reinforcing tape around opening

    图 7  翼伞结构网格示意图

    Figure 7.  Sketch map of structural meshes of parafoil

    图 8  翼伞位移分布云图

    Figure 8.  Displacement distribution contour of parafoil

    图 9  翼伞变形正视图

    Figure 9.  Front view of parafoil deformation

    图 10  飞行中的仿真对象

    Figure 10.  Simulation object in flight

    图 11  变形后翼伞外表面压力分布云图

    Figure 11.  Pressure distribution contours of exterior surface of deformed shape of parafoil

    图 12  翼肋的等效应力云图

    Figure 12.  Equivalent stress contours of ribs

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出版历程
  • 收稿日期:  2016-01-05
  • 录用日期:  2016-02-29
  • 网络出版日期:  2017-01-20

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