Gliding flight is a common mode of dragonfly,the objective of the current research is to explore the effect of aerodynamics on the forewing of dragonfly during gliding flight,the folds of dragonfly's forewing cross sec-tion are selected to establish a simplified two-dimensional numerical model—pleated airfoil.The corrugated airfoils are acquired by using the unidirectional fluid-structure interaction calculation method and bidirectional fluid-struc-ture interaction calculation method. Numerical simulation indicate that deformation and stress of the folds increase gradually with the increase of the angle of attack,the cross section of the dragonfly's body part is larger than the cor-rugation of wing's edge at the same angle of attack.It should be noted that using the unidirectional fluid-structure in-teraction calculation method at small angle of attack and using the unidirectional fluid-structure interaction calcula-tion method at relatively large angle of attack,the distribution of stress of dragonfly's forewing is more reasonable ow-ing to the corrugation's contribution.%滑翔是蜻蜓常见的一种飞行模式,为探究蜻蜓滑翔时气动力对前翅的影响,选取蜻蜓前翅横截面的褶皱,建立适当简化的二维数值模型——褶皱翼型,对二维褶皱翼型进行了单向和双向流固耦合分析.结果表明:褶皱的变形和应力随着攻角的增大而逐渐增大,且在同一攻角下,越靠近蜻蜓身体部分的横截面褶皱,变形和应力越大,越靠近前翅展向的外沿,变形和应力越小,褶皱的存在使蜻蜓前翅在受载荷后力学分布更加合理.
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