蜻蜓翅膀结构刚度有限元分析

摘要

The dragonfly wings were taken as the study objects, CAD and finite element analysis software ANSYS were applied to establish the finite element model of dragonfly wings. Through static analysis, the main vein structure was determined as load-bearing structure in dragonfly wings, the main vein and secondary veins coordinating so as to make the overall structure more reasonable. According to the characteristics of dragonfly wings wrinkled structure, the mesh model of rectangular and staggered quadrilateral fold structure was established, different mechanical properties under load were analyzed. The results showed that under the same uniform load, the greater the height of wrinkling was, the smaller structural deformation, and the greater structural stiffness would be. The analysis of quadrilateral mesh ( no membrane) model in a different uniform deformation under load of the trend can be seen in the same wrinkle height, as the load increased, the deformation also increased, but as the wrinkle height increased, and with the smaller amount of deformation of the load increased, the quadrilateral mesh stiffness of the structure became slightly larger than staggered quadrilateral mesh structure. Under the same load, the deformation of a membrane mesh structure was always less than no membrane mesh structure.%以蜻蜒翅膀为研究对象,应用CAD和有限元分析软件ANSYS建立蜻蜒翅膀的有限元模型,通过静力学分析确定:蜻蜓翅膀脉络结构中主脉为主承力结构,主脉与次脉协调作用,使整体结构更为合理.根据蜻蜓翅膀起皱结构的特点,建立四边形、交错四边形两种褶皱结构网格模型,分析不同载荷作用下的力学性能.结果表明:相同均布载荷作用下,起皱的高度越大,结构变形量越小；在相同的起皱高度下,随着载荷的增加,变形量也随之增加,但起皱高度越大,随载荷增大的变形量越小,同时四边形网格结构的刚度稍大于交错四边形网格结构；在相同载荷作用下,有膜网格结构的变形量总是小于无膜的网格结构.