蝉翼结构静力学仿真和力学性能分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Structural Simulation and Finite Element Analysis of a Cicada’’’’s Wings

Author(s):: Xu He; Yang Yi; Lei Zhipeng; School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, Guangdong, 510640

Keywords:: cicada’s wing; structural simulation; numerical analysis; mechanical property; modal analysis

摘要:: 在分析蝉翼结构特征的基础上,采用有限元法对主翅结构进行了仿真分析,研究各部位截面和刚度对结构力学性能的贡献.基于矢量工具和造型软件,使用Beam189单元和Shell93单元构建能反映蝉翼主要特征的有限元模型,然后对滑翔状态下蝉翼的力学性能进行仿真分析.发现蝉翼整体呈翘曲状,最大变形和最大应力均分布在后翅脉附近.比较各类翅脉的最大变形量可知,前、中、后3种翅脉对蝉翼刚度的贡献呈递减趋势,其中前翅脉为蝉翼提供主要的刚度.并改变质量系数对蝉翼进行模态分析,分析基频的变化,论证加固尾脉对颤振的抑制效果.

Abstract:: Based on vector tools and modeling software,this paper analyzed and summarized the structure characteristics of cicada’s wings.And then the element Beam189 and element Shell93 were used to construct finite element model which could reflect the main characteristics of cicada’s wings.The mechanical properties of cicada’s wings in gliding state were simulated and analyzed.In that state,the whole structure of cicada’s wings was found warping shape,and the maximum deformation and stress were close to the far nervure.With the change of sectional size of all kinds of nervure in same ratio,comparative calculation was done to obtain the maximum deformation of the corresponding cicada’s wings.The results showed that the increasing of cicada’s wings’ deformation corresponding to three kind nervure were 121.3％、34.8％、17.4％ respectively,so their contribution to the stiffness decreased.Among them,front nervure provided main stiffness for cicada’s wings.With the change of the quality coefficient of reinforcement nervure,modal analysis was done to analyze the fundamental frequency changes which could prove suppression effect of reinforcement nervure on flutter.When the quality coefficient of reinforcement nervure was 22,the fundamental frequency decreases about 30％.