Bionic Wing Creation Design Based On Foldable Hind Wings Of Migratory Beetles

Migratory beetles have excellent flight performance,moving seasonally from one occurrence to another over long distances and for long periods of time.When not in flight,it folds its hindwings under the sheaths to protect them and reduce the incidence of breakage;when in flight,it can rapidly expand its hindwings and has excellent environmental adaptability.In this thesis,we explored the morphology,macro/microstructure,and nanomechanical properties of their hind wings and wing veins and membranes of three migratory beetles,Ladybird beetle,golden tortoise,and star aspen,to reveal the relationship between different wing veins and the nanohardness of different positions of the same wing vein.The nano-hardness and elastic modulus between different wing veins and at different positions of the same wing vein were revealed;the three-dimensional coupled models of the hind wings of six beetles with different aspect ratios,wing shapes and wing vein structures were established by using the coupled bionic principle;the three-dimensional coupled models of the hind wings of migratory beetles were simulated and analyzed by using WORKBENCH,and their stresses and deformations were discussed;the take-off and flight patterns of the three beetles were obtained,and their The design of the bionic wing was carried out based on the three-dimensional coupled model of the beetle's hind wings by using the creation design method;the structural statics(uniform load)and aerodynamics(different angles of attack,flight speed and flutter frequency conditions)of the three bionic wings were simulated and analyzed by WORKBENCH and FLUENT,revealing the influence of the wing shape and wing vein structure on the The effect of wing shape and wing vein structure on flight performance is revealed.This thesis combines entomology,nanomechanics,mechanical design and engineering bionics to analyze the effects of different wing shapes and wing vein structures on the flight characteristics of three migratory beetle hindwings by using various testing techniques,which is a clear interdisciplinary and innovative approach.This thesis provides a technical reference for further design and research of bionic fluttering MAV.