ANALYTICAL SOLUTION FOR STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS

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ZARE H.; Bighashdel A.; POURTAKDOUST S.H.

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Seminar Paper

Paper Information

Seminar: CONFERENCE OF IRANIAN AEROSPACE SOCIETY
Year:2016 | Issue:15

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Title

ANALYTICAL SOLUTION FOR STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS

Author(s)

ZARE H. | Bighashdel A. | POURTAKDOUST S.H. | Issue Writer Certificate

Keywords

ANALYTICAL SOLUTION

STRUCTURAL DYNAMICS

FLAPPING WING

MODAL ANALYSIS

Abstract

AN ANALYTICAL SOLUTION FOR THE STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS UNDERGOING PRESCRIBED RIGID BODY MOTION IS PRESENTED. THE GOVERNING EQUATION OF ELASTIC WING STRUCTURE IS OBTAINED USING THE GALERKIN METHOD AND RITZ APPROXIMATION. DUE TO IMPORTANCE OF DERIVING AN ANALYTICAL SOLUTION, ONLY INERTIAL FORCES DUE TO THE ACCELERATED MOTION ARE CONSIDERED. THE PRESCRIBED RIGID BODY MOTION IS CREATED VIA A SERVO MOTOR WITH HAVING A 2ND ORDER DYNAMICS. THE RESULTING ANALYTICAL SOLUTION, ENABLES ONE TO ASSESS THE COUPLING BETWEEN CONTROL, STRUCTURE AND INERTIAL FORCES. INCLUSION OF THE SERVO MOTOR DYNAMIC AND ITS ANALYSIS SHOW A DELAY AS WELL AS A CHANGE IN THE MOTION AMPLITUDE AS TO ITS EFFECT. WITH THE AID OF THE ANALYTICAL SOLUTION, THE DAMPING PROPERTIES OF THE STRUCTURE, THE RESONANCE PHENOMENA AND ITS OCCURRENCE PREREQUISITE HAVE ALSO BEEN INVESTIGATED. FINALLY, A COMPLETE FLAPPING FLIGHT SCENARIO IS SIMULATED. FOR THIS SIMULATION SCENARIO, A RECTANGULAR WING IS MODELLED USING ELASTIC BEAM AND SHELL ELEMENTS THAT IS UNDER PRESCRIBED SINUSOIDAL FORCING. BECAUSE OF THE WING’S SIMPLICITY, THE STRUCTURAL MODAL PROPERTIES SUCH AS NATURAL FREQUENCIES AND MODE SHAPES ARE COMPUTED USING FEM ANALYSIS. RESULTS ALSO STRONGLY DEMONSTRATE THE SIGNIFICANCE OF INERTIAL FORCES IN STRUCTURAL DEFORMATIONS.

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APA: Copy

ZARE, H., Bighashdel, A., & POURTAKDOUST, S.H.. (2016). ANALYTICAL SOLUTION FOR STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS. CONFERENCE OF IRANIAN AEROSPACE SOCIETY. SID. https://sid.ir/paper/947957/en

Vancouver: Copy

ZARE H., Bighashdel A., POURTAKDOUST S.H.. ANALYTICAL SOLUTION FOR STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS. 2016. Available from: https://sid.ir/paper/947957/en

IEEE: Copy

H. ZARE, A. Bighashdel, and S.H. POURTAKDOUST, “ANALYTICAL SOLUTION FOR STRUCTURAL DYNAMICS OF ELASTIC FLAPPING WINGS,” presented at the CONFERENCE OF IRANIAN AEROSPACE SOCIETY. 2016, [Online]. Available: https://sid.ir/paper/947957/en

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