Design Method of Trailing Edge Structure of Rigid-flex Coupling Variable Curvature Wing Based on"Knuckle"Drive
The current deformed wing driven by rigid mechanism is prone to the phenomenon of non-smooth deformation of the skin.The deformed wing designed by the flexible mechanism has a smooth skin curve,which enhances the stability and maneuverability of the aircraft,but it is difficult to satisfy the double optimization of deformation and load bearing.In this regard,based on the design idea of"knuckle"-driven bionic rigid-flexible coupling,a three-"knuckle"-driven rigid mechanism of the trailing edge of a variable curvature wing driven by a six-rod of the Watt I type is designed.A topology optimization method of the flexible mechanism that can withstand aerodynamic loads and smooth deformation is also established.Firstly,a Watt I six-bar maneuvering mechanism driven by a single motor is designed.Then a variable density topology optimization method for the trailing edge of a deformed wing with"knuckle"type drive is improved.Next,a flexible trailing edge drive mechanism with three"knuckle"type rods is solved and presented.Finally,the optimized model is simulated with rigid-flexible body dynamics,aerodynamics and fluid-structure coupling.An experimental platform and a prototype model are constructed to demonstrate the feasibility of the flexible deformed wing and the effectiveness of its design method from both simulation and experiment perspectives.
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