Abstract
This paper concentrated about the effect of both the pseudorandom or random vibration (wind waves) and aerodynamic forces on the wing of unmanned aerial vehicle, which brought the attention of specialists in this field during last years, the performance of wing is improved on a definitive solution for the vibration problems which cause failure in the wings of UAV. The distribution of stresses and distortions with aerodynamic loads is studied. Factors such as tension, pressure and shear stress showed on wing of UAVs due to vibration which caused the structure of wing to break down and then failure. The experimental study was carried out by using wing made of composite material (foam and cover by lamination plate), where airfoil type (NACA Clark y) installed inside wind tunnel of low velocity. It is found that the vibration acceleration at constant wind velocity with variation of attack angle of the wing, it is obtained the relationship between the acceleration and the frequency using the LABVEIW program which analyzed and identified the distribution of forces on the wing. The stress concentration areas is created and found under failure occurs, the aerodynamic force, torsion torque and magnitude of deformation is calculated. It is concluded that the close areas from the root wing (fixed end) is most likely to collapse or break.
Highlights
The use of Unmanned Aerial Vehicles (UAV) is increased at present time, it can be used in large application such as the photography, load transfer, crops agricultural and UAV which presented in the research field of airplane (Atkins, 2018, Jweeg et al, 2018)
Composite materials with continuous fibers are the most suitable option especially because of the requirements that must be provided in structure of UAVs, where must be high-strength and lightweight (Sethunathan et al, 2016, Splichal et al, 2015), these composites are reflected in the UAV industry
The most vitality of the irregular vibration waves begins from the wind such as, pseudorandom vibration and random vibration is moved which is non-deterministic, this means that behavior in the future response will be absolutely unexpected
Summary
The use of Unmanned Aerial Vehicles (UAV) is increased at present time, it can be used in large application such as the photography, load transfer, crops agricultural and UAV which presented in the research field of airplane (Atkins, 2018, Jweeg et al, 2018). Nguyen and co-workers (Triet et al, 2015), have presented theoretically the modeling and simulation of operations in the computational fluid dynamic problem (CFD) on the wing of the plane by using NACA 2412 airfoil at different velocity from 0 to 50 m/s Their results were analyzed using ANSYS Structural to determine the lift and drag forces and by using ANSYS Fluent, the pressure and velocity distribution was obtained on the wing surface. The results of the comparison showed a good consensus This model can be used in experimental design in the future.(Asthana et al, 2016, Rao, 2017) analyzed numerically, evaluation and optimization of the structural behavior for the wing of airplane. The vibration acceleration and the stresses distribution on the structure of the UAV wing was studied with difference wind velocity and angle of attack.This work illustrates the aerodynamic forces on the wing surface
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