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Richard Shepherd - Jose Rios - Bruk Sahilu
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Mission: Team Airwolf is set to test the
stresses applied to a Helicopter Rotor Blade as it rotates about an axis
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Measure the forces acting on a helicopter rotor blade by: Making a free body diagram of the entire
rotor blade machine. Use analytical techniques to calculate
external forces. Apply the principles of Dynamics to a 3D
rotor blade using Solidworks, and Nastran4D
Make design decisions based on simulations that apply Newtons’ Laws
Design Recommendations
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Design:
First, the airfoil shape was sketched using Solidworks. A simple extrusion provides a rotor blade.
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Design:
Then, two cones were drawn at the base to provide an anchor contact surface and a contact point for the pitch rod to attach.
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Design:
Then, the blades will all connect to this rotor hub/shaft.
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Design: After making a few smaller connecting parts it is
possible to generate an assembly of the complete rotorhead. The model is now ready to be imported into Nastran 4D.
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Design: And finally, FEA analysis was performed on
the blades.
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Results:
The stresses are concentrated at the base of the rotor blades as to be expected. This is due to a combination of the weight of the blades hanging as a cantilever along with the centripetal accelerations accumulating into concentration points nearer to the hub.
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Future Missions:
Potential Lift Variable Actuators Blade Collision
Jose J. Granda, Ph.D.
The End