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Robust Aeroelastic Optimization Of Composite Helicopter Rotor

Murugan, Senthil and Ganguli, Ranjan and Harursampath, Dineshkumar (2008) Robust Aeroelastic Optimization Of Composite Helicopter Rotor. In: EngOpt 2008 - International Conference on Engineering Optimization, Rio de Janeiro, Brazil, 01 - 05 June 2008, Rio de Janeiro, Brazil.

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A robust aeroelastic optimization is performed to minimize helicopter vibration with uncertainties in the design variables. Polynomial response surfaces and space-¯lling experimental designs are used to generate the surrogate model of aeroelastic analysis code. Aeroelastic simulations are performed at the sample inputs generated by Latin hypercube sampling. The response values which does not satisfy the frequency constraints are eliminated from the data for model ¯tting. This step increased the accuracy of response surface models in the feasible design space. It is found that the response surface models are able to capture the robust optimal regions of design space. The optimal designs show a reduction of 10 percent in the objective function comprising six vibratory hub loads and 1.5 to 80 percent reduction for the individual vibratory forces and moments. This study demonstrates that the second-order response surface models with space ¯lling-designs can be a favorable choice for computationally intensive robust aeroelastic optimization.

Item Type: Conference Paper
Keywords: Helicopter aeroelasticity;Response surface;Latin hypercube; Material uncertainty;Vibration reduction;Robust optimization.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 29 Sep 2011 10:07
Last Modified: 29 Sep 2011 10:07
URI: http://eprints.iisc.ac.in/id/eprint/40949

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