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Flap-lag-torsional dynamics of extensional and inextensional rotor blades in hover and in forward flight (1982)

Dasilva, C.

In: CASI

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Publication Date: 2019-07-13

Description: The reduction of the O(cu epsilon) integro differential equations to ordinary differential equations using a set of orthogonal functions is described. Attention was focused on the hover flight condition. The set of Galerkin integrals that appear in the reduced equations was evaluated by making use of nonrotating beam modes. Although a large amount of computer time was needed to accomplish this task, the Galerkin integrals so evaluated were stored on tape on a permanent basis. Several of the coefficients were also obtained in closed form in order to check the accuracy of the numerical computations. The equilibrium solution to the set of 3n equations obtained was determined as the solution to a minimization problem.

Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE

Type: NASA-CR-169159 , NAS 1.26:169159

Format: application/pdf

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