Abstract
A new correlation is employed to calculate the second-order statistics of the response of lifting rotor blades with negligible bending stiffness in forward flight to excitations which are random functions of both space and time. Results obtained herein together with the rigid flapping solution delimit the range of the mean square properties of flexible blade response. The level of computation involved in obtaining these results supports our theoretical estimate which shows that a numerical solution of the meansquare properties of complex random response processes by the spatial correlation method is several hundred folds more efficient than any other method available in the literature. Further improvements in the computational efficiency of the method, not noted previously, are shown to be possible for specific classes of problems.
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