In this report, the gust responses of a three dimensional wing are investigated theoretically and experimentally i.e. the responses to the sinusoidal gust and the random gust are obtained theoretically and the both are compared with the experimental results respectively.
The responses to the sinusoidal gust are calculated by the method of lifting-line theory and the response functions are obtained for the wing of various aspect ratio. These results are compared to the experimental values which were obtained by the wind tunnel experiments for the wing of aspect ratio of 3.16. As the results, it is found that the both agree well with each other.
For the responses to the random gust, the power spectral density functions and the frequency transfer functions of the lift force of a wing are calculated with the method of lifting-line theory. In this case, it is considered that the gust varies along the wing span i.e. the reduced frequency along the wing span, k2, is introduced. Therefore, the frequency transfer functions have two variables and these results are compared with the experimental values and the both agree well with each other.
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