@techreport{oai:jaxa.repo.nii.ac.jp:00045062,
 author = {市川, 輝雄 and ICHIKAWA, Teruo},
 month = {Apr},
 note = {Aeroelastic instabilities caused by the coupling between a rigid rotor and a flexible tower of a horizontal axis wind turbine are considered in this paper. Equations of motion having periodic coefficients are derived with respect to the fixed frame of reference as well as the frame of reference moving with the rotor by assuming an aerodynamic force predicted by the quasi-steady blade element theory. The same equations can be applied to rotors of both downwind and upwind types. It is shown that the equations of motion with respect to an appropriate frame of reference have constant coefficients in cases where either the rotor or the tower stiffness is isotropic. Possible instabilities only in these cases are studied with the help of Routh’s criterion. Three kinds of instabilities, that is, the whirl flutter and the divergences of the first and second kinds, are predicted. The last of these is rather new., 資料番号: NALTR0804000, レポート番号: NAL TR-804},
 title = {プロペラ型ロータと支持構造の連成による空力弾性的不安定についての若干の考察},
 year = {1984}
}