http://swrc.ontoware.org/ontology#TechnicalReport
増速中の擾乱気流による非定常不規則応答からダイバージエンスとフラッタ限界の推定
ja
安藤 泰勝
松崎 雄嗣
ANDO Yasukatsu
MATSUZAKI Yuji
航空宇宙技術研究所
National Aerospace Laboratory(NAL)
航空宇宙技術研究所報告
898
1986-02
A locally stationary process method for predicting the flutter and divergence boundaries is presented. The method was applied to response signals of wing models due to flow turbulence measured in subcritical flutter and divergence tests, in which the dynamic pressure was increased at a constant speed with the Mach number being fixed. A long nonstationary response record was divided into many contiguous equally short intervals in which the response was assumed to be locally stationary. The random response was assumed to be represented by the autoregressive process. The parameters of the process were evaluated by Akaike’s automatic estimation procedure. The estimated values of Jury’s stability parameters in each interval are quite scattered. It is shown, however, that the stability boundaries can be predicted by drawing a straight line as the upper side of an envelope for the scattering estimated values of the stability parameters.
0389-4010
資料番号: NALTR0898000
レポート番号: NAL TR-898