摘要
The vibrational mode dependence of the aerodynamic forces (lift force, pitching moment) in flutter problems is discussed in this study. Rectangular models with cross sections having the slenderness ratio (chord/depth) 10 and 20 are investigated in wind tunnel tests. A new identification method of the aerodynamic derivatives, which are well-known description of flutter properties, is proposed by introducing an equivalent Theodorsen function. Applicability of these force to multiple-mode flutter analysis will be discussed.