非線形系におけるモードパラメータの同定法に関する研究 : 1自由度非線形系の場合

概要

論文の詳細を見る
A new identification technique which makes it possible to evaluate modal parameters such as mass, stiffness and damping coefficient for the nonlinear single-degree-of-freedom system is proposed. The nonlinearity was assumed for the stiffness in terms of the polynomial of the amplitude or piecewise linear property to the amplitude. The technique is based on the fact that the nonlinearity was linearized by the describing function which was developed by the previous investigation. MSF and GDF functions, in which the effect of mass and stiffness, and viscous damping coefficient are independently described in the respective functions, were defined. When the technique was applied, the compliance obtained by the sinusoidal excitation of the system, existence of the nonlinearity and the nonlinearity of the stiffness could be identified in terms of MSF function, and the viscous damping coefficient in terms of GDF function. It was verified that the technique was capable of evaluating the modal parameters much more accurately than the conventional method.
社団法人日本機械学会の論文
1990-07-25