フーリエ変換法による過渡応答解析 : 1報,初期条件を満たすフーリエ変換法の多自由度系への拡張

概要

論文の詳細を見る
It is presented that a method, in which the Fourier transform is modified so as to satisfy initial conditions, is applicable to the seismic analysis of the multi-degree-of-freedom system. Errors imperatively caused by the discrete Fourier transform are investigated in detail and the main part of errors seems to be eliminated by imposing initial conditions on the response. If the natural frequency is in a region of quite low, the error gets larger as the damping ratio becomes smaller. When the damping ratio becomes much smaller than 1%, it seems that a natural frequency f_0, if f_0 has a relation to observation time employed by the discrete Fourier transform.
1985-12-25