因果時間関数のフーリエ変換の性質を利用した宇宙構造物の周波数応答解析法 : 弾性変位に着目した大型宇宙構造物の線形振動解析方法に関する研究(その2)(一般講演)

概要

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In the design of large space structures, the elastic displacement which relates to stresses must be properly evaluated. Usually, mode superposition method which uses only elastic eigenmodes has been applied to the analysis because of its simplicity. In the previous paper, the authors proposed the alternative method in which the external forces are projected to elastic subspace by the projection matrices. This method was powerful for the direct time integration method. In this paper, the other method in the frequency domain is newly developed, where the characteristics of Fourier transform of causal time functions are considered. First, through the study on the characteristics of the impulse time response and frequency response functions of the rigid body displacement, it is clarified that the frequency response function of the rigid body displacement is expressed only by real values except for zero frequency. As a result, the frequency response function of elastic displacement is derived from only the imaginary part of frequency response function using Hilbert transform.
一般社団法人日本建築学会の論文
1994-03-15