非定常ランダム振動解析に対する位相傾斜の確率特性の応用に関する基礎的研究

概要

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Mathematical model of nonstationary random excitation is, in many cases for convenience' sake, expressed by the product of a stationary random excitation and an amplitude modulating function. In those cases, spectral content of modulated excitation may differ notably from that of unmodulated. Therefore, amplitude modulation method doesn't seem suitable for the nonstationary random vibration analysis, in which the frequency characteristic of an excitation is taken into serious consideration. In this study, it is verified that the intensity distribution of a nonstationary excitation is dependent on the phase inclination of that excitation. By making use of the probability characteristics of phase inclination, mean and mean square as well as auto-correlation functions of nonstationary random excitation are derived in the explicit form and are applied to the random vibration analysis of SDF linear oscilator.
社団法人日本建築学会の論文
1986-07-30