非定常不規則荷重を受ける構造物系の自乗平均応答（II）

概要

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A special class of nonstationary random excitation which acts upon a simple structural system is considered. The class of nonstationary random excitation is specified by the equation Y(t) = X(t)f(t) where X(t) is a stationary correlated noise process and f(t) is a diterministic intencity function. Author presents the covariance equation method for the mean square response and covariance it to structural system. Since this method is expressed by differential type, it is possible to analyze the nonstationary random probrem. When the stochastic propaties of X(t) are given by its autocorrelation function R(τ)=e￣｜β|τ cos Ωτ and f(t) is a unit step function and an exponential function, the solution of covariance equation is good agreement with an exact solution. In addition, this method easily caluculates the mean square response and covariance it for the displacement, velocity and acceleration.
長崎大学工学部,Faculty of Engineering, Nagasaki Universityの論文