Abstract
A general method is developed to evaluate the nonstationary response of a linear damped system subjected to a random excitation which is represented as the product of a modulating deterministic function and a white noise process. An approximate solution method is presented first by means of a step-by-step procedure; then this method is shown to be able to generate a differential equation for the time variation of the mean square response. Stability and accuracy of the step-by-step procedure are discussed in detail, and compared with other methods. Extension to multidegree of freedom and nonlinear systems are discussed.
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