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Analysis of Nonstationary Random Vibrations

by Karl Popp, Univ of Hannover, Germany,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

Nonstationary random vibrations occur in structural mechanics as well as in vehicle dynamics. Very often the nonstationary excitation process can be modelled as stationary white or colored noise modulated by a deterministic time function. In this case a completely algebraic method is available for the computation of the time-varying covariance matrix. The method is suitable also for high-order systems. Examples demonstrate the efficiency of the method for the investigation of structures under earthquake excitation.

Subject Headings: Vibration | Earthquakes | Dynamic structural analysis | Vehicles | Structural dynamics | Structural analysis | Excitation (physics)

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