Stochastic Response of a Caster-Mounted System

by Michael A. Moser, IBM Corp, San Jose, United States,
Wilfred D. Iwan, IBM Corp, San Jose, United States,

Document Type: Proceeding Paper

Part of: Engineering Mechanics


The response statistics of a caster-mounted system with white noise excitation are estimated using the generalized equivalent linearization method. The displacement and velocity covariances are characterized by two limiting responses: from below by that of a block restrained by Coulomb friction, and from above by a frictionless system. The transient behavior is shown to initially be that of the Coulomb friction system, but the increasing displacement covariance results in the behavior switching to that of a frictionless system, leading to non-stationary response in both velocity and displacement.

Subject Headings: Stochastic processes | Friction | Displacement (mechanics) | Health care facilities | Equipment and machinery | Excitation (physics) | Linear functions | Stationary processes

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