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Two mathematical models for describing the effective stiffness and the equivalent viscous damping ratio of wire rope springs, as amplitude dependent, were developed. Twenty-four springs were tested in free vibration and the displacement decays were recorded. The free vibration time history was used to calculate the effective stiffness and the equivalent viscous damping ratio. For each displacement...
A weighted-average technique to calculate the response of a structure equipped with a wire rope spring tuned mass damper, TMD, is presented. The probability distribution of structure-TMD relative displacement envelope is assumed to be of the Rayleigh-type and is used as a weighting function in averaging the amplitude-dependent response. The method is verified by comparing the calculated response with...
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