Extended Damping Models for Vibration Data Analysis

A simple 3 degree of freedom spring-mass-damper systems has been used to investigate the response of structural systems when the damping mechanisms are more general than viscous or hysteretic damping. A formulation of the modal series expression for the mobilities for such generally damped structure...

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Bibliographic Details
Main Author: Fabunmi,J. A
Format: Report
Language:English
Subjects:
Component Reports
Damping
Degrees of freedom
Equations of motion
Mathematical models
Mobility
Modal analysis
Simulation
Structural mechanics
Structural response
Vibration
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Summary:A simple 3 degree of freedom spring-mass-damper systems has been used to investigate the response of structural systems when the damping mechanisms are more general than viscous or hysteretic damping. A formulation of the modal series expression for the mobilities for such generally damped structures was also presented. This formulation allows the modelling of general damping behavior by means of a frequency dependent function, the form of which is indicative of the velocity power laws prevailing in the damping mechanism. A numerical simulation of mobility testing of this simple structural model revealed trends in the mobility functions which are similar to those reported in the testing practice of damped complicated structures such as helicopters and the like. This article is from 'Proceedings of the International Conference on Recent Advances in Structural Dynamics (2nd) held at the University of Southampton (England) on 9-13 April 1984. Volume 2,' AD-A143 301, p521-533.