Unified Finite Difference Formulation for Free Vibration of Cables
Publication: Journal of Structural Engineering
Volume 124, Issue 11
Abstract
In this paper, a finite difference formulation for vibration analysis of structural cables is introduced. This formulation incorporates into a unified solution the effects of the bending stiffness of cable and its sag-extensibility characteristics and provides a tool for accurate determination of vibration mode shapes and frequencies. Various cable-end conditions, variable cross sections, and intermediate springs and/or dampers are taken into account. Using a nondimensional form of this formulation, a parametric study was conducted on the effects of sag-extensibility and bending stiffness. The formulation is verified with available theoretical solutions and compared with finite-element analyses. Capabilities of this formulation are demonstrated through examples. A simple relationship among nondimensional cable parameters is also introduced for the range of parameters applicable to stay cables in cable-stayed bridges. This simple relationship provides an accurate tool for measurement of tension forces in stay cables using the vibration method.
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Copyright © 1998 American Society of Civil Engineers.
History
Published online: Nov 1, 1998
Published in print: Nov 1998
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