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Shock and Vibration
Volume 2015, Article ID 890474, 6 pages
Research Article

Determination of the Strain-Free Configuration of Multispan Cable

1State Key Lab for Mechanical Structural Strength and Vibration, Xi’an Jiaotong University, Xi’an, Shannxi 710049, China
2Shanghai Electric Power Generation Equipment Co., Ltd. Shanghai Turbine Plant, Shanghai 200240, China

Received 16 March 2015; Revised 25 May 2015; Accepted 26 May 2015

Academic Editor: Tai Thai

Copyright © 2015 Chuancai Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


For building a reasonable finite element geometric model, a method is proposed to determine the strain-free configuration of the multispan cable. The geometric conditions (the end conditions and the unstretched length conditions) as constraints for the configuration of multispan cable are given. Additionally, asymptotic static equilibrium conditions are given for determining the asymptotic shape of the multispan cable. By solving these constraint equations, a set of parameters are determined and then the strain-free configuration of multispan cable is determined. The method reported in this paper provides a technique for building reasonable FEA geometric model of multispan cables. Finally, a three-span cable is taken as example to illustrate the effectiveness of the method, and the computed results are validated via the software ADINA.