Development And Validation Of A Numerical Model For Vibration Of Power Lines

Modal testing is being investigated as a means of non-destructive evaluation of wooden utility pole strength. In order to understand the effects of conductors on the dynamics of the poles, a numerically efficient model based on lumped segments for the conductor has been developed and experimentally validated. The cable is modeled as number of lumped segments jointed with axial and torsional springs and dampers representing the cable’s compliance and damping. In order to validate the models, an experimental set up for vibration testing of the cable has been built. Time response measurement and modal testing are performed and the comparison of the experimental results with the numerical results show that the lumped segment model has the fidelity to capture the dynamics of the cables efficiently and accurately.