Accession Number : ADP001672

Title :   Numerical Simulation of Ice Accretion on Cables,


Personal Author(s) : McComber,Pierre

Report Date : JUN 1983

Pagination or Media Count : 8

Abstract : Samples of ice accretions collected on cables of overhead transmission lines have shown evidence of twisting of the cable during icing. A method is presented to simulate numerically in two dimensions the accretion on a cable of a known torsional rigidity. The surface is approximated by one dimensional isoparametric quadratic elements. For each time step, the change in shape is calculated at each node from the droplet velocities; the surface is then interpolated to find the ice weight by integration; the equilibrium angle of rotation is found and finally the rotation of the shape is done numerically. Results of a numerical simulation for different torsional rigidities is presented. A larger rigidity makes the accretion shape more elliptical whereas it becomes more circular for a smaller rigidity. Results also indicate that twisting of the cable has a significant effect on the accretion shape obtained but has almost no influence on the accretion rate. (Author)

Descriptors :   *Ice, *Ice formation, *Cables, *Transmission lines, *Cold weather tests, Numerical methods and procedures, Mathematical prediction, Atmospherics, Meteorological data, Water, Drops, Velocity, Angles, Rotation, Environmental tests, Simulation, Models, Torsion, Workshops

Distribution Statement : APPROVED FOR PUBLIC RELEASE