抄録
We have developed a snow accretion model for an overhead electric wire applicable to calm wind condition, taking dynamic effect of an electric wire rotation into account to simulate the instability due to top-heavy condition created by snow accumulation on the upper side of electric wire. The non-linear equation of the dynamic torsional deformation of electric wire is spatially discretized by finite element and temporally by the Crank-Nicolson method, and the numerical solution is obtained with a kind of the Newton-Raphson iterative technique. The simulation code, SNOVAL-dyn, is applied to a real power line in Toyama Prefecture and the quantitative comparisons between the numerical and observational results have been made to show the degree of applicability of SNOVAL-dyn.
