The Analysis Of Transmission Tower-line System Under Icing Load And Sub-disaster Research

In recent years, frequent occurrence of disasters, ice and snow, so that transmission lines have been devastated. Particularly severe in southern China in 2008 large-scale snow and ice disaster, has led to a serious break down tower accidents, to the national grid and the national economy caused by huge losses.Therefore, the structure of transmission tower disaster mitigation research has important practical significance. This Article based on a damage-reduction proposed power transmission tower - line architecture, the sub-ice disaster resistant design concept, this design concept can satisfy the power transmission tower - line of the normal use of the architecture requirements, but also in the event of serious snow disasters, the maximum degree of protection for the structure of the main transmission tower damage does not occur, reduce disaster losses,and easy-to post-disaster reconstruction.Based on a linear transmission tower-line system, the establishment of the finite element model, numerical simulation of the transmission lead (ground) line Icing growth process were discussed at different times icing loads on the power transmission tower - wire system, the impact of lead follow-up analysis of ice growth until the tower-line system damage law; right Icing power transmission tower-broken line system model for transient response time-history analysis to study the impact of the break load of the power transmission tower-the impact of cable system; Finally, based on numerical simulation results and in the field of earthquake disaster Guangfa application thinking of the sub-transmission tower structure design of damage-reduction measures, by setting the sub-branch components and control the damage of the disaster preparedness component load to take the initiative to uninstall, can reduce the power transmission tower extent of damage, minimize disaster losses, and because sub-disaster damage to uninstall components can improve the power transmission tower structure and the ultimate strength to withstand snow time, to the relief work has won precious time, with great economic benefit.