Dynamic Simulation Analysis of Bar Insulator Pollution in Strong Wind

Abstract

In order to probe into the pollution characters of the surface of an insulator used in high-speed railway, forces on polluted particles in a strong wind environment were analyzed, and a simulation model for pollution of QBJ-25/20 type bar insulator was established. By taking the pollution volume fraction of insulator shed as the index of pollution measure, the relationships between the volume fraction and wind velocity and wind coming angle were obtained. The research result shows that in a strong wind condition there is a negative exponential relationship between the volume fraction and the coming angle, and there exists the same rerelationship between the volume fraction and the wind velocity. The pollution on the upper surface of the shed is mainly influenced by the coming angle ranging from 0° to 90°, while the pollution on the lower surface of the shed is seriously affected by the wind velocity. With the increase of polluted particles' diameters, the volume fraction shows a trend of first increase and then decrease.