THE IMPACT OF THE HETEROGENEITY OF THE CHANNEL OF LIGHNING IN THE MODEL OF ITS ELECTROMECHANICAL ACTION WITH THE STROKE INTO THE SKIN OF THE AIR VESSEL
An influence of heterogeneity in the post of electrical discharge on the electromechanical processes, that are developing in the zone of the tying of heavy current electrical discharge to the conducting plate (e.g., during the lightning stroke into the hull of air vessel) is examined. A further development of the mathematical model of ponderomotive pressure on the plate in the discharge tying zone is obtained. Now it takes into account the heterogeneity of current density in the channel of discharge, caused by pinch effect and nonuniformity of the temperature distribution over a section of the channel. It is shown that the correction to the integral force of electromechanical action on the plate throughout the entire area of the discharge tying spot, caused by the heterogeneity of channel, scarcely exceeds 3%. It is substantially lower than the approximate values used for estimation of lightning fundamental characteristics.