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Information Journal Paper

Title

IDENTIFICATION OF THE MOST VULNERABLE AREA ON COMPLEX STRUCTURES FOR OPTIMIZING LIGHTNING PROTECTION SYSTEM

Writers

YAHYAABADI M. | SADOUGHI A.

Pages

 Start Page 369 | End Page 377

Abstract

 To calculate shielding failure of a LIGHTNING protection system, several analytical methods such as Electro-Geometric Model and Rolling Sphere Method have been proposed. These methods are used to determine protected and unprotected areas, but they can’t show the frequency of shielding failure to determine more risky areas. In this paper, a new numerical model is proposed by using LEADER PROGRESSION MODEL and ARTIFICIAL BEE COLONY ALGORITHM to identify the most vulnerable area on complex structures. The progression of LIGHTNING downward leader, the inception and propagation of UPWARD LEADERs are considered step by step until final jump. Structures, air terminals, downward and UPWARD LEADERs are modeled by different shapes of charges, and the electric field in an environment is computed by CHARGE SIMULATION METHOD. LIGHTNING is assumed as artificial bee, and areas with high shielding failure are the best food sources with high nectar amount. So the result produced by ABC algorithm is the most LIGHTNING risky area. Finally, LIGHTNING performance of an asymmetric structure protection system is evaluated, and based on simulation results the best position of air terminals is determined. The proposed method can be used for protection system design of any complex structure.

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