Numerical evaluation method of lightning rod protection probability北大核心CSCD

［Objectives］Aiming at the current situation in which it is difficult to efficiently evaluate protection probability through traditional lightning rod evaluation methods, an efficient numerical evaluation algorithm is developed on the basis of an electrogeometric model (EGM) and attractive volume to realize the efficient calculation of lightning protection probability at any point in space.［Methods］This method first determines the attractive volume boundary of the lightning rod and protection object according to the interception process of the upward and downward leaders. The collection surface and exposure arc of the lightning stroke distance are then calculated, enabling the attractive risk and interception effect of the lightning rod to be quantified. Finally, the attraction and interception characteristics of the lightning rod are integrated to establish a numerical evaluation model of protection probability. To verify the accuracy of this method, the general rule of lightning rod protection probability is analyzed and the results compared with the existing analysis method.［Result］The evaluation results of this method show good agreement with those of classical leader progression model (LPM) theory.［Conclusions］ The method proposed herein has a high degree of quantification and can realize the efficient calculation of lightning protection probability at any point in space, which can provide useful references for lightning protection design work. © 2023 Authors. All rights reserved.     

混凝土联锁块护岸软体排设计方案优化

针对引江济淮工程J002-1标段护岸软体排出现的预制块挤压破损、施工效率低下等问题，对原设计方案护岸软体排结构以及施工方法进行优化。通过参考工程实例以及方案比选，采用C25混凝土预制块联锁片软体排结构和铺排船施工的方法。结果表明，优化施工方案技术上可行，预制块破损少、施工效率高，达到预期效果。软体排结构优化和铺排船施工工法在引江济淮工程的成功应用，为类似工程提供良好示范，具有较好的推广应用价值。