直击雷情况下建筑物内部电磁环境评估方法探讨与实践

A Method for Assessing Electromagnetic Environment inside Buildings under Direct Lightning Strikes and Its Application

雷电电磁脉冲是当前造成雷电灾害的主要原因之一,雷电电磁环境评估对其防护有着重要的作用。目前现有的雷击电磁场仿真软件等存在硬件要求高、建模复杂、运算时间长等问题,难以广泛的运用于防雷管理部门日常业务中。为解决这一问题,文章拟讨论一种快速、有效的针对直击雷情况下雷电电磁环境评估的方法,并能应用于实践中。基于时域有限差分法(FDTD),建立了直击雷情况下建筑物雷电电磁环境评估的模型,并通过某地铁站工程实例的应用,给出了可靠的评估结果,证明了FDTD在建筑物电磁环境评估中应用的可行性。

Lightning electromagnetic pulse is one of main causes of lightning disasters,so the electromagnetic environment assessment is important for protection. Although there is plenty of commercial electromagnetic simulation software on market,most of them have strict system requirements on the computing environment and are time-consuming for users to build a reasonable model.Traditional commercial software is not suitable for daily lightning protection and evaluation services.For solving this problem,an efficient approach for electromagnetic environment assessment under direct lightning strikes is proposed based on the Finite-Difference Time-Domain（FDTD）method.Simple examples are also provided.It is of great significance to the further research in the field.