How to calculate the collection area of non-isolated structure a new method: Volume-Proportion Method (VPM)

The calculation of collection area is an important procedure to assess the lightning risk of a structure. There are two kinds of structure: isolated one and non-isolated one. What's the difference between them? How to calculate the collection area of a non-isolated structure? This article describes that and proposes a new method: Volume-Proportion Method (VPM). As a quantitative method from a three-dimensional viewpoint, VPM is the best method to calculate the collection area of non-isolated structures in the world as we know. At last several scenarios are shown to showcase the advantage of VPM.