Abstract:The bounding box is the external cuboid surrounding the components. Plane shot line scanning method is use on geometric description of aircraft for vuluerability assessment. The geometric description data include the presented area and the overlapping area of aircraft(components) and the components overlap. Narrowing the size of mesh can reduce the error, but the computer time of geometric description increased. Based on this fact, plane shot line scanning method based on the bounding box of components is proposed. Int the end, a numerical example is given. The result shows that the method is feasible and can guarantee the accuracy of the geometric description of aircraft, increase calculation efficiency.