Dynamic tree diagram method for calculating aircraft multiple-hit vulnerability

In the survivability/vulnerability assessment for aircraft, the kill probability and vulnerable area of aircraft at certain threat hits always require to be provided. Aiming at the continuous variation of the component overlapping regions of the aircraft with different shoot directions and attitudes at multiple hits, we proposed a dynamic tree diagram method for calculation for aircraft multiple-hit vulnerability under the condition that the aircraft has many non-redundant components, redundant components and many component overlapping regions. The universal computation program was established and the calculating aircraft multiple-hit vulnerability was carried out by the program through an actual example. The results show that the method is correct, general, readily achieved and effective in the storage of the tree's branches.