Quantitative Calculation Methods Of Aircraft Non-nuclear Vulnerability

Quantitatively calculating the aircraft vulnerability consists of six research areas, which are constructing the model for vulnerability calculation, target geometric description, single hit vulnerability calculation by one nonexplosive penetrator, multiple hit vulnerability calculation by nonexplosive penetrators, vulnerability calculation at missile spray fragments, and blast wave vulnerability calculation. In this dissertation, the last five research areas mentioned above are investigated thoroughly, and some new methods and improvements are proposed to solve the unsolved problems. As a consequence, a completely quantitative aircraft vulnerability calculation process, which is characterized mainly by 'plane and curved face shot line scanning methods', 'considering the ricochet', 'vulnerable area decomposition method in the overlapping region', 'filling boxes with balls', 'improved aircraft equivalent singly vulnerable area calculation methods', 'aircraft unique existent state based Markov-Chain and Tree-Diagram methods considering component overlap', 'numerical simulation method for solving the combinatorial explosion problem' and 'circle scanning method for constructing the blast wave vulnerability envelope', et.al, is formed. The software package of computer program is also developed.The dissertation is divided into eight chapters, in which chapters 2 to 7 are the main parts.In Chapter 2, 'plane shot line scanning method' for aircraft geometric description is proposed based on the finite element model and on the commonly used assumption that the penetrators travel along parallel shotlines.Compared with the currently used geometric description methods, the proposed method has the following advantages. (1) The threat ricochet is considered, which makes the following vulnerability calculation more conform to reality. (2) It combines the partial functions of FASTGEN (the Fast Shotline Generation program) and COVART (the Computation of Vulnerable Area and Repair Time program) into a whole, and thus the geometric description data are simpler than that provided by FASTGEN and easy to be used by analysts. (3) It is very general and can deal with the situation where the components overlap in an arbitrary manner at any threat aspect.