The Lethality Assessment Method Of Air-Defense Missile Warhead

The lethality assessment method, as a key technology for the design of air-defense warhead, has been studied in the area both in China and abroad. Two methods are generally adopted to assess the lethality of warhead. One is the engineering-oriented method. Based on empirical formula, it can quickly provide lethality estimation for engineering applications, although it lacks in description of physical processes and mechanisms and its accuracy is not very satisfactory. The other one is the numerical simulation method. Based on hydrocode, it can provide relatively accurate results with related parameters in detail, but it consumes long computer time and requires relatively strong theoretical background and expertise on analysts. Thus, a method that combines accuracy with efficiency is needed to be developed.This dissertation focuses on two key topics of the air-defense missile warhead design--static lethality assessment and dynamic fuze-warhead match. It reviews traditionallethality assessment methods and approaches for fuze-warhead match studies, analyzes the factors which may effect fuze-warhead match by considering target-fuze-warhead as three elements of the system and develops a new model for lethality assessment. Based on above works and combined with the computer simulation technology, an assessment software for lethality and fuze-warhead match analysis is established which provides a new approach for advanced warhead design.The concept of warhead fragment field is introduced into warhead lethality assessment, and the model for describing the fragment field is developed based on shot-line method. Combined with the randomly tumbling model of fragments, the fragment field model can describes the flying controllability of fragments as a whole and the flying randomicity of a single fragment with adequate accuracy to enable the description of the state of fragments when impacting the target. Then, simulations for fragment fields of cylindrical charge, drum-shape charge, directional warhead and focused warhead are conducted.A target vulnerability model is established which includes target geometry model, reflection and diffraction of blast and failure criteria of target. A fuse startup model is introduced which includes wireless fuse model and a model for optimal explosion time.A stochastic endgame encounter of engagement model is used to apply the warhead blast model, the target lethality model and fuse startup model to calculating the effects of a warhead against the target. Thus, lethality of a warhead is assessed.The software SHOTLINE for assessing lethality of typical fragment warheads and efficiency of warhead-fuse match is developed with 3D visualized computer simulation technology. The software can calculate the lethality parameters such as velocity, mass, kinetic energy, dispersal distribution of warhead fragments under static/dynamic explosion and the results can be displayed visually. Two typical scenarios (against TBM and fighter) are analyzed to show its ability of assessing warhead-fuse match efficiency.The simulation results of lethality of warhead static explosion are compared with the...