Analysis of Load Characteristics of Fuze during Penetrating a Multi-layer Target Based on the Matching Relation of Projectile and Target
To accurately analyze the load characteristics of fuze in the process of penetrating a multi-layer target,the characteristics of projectile-target forces under different working conditions of penetrating a multi-layer target are analyzed by cavity expansion theory and differential panel method.The propagation characteristics of projectile-target force in the projectile body and the frequency response characteristics of warhead-fuze system are analyzed based on the stress wave propagation equation.The two analyzed results show that the relationship between the fundamental frequency of projectile-target force determined by penetration speed and target spacing and the frequency response characteristics determined by the structure of warhead-fuze system determines the load characteristics of fuze.The finite element simulation and test results of warhead-fuze system further prove that the frequency response curve of fuze under the condition of high-speed penetration into multi-layer target is not fixedly concentrated at a certain frequency.When the natural frequency of a certain order of axial vibration of warhead-fuze system is close to the integral multiple of the fundamental frequency of projetile-target force,the frequency response curve of fuze load is obviously concentrated near the natural frequency of this order of axial vibration.The analysis of the influence of projectile-target parameters on the load characteristics of fuze in the process of penetrating a multi-layer target has important guiding significance for fuze initiation control algorithm and protection design.
penetrationfuzeparameters of projectile and targetfuze loadcharacteristics analysis
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