关键词: 聚能射流, 虚拟原点, 量纲分析, 动态试验, 有限元模拟

Abstract: In order to study the variation law of the penetration power of the shaped charge jet under lateral disturbance, finite element models of the dynamic penetration of the shaped charge jet were established, and the evolution process of the jet penetration process from static to dynamic conditions was analyzed. Based on the virtual origin theory and dimensional analysis method, a virtual source is introduced to characterize the jet in the dimensional analysis model. an engineering prediction model for dynamic jet penetration depth considering lateral disturbance, jet and target plate strength was established. We designed and conducted a jet dynamic penetration test based on a rocket sled, and validated the numerical simulation and prediction models. The research results indicate that the dynamic penetration depth of the jet decreases exponentially with the increase of lateral disturbance of the target plates; The numerical simulations, prediction model, and experimental results are in good agreement, and both the prediction model and numerical simulation have a certain degree of accuracy and effectiveness. The established prediction model can describe the influence of lateral disturbance on the penetration power of shaped charge jet, and provide a basis and reference for evaluating the dynamic damage power of formed charges.

Key words: shaped charge, virtual origin, dimensional analysis, dynamic test, finite element simulation