Instability During the Dynamic Collapse of Shells
A. V. Babkin, A. S. Novoseltsev, S. V. Ladov
Bauman Moscow State Technical University, Moscow, Russia
Keywords: cumulation, shaped charge, liner, collapse, jet flow, dynamic deformation, surface perturbations, instability
Abstract
This paper presents the results of a study of hydrodynamic instability during the collapse of shells, in particular, shaped charge liners. Initially, this instability was initiated by harmonic surface perturbations or perturbations of the load parameters. The instability manifested itself in the form of the development of these perturbations over time. The absence or limited growth of surface perturbations was considered as a manifestation of the stability of the liner deformation process. In this study, we take into account the results of both numerical simulation and available experimental data. Based on the results of the study, conclusions are formulated about the causes and possible forms of manifestation of instability during the deformation of collapsing metal liners, the governing parameters of this process, and its features and mechanism.
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