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Mathematical Problems in Engineering
Volume 2015, Article ID 723463, 13 pages
Research Article

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

College of Science, National University of Defense Technology, Changsha, Hunan 410073, China

Received 30 August 2014; Accepted 8 December 2014

Academic Editor: Yi-Chung Hu

Copyright © 2015 Wenkai Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


By analyzing the fragmentation distributions of a cylindrical structure and a specific structure, the necessity of parallel control to the fragments is presented. The shell shape of structures has an influence on the fragment spatial distribution. A new design method for the shell shape is proposed. To facilitate the establishment of the numerical model and the machining for relative experiments, the mathematical description of the theoretical calculated generatrix of the shell is simplified. The fragment spraying processes of the designed structures are simulated, and end effects are analyzed. Based on the theoretical design and plentiful simulation data, the relationships between the size of the parallel fragmentation structure and the optimized curvature radius of the shell are expressed by an equation. The equation is validated by numerical means and can be a reliable reference to the design of the parallel fragmentation structure.