No abstract

A method for cylindrical explosion-containment vessels was presented, which used symmetrical implosion loading cooperating with the vessels to control the out-explosion loading, increasing the anti-explosion ability of explosion-containment vessels. In this study, theoretical analysis was developed first and response of cylindrical vessels loaded with implosion and out-explosion was discussed. Approximate expressions for final circumferential strain were obtained. Comparison between the theoretical calculations and the numerical simulations showed that the proposed method could effectively reduce the plastic strain of cylindrical explosion-containment vessels. The theoretical analysis introduced in this study can provide reference for related research. In addition, problems such as spall and defense of shock wave need to be solved before the presented method could be carried out in practical application.

With centrally loaded charges, the deformation of the cylindrical vessel is concentrated in the range of L/R = ±2 by the blast center. The reactive reinforcement method, which uses dispersive charges cooperating with vessels to control the concentrated charge, is presented in this study. The experimental research on this reactive reinforcement method is tested experimentally. Global and flakelike charges are selected as the inner and outer charges, respectively. This method primarily focuses on synchronizations, especially the detonation synchronization of such inner and outer charges. A detonation system is designed, and central and multipoint detonation techniques are used to control the synchronization. Three experiments are performed, of which two are advanced studies. The third is an experimental research on the method. Results show that the max time difference of the detonation system is 1 μs, suggesting good synchronization performance. The strain of the vessel is reduced by about 71.4% using the reinforcement method. This study provides a reference for the reinforcement method in practical applications.

Cylindrical explosive loading has an important application in explosive working, researching on weapon damage, and explosivedriving load. This study uses experimental and numerical methods to study the response of long and thin tubes when subjected to cylindrical explosive loading. The flake-like charge and multipoint initiation technique were adopted to load cylindrical explosive waves. Experimental results showed that the method could produce uniform deformation in certain parts of the long tube, but partial spall injuries occurred after the explosion. The macroscopic and microscopic deformation of tubes were analyzed. Numerical simulations were conducted to investigate the detailed response of the tube subjected to a cylindrical explosive wave. The results indicate that the collision of explosive waves brought inconsistencies in pressure and velocity. The pressure and velocity in the collision region were significantly higher than those of other parts, which caused the collision region to be easily damaged.