高压物理学报2026，Vol.40Issue(5)：75-83,9.DOI:10.11858/gywlxb.20251181
DNAN基含预制裂纹炸药装药点火后反应演化特性
Reaction Evolution Characteristics of Ignited DNAN-Based Explosive Charges with Pre-cracks
姚昕 1王辉 1沈飞 1屈可朋1
作者信息
- 1. 西安近代化学研究所,陕西 西安 710065
- 折叠
摘要
Abstract
To investigate the influence of cracks and gaps on the reaction evolution characteristics of aluminum-containing DNAN-based explosives after the formation of mechanical induced hotspots,explosive charge samples with different initial cracks were fabricated.An explosive impact ignition device based on gun propellant combustion loading was designed.The evolution process following the ignition of explosives was simulated.Pressure changes and post-test morphological features of the explosives were recorded.Numerical simulations were conducted to analyze the stress field and reaction distribution of explosive charges with different initial cracks under the same loading conditions.The results indicate that the crack-free and single-line crack explosive charge with no gap debris remained intact,and pressure dropped rapidly after the peak with no reaction occurred,and the hot spot region was located at the bottom.While for the single-line crack explosive charge with 1 mm gap,the explosive charge fractured and exhibited local low-order reactions,with a slow pressure decay process.Among these,the hot spot region of the single-line crack explosive shifted to the side surface,while the cross-line crack explosive formed dual hot spot regions on both the side surface and bottom,further enhancing the reaction intensity.This demonstrates that pre-cracks significantly influence the explosive reaction process by altering stress distribution and expanding hot spot regions.关键词
DNAN基含铝炸药/预制裂纹/发射药/反应传播/响应特性Key words
DNAN-based Al-containing explosive/pre-cracks/gun propellant/reaction propagation/response characteristics分类
数理科学引用本文复制引用
姚昕,王辉,沈飞,屈可朋..DNAN基含预制裂纹炸药装药点火后反应演化特性[J].高压物理学报,2026,40(5):75-83,9.
