荣凯;杨军;陈占扬;
RONG Kai;YANG Jun;CHEN Zhan-yang;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology;

• 1:北京理工大学爆炸科学与技术国家重点实验室

摘要(Abstract)：

为了研究土介质对爆炸冲击波的衰减作用,利用有限元软件ANSYS/LS-DYNA对含土介质密闭容器内炸药爆炸进行了数值模拟。采用SPH-FEM耦合算法建立不同厚度(15、18、21、24、27、30 cm)、不同距离(10、20、30、40、50、60 cm)工况下的计算模型,对比分析了容器内空气冲击波峰值压力、到达时间及土介质破坏过程等指标。结果表明:挡墙距爆源40 cm,厚度24 cm时,爆炸冲击波峰值压力平均衰减率为72.25%,平均衰减率增量为2.75%;挡墙厚度24 cm,距爆源10 cm时,空气准静态压力衰减率为44.44%。爆炸冲击波能量衰减量随着挡墙厚度的增大而增大,随爆源距的增大而减小。
In order to study the attenuation effect of soil on blast wave, the finite element software ANSYS/LS-DYNA was used to simulate the explosion in a closed vessel containing soil. The SPH-FEM coupling algorithm was used to establish the explosion model with different thicknesses(15, 18, 21, 24, 27 and 30 cm respectively) and at different distances(10, 20, 30, 40, 50 and 60 cm respectively), and the peak pressure, arrival time and damage process of soil were compared and analyzed. The results show that when the wall is 40 cm away from the blasting center and the thickness is 24 cm, the average attenuation rate of the peak pressure is 72.25 %, and the increment of average attenuation rate is 2.75 %; when the wall is 10 cm away from the blasting center and the thickness is 24 cm, the quasi-static air pressure attenuates by 44.44 %. The energy attenuation of blast wave increases with the thickness of wall and decreases with the distance away from the blasting center.

关键词(KeyWords)： 爆炸冲击波;数值模拟;土介质;密闭容器
blast wave;numerical simulation;soil;closed vessel

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51774043)

作者(Authors): 荣凯;杨军;陈占扬;
RONG Kai;YANG Jun;CHEN Zhan-yang;State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology;

DOI: 10.19931/j.EB.20200200

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