管状发射药冲击力学性能数值仿真
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摘要
采用ANSYS有限元软件在5 m/s、10 m/s、20 m/s的冲击速度下对单孔管状发射药的冲击力学性能进行了模拟仿真,表明冲击过程中最先在药柱的冲击边缘处出现应力集中,应力由点、线、面、体向药柱中进行传递。由于应力以波的形式在药柱中振荡传递,在药柱中部发生应力干涉现象,出现应力集中。整个冲击过程中应变主要集中在药柱的中部,宏观上表现药柱中部膨胀。在冲击作用下单孔管状发射药的断裂形式表现为接触式断裂。
The impact mechanical properties of single-hole tubular gun propellant were simulated by ANSYS finite element software at 5 m/s,10 m/s and 20 m/s impact velocities. It indicates that the stress concentration occurs at the impact edge of the drug column first during the impact process,and the stress is transmitted from the point,line,surface and body to the drug column. Since the stress is transmitted in the form of waves in the column,stress interference occurs in the middle,and stress concentration occurs.During the whole impact process,the strain is mainly concentrated in the middle of the drug column,and the macroscopically shows the middle of the drug column to expand. The fracture form of the single-hole tubular propellant under impact was characterized by contact fracture.
The impact mechanical properties of single-hole tubular gun propellant were simulated by ANSYS finite element software at 5 m/s,10 m/s and 20 m/s impact velocities. It indicates that the stress concentration occurs at the impact edge of the drug column first during the impact process,and the stress is transmitted from the point,line,surface and body to the drug column. Since the stress is transmitted in the form of waves in the column,stress interference occurs in the middle,and stress concentration occurs.During the whole impact process,the strain is mainly concentrated in the middle of the drug column,and the macroscopically shows the middle of the drug column to expand. The fracture form of the single-hole tubular propellant under impact was characterized by contact fracture.
引文
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[14]赵晓梅,闫光虎,严文荣,等. ANSYS在发射药力学性能仿真模拟中的应用[J].兵工自动化,2012,31(7):35-38.
[15]马帅,张相炎,游修东.基于ANSYS/LS-DYNA的弹带挤进过程仿真[J].机械制造与自动化,2014,43(5):92-94,98.
[2]饶立胜.高渐增性燃烧和高密度发射药研究[D].南京:南京理工大学,2007.
[3]黄金.发射药动态力学性能检测技术及评价方法研究[D].南京:南京理工大学,2012.
[4]涂善.改善新型高能发射药力学性能研究[D].南京:南京理工大学,2010.
[5]洪俊.伴随挤压破碎的发射药床散粒体系统动力学仿真研究[D].南京:南京理工大学,2007.
[6]陈涛.火炮发射装药发射安全性数值仿真与试验研究[D].南京:南京理工大学,2007.
[7]韩屹湛.多孔发射药力学特性实验研究与数值仿真[D].南京:南京理工大学,2016.
[8]芮筱亭,貟来峰,王浩,等.发射药床挤压破碎的试验模拟[J].兵工学报,2004,25(4):498-502.
[9]曹营军,杜仕国,韩其文.火药性能对膛压及初速的影响研究[J].火炸药学报,2002,25(1):10-11.
[10]凌剑,芮筱亭,贠来峰,等.膛内燃烧与力学环境物理仿真技术研究[J].南京理工大学学报(自然科学版),2006,30(4):512-516.
[11] JUNG G D,YOUN S K,KIM B K. A three-dimensional nonlinear viscoelastic constitutive model of solid propellant[J]. Journal of the Brazilian Society of Mechanical Sciences,2000,37(34):4715-4732.
[12] RADCHENKO A V,KRIVOSHEINA M N,KOBENKO S V. Numerical Simulation of Impact Loading on Solid Propellant Within an Orthotropic Shell[J]. Space Debris,2000,2(4):319-330.
[13] CHYUAN S W. Dynamic analysis of solid propellant grains subjected to ignition pressurization loading[J]. Journal of Sound and Vibration,2003,268(3):465-483.
[14]赵晓梅,闫光虎,严文荣,等. ANSYS在发射药力学性能仿真模拟中的应用[J].兵工自动化,2012,31(7):35-38.
[15]马帅,张相炎,游修东.基于ANSYS/LS-DYNA的弹带挤进过程仿真[J].机械制造与自动化,2014,43(5):92-94,98.