摘要
为了更好地揭示弹带和身管的相互作用过程,建立了弹炮热力耦合有限元分析(FEA)模型,采用Fortran子程序结合显式有限元方法对挤进过程以及随后内弹道过程进行了数值模拟。计算结果和实验数据对比验证了热力耦合模型的准确性。仿真结果表明:采用经典内弹道模型时,次要功系数随时间变化并存在极值;在挤进过程中,弹带表层受热软化对内弹道过程有显著影响;对于药筒定装式炮弹,计及拔弹力可以提高挤进过程及随后内弹道过程的计算精度。
In order to study the dynamic interaction process of bearing band and barrel, a thermo-mechanical coupling finite element analysis （FEA） model is established. The engraving process of bearing band and interior ballistic process are simulated by the explicit finite element method with the use of Fortran subroutines. The FEA model is proved to be effective by comparing the calculated results with exper- imental results. The calculated results show that the coefficient of secondary work varies as a function of time, and an extremum value appears in the early time when using classical interior ballistic equation. The thermal softening of bearing band surface has a significant effect on the interior ballistic process dur- ing the band engraving. For fixed cartridge case, the computational accuracy of the engraving process and the interior ballistic process could be improved by taking account of extracting bullet force.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2015年第12期2254-2261,共8页
Acta Armamentarii
基金
江苏省自然科学基金项目(BK20140789)
中央高校基本科研业务费专项项目(30915118826)
关键词
兵器科学与技术
弹带挤进
热力耦合
拔弹力
有限元方法
ordnance science and technology
bearing band engraving
thermo-mechanical coupling
extracting bullet force
finite element method
