温度对B炸药力学性能与感度的影响

摘要

利用分子动力学软件Material Studio，研究了B炸药在不同温度下的力学性能与感度。根据B炸药的组成成分，建立了B炸药的晶胞模型。通过数值仿真，得到了B炸药在不同温度下的力学参数、最大键长分布、键连双原子作用能与内聚能密度。通过比较分析仿真结果，得到不同温度下B炸药力学参数与感度变化情况。结果表明：随着温度的升高，B炸药的力学参数逐渐减小，表明其力学性能逐渐减弱，最大键长分布逐渐增大，键连双原子作用能与内聚能密度逐渐减小，表明炸药的感度逐渐增大。%The mechanical properties and sensitivity of composition B at different temperatures were researched by using molecular dynamics software of Material Studio. The crystal model of composition B was established based on the component. The mechanical properties, maximum trigger bond length, interaction bond and cohesive energy density(CED) of composition B were got, as well as the changing tendency of mechanical parameters and sensitivity was obtained by comparing the simulation results. The results show that with the increasing of temperature, the mechanical parameters of composition B decrease, which indicate that the mechanical properties become worse, while the maximum trigger bond length increases, interaction energy and CED decrease, so the sensitivity of composition B increases.