烟火药在定容条件下的爆燃p-t曲线仿真  

Simulation on p⁃t Curves of Deflagration of Pyrotechnical Compositions Under Constant Volume

作　　者：赵象润 严楠[1,2] 李朝振 闫利伟[1,2] 赵变玲 王德君 ZHAO Xiang⁃run;YAN Nan;LI Chao⁃zhen;YAN Li⁃wei;ZHAO Bian⁃ling;WANG De⁃jun(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;R&D Center,Liaoning North Huafeng Special Chemical Co.,Ltd.,Fushun 113003,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]辽宁北方华丰特种化工有限公司研发中心,辽宁抚顺113003

出　　处：《含能材料》2020年第6期533-538,共6页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(U1530135)。

摘　　要：通用的非线性显式动力学软件没有适用于模拟火工作动装置内烟火药作用过程的数学模型,导致动力学仿真只能采用多软件联合仿真。为简化仿真流程,采用MSC.Dytran软件新增的爆燃状态方程模拟烟火药在定容条件下的压力-时间历程(p-t曲线)。为验证仿真方法的适用性和准确性,进行了燃速较慢的炭黑/硝酸钾和燃速较快的铝/高氯酸钾两种烟火药的仿真和试验。对比分析了仿真结果与密闭爆发器试验结果在压力上升到半峰值(0.5pm)和到达压力全峰值(pm)两个时刻的时间差以及pm的相对误差。结果表明,炭黑/硝酸钾压力上升到0.5pm时,仿真结果和试验结果的时间差为0.03 ms,到达pm时的时间差为0.3 ms,pm的相对误差为7.4%~10%;与此相对应,铝/高氯酸钾在这两个压力点处的时间差分别为0.02 ms和0.1 ms,pm的相对误差在4%~6.3%。说明使用MSC.Dytran中的爆燃状态方程进行烟火药的p-t曲线仿真具有较好的准确性和适用性。Since the general nonlinear explicit dynamics software does not have a mathematical model suitable for simulating the action process of pyrotechnic actuated devices,the dynamics simulation can only be performed by multi‐software co‐simulation.In order to simplify the simulation process,the pressure‐time history(p‐t curves)of the pyrotechnic composition under constant volume conditions was simulated using the newly embedded deflagration equation of state of MSC.Dytran software.Simulation of slow‐burning carbon black/potassium nitrate and fast‐burning aluminum/potassium perchlorate were carried out and com‐pared with experimental results to verify the applicability and accuracy of the simulation method.The time differences when the pressure rises to half of the peak pressure(0.5pm)and reaches the peak pressure(pm),and the relative errors of pm were com‐pared and analyzed between the simulation results and the closed bomb test results.Results show that when the pressure of charcoal/potassium rises to 0.5pm,the time difference between the simulation result and the test result is 0.03 ms,the time difference when reaching pm is 0.3 ms,and the relative error of pm is 10%.Correspondingly,the time difference of aluminum/potassium perchlorate at these two conditions is 0.02ms and 0.1ms,and the relative error of pm is 4%.The p‐t curves simulation of pyrotechnic compositions using the deflagration equation of state in MSC.Dytran software has good accuracy and applicability.

关 键 词：爆燃状态方程 压力时间历程(p-t曲线) 炭黑/硝酸钾 铝/高氯酸钾 

分 类 号：TJ45[兵器科学与技术—火炮、自动武器与弹药工程]