基于药料膨胀和流动均匀性的单孔药模具设计
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摘要
为分析模具结构参数对发射药成型尺寸及出口速度均匀性的影响规律,基于正交优化方法,采用POLYFLOW软件对单孔硝基胍发射药的挤出成型过程进行了模拟仿真。分析了入口线速度恒定条件下模具结构参数对发射药成型尺寸及出口速度均匀性影响程度的主次关系,在此基础上优化了单孔发射药挤出模具结构。研究结果显示:对药料成型膨胀影响最大的因素为模具收缩角,其次为成型段长度,再次为压缩段长度;对出口速度分布均匀性影响最大的因素为模具收缩角,其次为压缩段长度,再次为成型段长度。基于最小膨胀率和最小出口速度极差对模具结构参数进行了优化,结果表明,优化后的药料出口速度均匀性得到提高。
In order to analyze the effects of die structure parameters on the propellant molding size and the uniformity of velocity,the extrusion process of single-hole propellant was simulated by POLYFLOW based on orthogonal optimization method.By setting the inlet velocity as constant,the primary and secondary factors affected by die structure parameters were distinguished.On this basis,the die structure of one-hole propellant was optimized.The result shows that the mold shrinkage angle is the biggest effect factor on the expansion rate,secondly the length of forming section,thirdly the length of compression section.The mold shrinkage angle is the biggest effect factor on the uniformity of velocity,secondly the length of compression section,thirdly the length of forming section.Based on the minimum of expansion rate and velocity range,the die structure parameters were optimized.The optimized uniformity of velocity improves.
In order to analyze the effects of die structure parameters on the propellant molding size and the uniformity of velocity,the extrusion process of single-hole propellant was simulated by POLYFLOW based on orthogonal optimization method.By setting the inlet velocity as constant,the primary and secondary factors affected by die structure parameters were distinguished.On this basis,the die structure of one-hole propellant was optimized.The result shows that the mold shrinkage angle is the biggest effect factor on the expansion rate,secondly the length of forming section,thirdly the length of compression section.The mold shrinkage angle is the biggest effect factor on the uniformity of velocity,secondly the length of compression section,thirdly the length of forming section.Based on the minimum of expansion rate and velocity range,the die structure parameters were optimized.The optimized uniformity of velocity improves.
引文
[1]JEENU R,PINUMALLA K,DEEPAK D.Industrial adaptation of ultrasonic technique of propellant burning rate measurement using specimens[J].Journal of Propulsion and Power,2013,29(1):216-226.
[2]RESHMI S,VIJAYALAKSHMI K P,THOMAS D,et al.Polybutadiene crosslinked by 1,3-dipolar cycloaddition:pyrolysis mechanism,DFT studies and propellant burning rate characteristics[J].Combustion and Flame,2016,167(4):380-391.
[3]王燕,芮筱亭,宋振东,等.初始堆积对发射药床底部挤压应力的影响[J].爆炸与冲击,2014,34(5):560-566.WANG Yan,RUI Xiao-ting,SONG Zhen-dong,et al.Effect of original packing on compression stress at the bottom of propellant bed[J].Explosion and Shock Waves,2014,34(5):560-566.(in Chinese)
[4]焦旭英,杜江媛,张玉成,等.颗粒模压发射药装药的点传火性能[J].含能材料,2014,22(6):845-847.JIAO Xu-ying,DU Jiang-yuan,ZHANG Yu-cheng,et al.Ignition performance of grain-molded gun propellant charge[J].Chinese Journal of Energetic Materials,2014,22(6):845-847.(in Chinese)
[5]张远波,轩春雷,刘波,等.NC基高能低敏感发射药的低温抗冲击强度[J].火炸药学报,2015,38(1):78-81.ZHANG Yuan-bo,XUAN Chun-lei,LIU Bo,et al.Low temperature impact strength of nitrocellulose based high energy-low vulnerability gun propellant[J].Chinese Journal of Explosives&Propellants,2015,38(1):78-81.(in Chinese)
[6]王锋,李梓超,刘国涛,等.多孔环切杆状发射药的燃烧性能[J].火炸药学报,2015,38(2):89-92.WANG Feng,LI Zi-chao,LIU Guo-tao,et al.Combustion performances of multi-perforated curve-cut stick gun propellants[J].Chinese Journal of Explosives&Propellants,2015,38(2):89-92.(in Chinese)
[7]张丹丹,何卫东.硝基胍七孔发射药挤压成型过程的数值模拟[J].火炸药学报,2014,36(6):82-86.ZHANG Dan-dan,HE Wei-dong.Numerical simulation of 7-hole nitroguanidine-base gun propellant in extrusion forming process[J].Chinese Journal of Explosives&Propellants,2014,36(6):82-86.(in Chinese)
[8]肖正刚,应三九,徐复铭,等.粘结压实药柱变容燃烧中止实验研究[J].弹道学报,2014,26(1):1-6.XIAO Zheng-gang,YING San-jiu;XU Fu-ming,et al.Experimental studies on interrupted burning of consolidated propellant charges in semi-closed chamber with variable volume[J].Journal of Ballistics,2014,26(1):1-6.(in Chinese)
[9]肖正刚,应三九,徐复铭,等.粘结压实药柱解体及渐增性燃烧性能的中止实验研究[J].弹道学报,2013,25(3):70-74.XIAO Zheng-gang,YING San-jiu;XU Fu-ming,et al.Experimental studies of interrupted burning characteristics and deconsolidation performance of consolidated propellant charge[J].Journal of Ballistics,2013,25(3):70-74.(in Chinese)
[10]MU Yue,ZHAO Guo-qun.Numerical study of non-isothermal polymer extrusion flow with a differential viscoelastic model[J].Polymer Engineering and Science,2008,48(2):316-328.
[11]赵军.一种新型发射药燃烧性能测试和内弹道数值计算方法研究[D].南京:南京理工大学,2010.ZHAO Jun.Research on the combustion performance and simulation method on interior ballistics of propellant charge[D].Nanjing:Nanjing University of Science and Technology,2010.(in Chinese)
[12]叶慈南,曹伟丽.应用数理统计[M].北京:机械工业出版社,2004.YE Ci-nan,CAO Wei-li.Mathematical statistics[M].Beijing:China Machine Press,2004.(in Chinese)
[2]RESHMI S,VIJAYALAKSHMI K P,THOMAS D,et al.Polybutadiene crosslinked by 1,3-dipolar cycloaddition:pyrolysis mechanism,DFT studies and propellant burning rate characteristics[J].Combustion and Flame,2016,167(4):380-391.
[3]王燕,芮筱亭,宋振东,等.初始堆积对发射药床底部挤压应力的影响[J].爆炸与冲击,2014,34(5):560-566.WANG Yan,RUI Xiao-ting,SONG Zhen-dong,et al.Effect of original packing on compression stress at the bottom of propellant bed[J].Explosion and Shock Waves,2014,34(5):560-566.(in Chinese)
[4]焦旭英,杜江媛,张玉成,等.颗粒模压发射药装药的点传火性能[J].含能材料,2014,22(6):845-847.JIAO Xu-ying,DU Jiang-yuan,ZHANG Yu-cheng,et al.Ignition performance of grain-molded gun propellant charge[J].Chinese Journal of Energetic Materials,2014,22(6):845-847.(in Chinese)
[5]张远波,轩春雷,刘波,等.NC基高能低敏感发射药的低温抗冲击强度[J].火炸药学报,2015,38(1):78-81.ZHANG Yuan-bo,XUAN Chun-lei,LIU Bo,et al.Low temperature impact strength of nitrocellulose based high energy-low vulnerability gun propellant[J].Chinese Journal of Explosives&Propellants,2015,38(1):78-81.(in Chinese)
[6]王锋,李梓超,刘国涛,等.多孔环切杆状发射药的燃烧性能[J].火炸药学报,2015,38(2):89-92.WANG Feng,LI Zi-chao,LIU Guo-tao,et al.Combustion performances of multi-perforated curve-cut stick gun propellants[J].Chinese Journal of Explosives&Propellants,2015,38(2):89-92.(in Chinese)
[7]张丹丹,何卫东.硝基胍七孔发射药挤压成型过程的数值模拟[J].火炸药学报,2014,36(6):82-86.ZHANG Dan-dan,HE Wei-dong.Numerical simulation of 7-hole nitroguanidine-base gun propellant in extrusion forming process[J].Chinese Journal of Explosives&Propellants,2014,36(6):82-86.(in Chinese)
[8]肖正刚,应三九,徐复铭,等.粘结压实药柱变容燃烧中止实验研究[J].弹道学报,2014,26(1):1-6.XIAO Zheng-gang,YING San-jiu;XU Fu-ming,et al.Experimental studies on interrupted burning of consolidated propellant charges in semi-closed chamber with variable volume[J].Journal of Ballistics,2014,26(1):1-6.(in Chinese)
[9]肖正刚,应三九,徐复铭,等.粘结压实药柱解体及渐增性燃烧性能的中止实验研究[J].弹道学报,2013,25(3):70-74.XIAO Zheng-gang,YING San-jiu;XU Fu-ming,et al.Experimental studies of interrupted burning characteristics and deconsolidation performance of consolidated propellant charge[J].Journal of Ballistics,2013,25(3):70-74.(in Chinese)
[10]MU Yue,ZHAO Guo-qun.Numerical study of non-isothermal polymer extrusion flow with a differential viscoelastic model[J].Polymer Engineering and Science,2008,48(2):316-328.
[11]赵军.一种新型发射药燃烧性能测试和内弹道数值计算方法研究[D].南京:南京理工大学,2010.ZHAO Jun.Research on the combustion performance and simulation method on interior ballistics of propellant charge[D].Nanjing:Nanjing University of Science and Technology,2010.(in Chinese)
[12]叶慈南,曹伟丽.应用数理统计[M].北京:机械工业出版社,2004.YE Ci-nan,CAO Wei-li.Mathematical statistics[M].Beijing:China Machine Press,2004.(in Chinese)