发射过载条件下燃料应力状态的数值计算
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摘要
爆炸力学程序ObjectMMIC是首次应用面向对象的方法对爆炸力学计算模型进行分析。该程序提出和建立了面向对象的爆炸力学Euler型多物质方法的框架。本文利用此程序分析了燃料空气炸药(FAE)战斗部发射过载加速度为104g时,固液组分比为3∶2、6·5∶3·5和5∶53种情况下的应力和应力率变化规律。分析结果表明,在发射过程中,固液组分比例对燃料所受的应力和应力加载率有着较大的影响。其中,燃料所受的应力大小决定于固体组分的含量;而所受的应力加载率大小决定于固体和液体组分的含量。这些研究为优化FAE燃料配方,提高其物理稳定性和发射安全性提供了依据,试验与数值仿真结果的比较表明数值仿真方法是可用的。
The explosion mechanics programming ObjectMMIC is a Eulerian multi-material numerical method based on object-oriented. The stress and stress rate distributions of FAE fuel vs. time, when launching over-loading acceleration is 104?g, have been simulated by executing the programming object MMIC, whose solid- liquid ingredient ratios are 3∶2, 6.5∶3.5 and 5∶5, respectively. The analysis shows that the ratio of solid- liquid ingredients has a great influence on stress and stress rate. The stress depends only on the solid ingredient content of the fuel, while the stress rate depends on the solid and liquid ingredient contents. Studies in this domain have the potential for gaining information on optimizing FAE fuel, leading to the improvement of stability and launching safety. The comparison between experimental and simulative results shows that the numerical simulation method is feasible.
The explosion mechanics programming ObjectMMIC is a Eulerian multi-material numerical method based on object-oriented. The stress and stress rate distributions of FAE fuel vs. time, when launching over-loading acceleration is 104?g, have been simulated by executing the programming object MMIC, whose solid- liquid ingredient ratios are 3∶2, 6.5∶3.5 and 5∶5, respectively. The analysis shows that the ratio of solid- liquid ingredients has a great influence on stress and stress rate. The stress depends only on the solid ingredient content of the fuel, while the stress rate depends on the solid and liquid ingredient contents. Studies in this domain have the potential for gaining information on optimizing FAE fuel, leading to the improvement of stability and launching safety. The comparison between experimental and simulative results shows that the numerical simulation method is feasible.
引文
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[6]张奇,闫华,白春华.装药发射过载动力学研究[J].振动与冲击,2003,22(2):78-80.
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[2]许会林,汪家骅.燃料空气炸药[M].北京:国防工业出版社,1980:1-5.
[3]惠君明,刘荣海,葛桂兰.提高FAE威力的研究(Ⅰ)[J].南京理工大学学报,1995,19(5):472-476.
[4]浦加顺,白春华,梁慧敏,等.多元混合燃料分散爆轰研究[J].火炸药学报,1998,(1):1-5.
[5]张奇,闫华,白春华.固液混合燃料物理稳定性分析[J].火炸药学报,2003,26(4):47-50.
[6]张奇,闫华,白春华.装药发射过载动力学研究[J].振动与冲击,2003,22(2):78-80.
[7]北京工业学院八系爆炸及其作用编写组编.爆炸及其作用[M].北京:国防工业出版社,1979:323-325.
[8]王仲琦.面向对象的爆炸力学Euler型多物质数值方法及其应用研究[D].北京:北京理工大学,2000.
[9]Hol mquist TJ,Johnson G R,Cook WH.Acomputational con-stitute model for concrete subjected to large strain,high strain rates and high pressure[C].The14th Int.Sym.Ballistics,Quebee,Canada,1993:591-600.
[10]亨利奇.爆炸动力学及其应用[M].北京:科学出版社,1987:169.
[11]徐锡申.实用物态方程理论导引[M].北京:科学出版社,1986:405-408.
[12]Dymond J H,Si mth E B.The viral coefficients of pure gases and mixtures.A Critical Complication[M].Oxford:Clarendon Press,1980.
[13]Allahdadi F A,Medina D F,Olson E T,et al.Si mulation of i mpact detonation of AI M-120[R].AD-A379702,1988:4-8.
[14]韩小平,张元冲,沈亚鹏,等.COMP.B复合炸药动态力学性能和塑性流动本构关系的研究[J].力学学报,1996(5):319-326.
[15]贾乃文.粘塑性力学及工程应用[M].北京:地震出版社,2000:63-70.
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