抗战斗部侵彻爆炸作用的混凝土遮弹层设计  

Design of concrete shield against the combination of penetration and explosion of warheads

作　　者：程月华 周飞 吴昊 CHENG Yuehua;ZHOU Fei;WU Hao(College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《爆炸与冲击》2023年第4期110-127,共18页Explosion and Shock Waves

基　　金：国家自然科学基金(52208500)。

摘　　要：准确评估战斗部侵彻爆炸作用下混凝土遮弹层的损伤破坏可为防护工程设计提供重要参考。首先基于Karagozian&Case(K&C)模型框架建立了新型混凝土动态损伤本构模型,其中强度面综合考虑了静水压力、Lode角、应变率和损伤;独立描述了拉伸和压缩损伤,并考虑了拉压之间的连续过渡以及剪切变形和体积压缩对损伤的贡献。随后,开展了半无限厚混凝土靶体的105 mm口径弹体侵彻爆炸联合作用试验。进一步通过对上述试验和已有有限厚混凝土靶板的预制孔埋置装药爆炸试验进行数值仿真分析,验证了所建立的本构模型、参数取值和有限元分析方法在描述混凝土动态阻力、损伤演化和开裂行为方面的准确性。最后,确定了SDB、WDB-43/B和BLU-109/B三种典型战斗部以声速侵彻爆炸普通混凝土的临界贯穿和临界震塌厚度。结果表明:SDB、WDB-43/B和BLU-109/B战斗部侵彻爆炸作用下混凝土的临界贯穿厚度分别为1.4、3.4和3.8 m,临界震塌厚度分别为3.6、6.3和8.3 m;由于携带炸药量的差异,不同战斗部侵彻爆炸下的临界贯穿和临界震塌厚度与侵彻深度的比值非定值,相应的比值范围分别为1.49~2.13和2.90~4.66。Accurately evaluating the damage and failure of concrete shield subjected to combination of penetration and explosion of warheads can provide an important reference for the design of protective structures.Firstly,based on the frame of Karagozian&Case(K&C)model,a newly dynamic-damage constitutive model was established.The hydrostatic pressure,Lode angle,strain rate,and damage were all considered in strength surface.The tension and compression damages were described separately with a continued transition.Besides,the contribution of shear deformation and hydrostatic compression were also considered.Then,the combined penetration and explosion test of 105-mm-caliber projectile on the semi-infinite concrete target was conducted.The corresponding numerical simulation was conducted to verify the accuracy of the constitutive model,the parameters,and the finite element analysis approach in describing the dynamic resistance of concrete.Furthermore,by conducting the numerical simulations of the existing prefabricated hole charge explosion test on the finite concrete plane,the accuracy of the established constitutive model,parameters,and finite element analysis approach in describing the damage evolution and cracking behavior of concrete was validated.Finally,the perforation limit and scabbing limit of normal strength concrete subjected to the combination of penetration and explosion of three typical warheads at sound velocity were determined.The results show that,the perforation limits of the SDB,WDU-43/B,and BLU-109/B warheads are 1.4,3.4 and 3.8 m,respectively.The scabbing limit are 3.6,6.3 and 8.3 m,respectively.Due to the differences of the explosive mass in warheads,the ratios of perforation limit and scabbing limit under combined penetration and explosion to the depth of penetration are not constant.The corresponding ratio ranges are 1.49−2.13 and 2.90−4.66,respectively.

关 键 词：混凝土遮弹层 侵彻爆炸作用 临界贯穿厚度 临界震塌厚度 防护设计 

分 类 号：O385[理学—流体力学]