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摘要: 研究了刚性体与SPH(Smoothed Particle Hydrodynamics)方法相耦合的计算方法和技术,以此技术为核心,在原有三维综合拉氏程序CL3D的基础上,研制了适用于斜侵彻问题数值研究的刚性弹体与SPH靶体耦合计算的拉氏三维数值模拟程序CRSPH3D。针对金属材料编入了Johnson-Cook本构模型计算模块,针对混凝土材料编入了Johnson-Holmquist本构模型及与之配套的损伤模型和状态方程等的计算模块。用研制的计算程序对弹体分别正碰和斜碰穿透中厚铝靶和侵彻厚混凝土靶的过程进行了数值模拟计算和分析。结果表明,对于铝靶穿透问题,模拟计算得到的弹体剩余速度、弹体动能损失和贯穿图像与实验结果符合得较好。对于混凝土靶的侵彻问题也得到了与实验现象一致的、定性合理的图像。Abstract: The 3D computational method and technique were studied by coupling SPH algorithm to rigid body solution. Based on the new method and technique, and combining with the Johnson-Cook, Johnson-Holmquist contitutive models, as well as the existing 3D synthetical Lagrangian finite element code CL3D, a new 3D Lagrangian code CRSPH3D was written out. The new code, CRSPH3D, is suitable to be used in the numerical simulation of the 3D problems of rigid projectile penetrating thick targets. The new code was applied to numerically simulate the processes of both rigid projectiles normally and obliquely impacting and perforating aluminum targets and rigid projectiles normally and obliquely impacting and penetrating thick concrete targets. For the problems of projectiles perferating aluminum targets, the simulation results gave good agreement to the experimental ones. And for the problems of projectiles penetrating concrete targets, the obtained results from simulations were qualitatively reasonable.
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Zhang S C. Smoothed Particle Hydrodynamics(SPH) Method(A Review) [J]. Chinese Journal of Computational Physics, 1996, 13(4): 385-397. (in Chinese) 张锁春. 光滑质点流体动力学(SPH)方法(综述) [J]. 计算物理, 1996, 13(4): 385-397. Swegle J W, Hicks D L, Attaway S W. Smoothed Particle Hydrodynamics Stability Analysis [J]. J Comput Phys, 1995, 116(1): 123-134. Balsala D S. von Neumann Analysis of Smoothed Particle Hydrodynamics-Suggestions for Optimal Algorithms [J]. J Comput Phys, 1995, 121(2): 357-372. Johnson G R, Petersen E H, Stryk R A. Incorporation of an SPH Option into the EPIC Code for a Wide Range of High Velocity Impact Computations [J]. Int J Impact Eng, 1993, 14(4): 385-394. Dong S S, Wang B R. Incorporation of an SPH Option into the 3-D Finite Element Code for Dynamic Material Responses [J]. Explosion and Shock Waves, 1999, 19(suppl): 188-192. (in Chinese) 董师舜, 王邦荣. 三维耦合光滑粒子动力学方法 [J]. 爆炸与冲击, 1999, 19(增刊): 188-192. Song S C, Cai H N. SPH Algorithm for Projectile Penetrating into Concrete [J]. Explosion and Shock Waves, 2003, 23(1): 56-60. (in Chinese) 宋顺成, 才鸿年. 弹丸侵彻混凝土的SPH算法 [J]. 爆炸与冲击, 2003, 23(1): 56-60. Monaghan J J. Simulating Free Surface Flows with SPH [J]. J Comput Phys, 1994, 110(2): 399-406. Holmquist T J, Johnson G R, Cook W H. A Computational Constitutive Model for Concrete Subjected to Large Strains, High Strain Rates and High Pressure [A]//Michael J M, Joseph E B. 14th International Symposium on Ballistics [C]. Quebec, Canada, 1993: 591-600. Johnson G R, Cook W H. Fracture Characteristics of Three Metals Subjected to Various Strains, Strain Rates, Temperatures and Pressures [J]. Engineering Fracture Mechanics, 1985, 21(1): 31-48. Piekutowski A J, Forrestal M J, Poormon K L, et al. Perforation of Aluminum Plates with Ogive-Nose Steel Rods at Normal and Oblique Impacts [J]. Int J Impact Eng, 1996, 18(7-8): 877-887. Chen X W, Zhang F J, Yang S Q, et al. Mechanics of Structural Design of EPW(Ⅲ): Investigations on the Reduced-Scale Tests [J]. Explosion and Shock Waves, 2006, 26(2): 105-114. (in Chinese) 陈小伟, 张方举, 杨世全, 等. 动能深侵彻弹的力学设计(Ⅲ): 缩比实验分析 [J]. 爆炸与冲击, 2006, 26(2): 105-114.
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