第二炮兵工程学院201室,西安,710025
网络首发:2011-01-10,
纸质出版:2011
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张志春, 强洪夫, 高巍然. 一种光滑粒子流体动力学-有限元法转换算法及其在冲击动力学中的应用[J]. 西安交通大学学报, 2011,45(1):105-110.
Conversion of 3D Distorted Finite Elements into SPH Particles During Impact Dynamic Deformation[J]. 2011, 45(1): 105-110.
为了解决冲击动力学中的大变形问题
提出了一种光滑粒子流体动力学-有限元法(SPH-FEM)转换算法
以等效Mises应力作为转换判据
将冲击过程中局部大变形区域的有限元网格转换为SPH粒子.该算法在大变形区域使用具有优势的SPH
在小变形区域使用精度和效率更高的FEM
为冲击动力学问题的数值计算提供了一条有效途径.使用SPH-FEM转换算法对圆柱形钢弹正冲击钢板发生冲塞破坏的过程进行了三维数值计算
计算结果与实验吻合较好
显示了该算法在计算精度方面的优势.在实际工程中
需要根据具体材料的失效模式
选择更加合适的转换判据.
An algorithm to automatically convert 3D distorted finite elements into SPH(smoothed particle hydrodynamics)particles is proposed
which handles the problems with extreme distortions in impact dynamics. Mises stress criterion is taken
and the SPH-FEM(finite element method)conversion algorithm allows to use accurate and efficient FEM in the lower distortion regions
and SPH in the higher distortion regions. The perforation of a cylindrical steel projectile impacting a plate target is simulated in 3D using the SPH-FEM conversion algorithm. The good agreement between the computed result and the experimental observation shows the accuracy superiority of this algorithm. Corresponding conversion criterion should be chosen according to the material failure mode in engineering application.
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JOHNSON G R, STRYK R A. Conversion of 3D distorted elements into meshless particles during dynamic deformation [J]. International Journal of Impact Engineering, 2003, 28(9): 947-966.
LIU Guirong, LIU Moubin. Smoothed particle hydrodynamics: a meshfree particle method [M]. Singapore: World Scientific, 2004:35-40.
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强洪夫,高巍然. 修正变光滑长度SPH方法及其应用[J]. 解放军理工大学学报:自然科学版, 2007,8(5): 419-424.
QIANG Hongfu, GAO Weiran. Modified SPH method considering full variable smoothing lengths effects and its applications [J]. Journal of PLA University of Science and Technology: Natural Science Edition, 2007, 8(5):419-424.
强洪夫,高巍然. 完全变光滑长度SPH法及其实现[J]. 计算物理, 2008, 25(5): 569-575.
QIANG Hongfu, GAO Weiran. SPH method with fully variable smoothing lengths and implementation [J]. Chinese Journal of Computational Physics, 2008, 25(5): 569-575.
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计算网格下的高性能MODIS蒸散发反演研究. 西安交通大学学报,2010,34(10):36-41.
一种基于非结构化网格的流体体积法界面重构方案. 西安交通大学学报,2010,34(9):99-103.
基于弹簧近似的非结构化网格自适应处理方法. 西安交通大学学报,2010,34(9):104-108.
采用离散粒子群算法的网格任务安全级调度. 西安交通大学学报,2010,34(6):21-26.
一种三维切削网格上的N-S方程离散方法. 西安交通大学学报,2010,34(5):15-20.
一种方向提升小波变换和网格编码量化的图像编码算法. 西安交通大学学报,2010,34(2):67-71.
一种求解N-S方程的自适应直角网格方法. 西安交通大学学报,2009,33(11):11-17.
气泡堆积法生成曲线多边形区域非结构化网格及其应用. 西安交通大学学报,2009,33(11):109-113.
气泡堆积法生成局部加密非结构化网格. 西安交通大学学报,2009,33(9):19-22.
一种二维贴体网格改进算法的研究. 西安交通大学学报,2009,33(3):60-64.
基于气泡堆积的非结构化网格生成技术. 西安交通大学学报,2009,33(1):29-33.
采用R*-tree的三角网格曲面非均匀精简算法. 西安交通大学学报,2008,32(9):1179-1183.
算子分裂法求解旋转坐标系下不可压黏性流动. 西安交通大学学报,2007,31(7):833-837.
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