| 发射药床自然堆积模拟 |
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| 引用本文： | 姜世平,芮筱亭,洪俊,王国平,徐浩.发射药床自然堆积模拟[J].弹道学报,2011,23(2):82-86. |
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| 作者姓名： | 姜世平 芮筱亭 洪俊 王国平 徐浩 |
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| 作者单位： | 1. 南京理工大学,发射动力学研究所,南京210094
2. 东南大学工程力学系,南京,210096 |
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| 基金项目： | 国家自然科学基金项目(10902051) |
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| 摘 要： | 为进行发射装药挤压破碎动力学研究,通过几何方法构建了初始构型下发射药床的动力学模型,采用牛顿-欧拉方程描述发射药粒的运动过程,应用线性连接目录法建立每个药粒的邻居目录,建立发射药粒接触识别算法及三维块体接触模型,在邻居目录内应用射线交叉法进行块体间的接触检索,模拟了发射药床在重力作用下的自然堆积过程.获得了发射药床的密...
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| 关 键 词： | 发射装药 挤压破碎 离散单元法 射线交叉法 邻居目录 |
Simulation on Packing Structure of Propellant Bed |
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| JIANG Shi-ping
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RUI Xiao-ting
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HONG Jun
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WANG Guo-ping
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XU Hao.Simulation on Packing Structure of Propellant Bed[J].Journal of Ballistics,2011,23(2):82-86. |
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| Authors: | JIANG Shi-ping RUI Xiao-ting HONG Jun WANG Guo-ping XU Hao |
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| Affiliation: | JIANG Shi-ping1,RUI Xiao-ting1,HONG Jun2,WANG Guo-ping1,XU Hao1(1.Institute of Launch Dynamics,NUST,Nanjing 210094,China,2.Department of Engineering Mechanics,Southeast University,Nanjing 210096,China) |
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| Abstract: | To research the dynamics of compress and fracture of propellant charge,the dynamic model of initial packing structure of propellant bed was constructed by geometry method.The motion state of propellant grains was described by Newton-Eulerian equations.Neighbor list was established for each grain by Linked Linear List method.The collision detection method of propellant grains was proposed;the contact model for spatial polyhedra was established.The Ray Crossing Method was applied for the collision detection o... |
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| Keywords: | propellant charge compress and fracture discrete element method ray crossing method neighbor list |
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