网格对潜孔锤钻头球齿冲击过程数值模拟的影响  

Effect on Numerical Simulation of DTH Hammer Bit Insert Impact Process by Mesh Size

作　　者：瞿叶高[1] 卜长根[1] 刘宝林[1] 

机构地区：[1]中国地质大学〈北京〉工程技术学院,北京100083

出　　处：《探矿工程（岩土钻掘工程）》2007年第6期10-13,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：国家自然科学基金项目(项目编号:50475056)

摘　　要：潜孔锤钻头冲击钻进的过程是一个高度非线性、大变形、破坏的过程。对这一复杂过程的研究,目前主要是利用实验方法。应用非线性显式三维有限元求解程序LS-DYNA3D,采用与岩石性质较接近的混凝土模型,对潜孔锤钻头硬质合金球齿冲击混凝土板的过程进行了仿真计算,讨论了不同网格尺寸对冲击力、冲击速度及破碎坑深度的影响等。The process of down-the-hole hammer （DTH） drilling is very complex because of its high non-linear, large deformation and damage behavior. For this complex problem, current studies are mainly based on experiments. The process, impacting concrete slab with tungsten carbide button of DTH hammer bit, was simulating calculated by non - linear finite element software LS-DYNA3D on concrete model, the effects of different target mesh sizes of concrete on impaction force, impact velocity and penetration depth was discussed.

关 键 词：潜孔锤钻头 硬质合金球齿 冲击 网格尺寸 LS—DYNA3D 

分 类 号：P634.41[天文地球—地质矿产勘探]