摘要
岩石的力—凿深特性是冲击钻进波动力学研究的一个重要边界条件和基本参量,利用两点测量法对岩石的动态凿入特性进行实验研究,并考虑了钻头端部变截面和凿入速度对力—凿深特性的影响,运用最小二乘法的曲面拟合,得出了更为精确的凿入系数和粘度系数值,并在实验的基础上综合得到粘弹性类型岩石,即泰山花岗岩力 凿深特性的一般模式.
The force-penetration characteristic of rock is substantial boundary condition and basic parameter in dynamics of percussive drilling. The dynamic penetration characteristic of rock is determined in each test by using the two-point strain measurement; and the non-uniform rod with variable characteristic impedance and the penetrating velocity are taken into account. The accurate dynamic penetration coefficient and viscous damping coefficient of rock are evaluated by regression analysis, and the typical model of the force-penetration relation of the viscoelastic rock, Taishan granite, is determined.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2003年第5期22-25,42,共5页
Engineering Journal of Wuhan University
关键词
两点应变测量法
岩石的力-凿深特性
凿入系数
粘度系数
method form two-point strain measurement
force-penetration characteristic of rock
dynamic penetration coefficient
viscous damping coefficient
