Drill Down: Process Modeling, Simulation, execution.
流程建模、模拟与运行。
The simulation program for the valve motion was developed, and simulation tests were carried out on the valves of both Model F800 and Madel 3nb-1300 drill pumps.
此外编制了泵阀运动规律的仿真程序，并分别对F800钻井泵泵阀和3nb—1300钻井泵泵阀进行了仿真试验。
The simulation results show the resistance to the drill string by the diverter reaches the minimum and can be reduced by 46.98% compared with the original design.
仿真结果表明，转向器对钻柱的阻力达到最小，与原设计值相比，转向器阻力减小了46.98%。
Numerical method is proposed for general mechanical impact systems by means of characteristic line theory . Simulation results of hydraulic rock drill are provided .
应用特征线方法，提出了一般冲击机械的波动力学数值计算方法，给出了一液压凿岩机械的数值模拟结果。
Numerical simulation shows that the new method is more effective for the drill-string assembly unsuitable to be simplified as a torsion pendulum.
数值模拟结果表明，对不适于简化为扭转摆的钻柱系统，采用基于钻柱扭转杆模型的新方法进行设计可以取得相对较好的减振效果。
Obtained Stress, displacement variation of oil drill through the analysis of transient dynamics, Point to the occurrence of failure to provide the theoretical basis for simulation.
通过瞬态动力学分析得到钻柱在瞬态冲击下的应力、位移变化规律，为故障的发生点提供理论仿真依据。
The variation of normal stress in soil surrounding a drill-and-grout soil nail during drilling, grouting and pull-out is studied through both laboratory pull-out tests and numerical simulation.
抗拔强度的大小取决于拔出过程中作用于土钉表面的法向应力的大小。
The variation of normal stress in soil surrounding a drill-and-grout soil nail during drilling, grouting and pull-out is studied through both laboratory pull-out tests and numerical simulation.
抗拔强度的大小取决于拔出过程中作用于土钉表面的法向应力的大小。
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