牙轮钻头钻进岩石过程的数学模型和模拟方法——承力区假说与旋转压入法

Mathematical Model and Analogy Method for the Penetrating Process of Roller Bits,

根据“承力区假说”,建立了牙轮钻头钻进岩石过程的数学模型和模拟方法。利用这种模型和方法,可在计算机上实现对实际钻进过程的仿真和对牙齿载荷时间历程等的模拟。换言之,也就是借助于计算机仿真的手段,可把钻头机械钻速、牙齿载荷谱等与钻头结构设计参数、齿形和岩性联系起来。这对于牙轮钻头的研究无疑具有重大意义。

The mathematical model and analogy method for the penetrating process of roller bits arc established according to the load-bearing region hypothesis. By means of the model and the method, the penetrating process of the roller bit and the load-period of the bit's teeth can be simulated on computer. In other words, by means of computer simulation, the penetrating speed of the bit and the load spectrum of the bit's teeth can be connected with the bit design parameters, the tooth profile and the rock character.