point of tangency

基本解釋

To determine the point of tangency and the point of interaction of the line segment of the section pass meaningful to the pass analysis and wire cutting program.
確定型鋼孔型各線段的切點或交點對孔型分析及線切割程序有重要意義。
The tangency point of Bottom Hole Assembly is located at where the drill string just touches the wall of the borehole, and the contact force is zero here.
在計算底部鉆具組合的受力和變形時，以前一般都是按彎矩為零的條件來確定其上切點的位置。
Therefore, the method to determine the position of tangency point should be based on this condition instead of the traditional one which requires the moment is zero here.
提出了一種新觀點，即按照鉆柱與井壁的接觸力為零的條件來確定這一位置。