法曲率是刻画曲面在某一方向的弯曲程度的量，其有一定的计算公式。曲线 C 的曲率和曲面 S 沿 C 的切方向的法曲率具有联系。
Chapter 2 introduces some propaedeutics of classic differential geometry, which include the first basic form, the second basic form, normal curvature, main curvature, mean curvature, Gauss curvature, unit normal vector, main vector, etc.
第二章介绍一系列的预备知识,主要是关于古典微分几何中第一,第二基本形式的定义,法曲率,主曲率,平均曲率,Gauss曲率,单位法向量,主方向等的定义。
参考来源 - 离散曲面上曲率的刻划·2,447,543篇论文数据，部分数据来源于NoteExpress
两共轭齿面沿接触线法向的诱导法曲率是衡量机械传动性能的重要指标之一。
The induced normal curvature of two conjugate tooth surfaces along normal direction of contact line is one of the important indexes evaluating mechanical transmission performances.
以最大工作进给速度的变化比率为阈值，把零件表面的法曲率半径划分为不同的区域；
Using the changing rate of maximum feed-rate as a threshold, the surface of the part is divided into different areas according to the values of normal curvature radius.
介绍了圆锥滚子蜗杆凸轮机构的轮廓曲面方程的建立、压力角和啮合曲面法曲率的计算过程。
This paper describes the establishing process of the equation of working profile curved surface of worm CAM mechanism, the calculation of its pressure Angle and normal curvature.
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