Curvature 曲率4) curvity1.The bending moment,reverse curvature at one time,remain curvature at given scheme and mathematics model of precision for straightener roller are calculated base on the bending theory of elastics and plastics,applied overlap method. 在充分考虑二辊矫直机生产工艺特点的基础上,从矫直基本原理入手,根据弹塑性弯曲理论,应用迭代法计算了轧件一次弯曲矫直时的弯曲力矩和相应的反弯曲率,计算给定方案下形成的残余曲率,给出了矫直精度的数学模型 曲率 1.The practice of predicting natural fracture zones in deep formation in An Peng oilfield indicates that the extremum main curvity method has definite reliability in predicting pull apart fractures of homogeneous terranes. 安棚油田深层系预测天然裂缝发育带的实践表明 ,极值主曲率法在结构均一岩层构造拉张裂缝的预测中具有一定的可信度。
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