double tangent 中文意思是什麼
double tangent
解釋
二重切線-
In the analysis, a cfst arch ( single tube ) is first divided into a finite number of straight beam elements. according to the virtual work principle and the modified newton - raphson iteration method the tangent stiffness matrix considering double nonlinear properties is established. with regard to the non - equilibrium forces, the material nonlinear property along the height of the section and the length of the element is considered and the computation accuracy is improved as a result
本文首先將拱肋劃分為一系列的直梁單元，運用虛功原理和修正newton - raphan數值迭代演算法的基本原理準確推導了拱肋直梁單元的非線性切線剛度矩陣；在不平衡力方面考慮了沿截面高度和單元長度方向材料非線性的發展過程，提高了計算精度；再根據得到的切線剛度矩陣採用荷載增量步內修正newton - raphan迭代的增量迭代法進行了求解。 -
First, the human body surface is divided into seven parts, and each part is created by the way of using double cubic b - spline surfaces. to attain g1 continuity on the stitching line of two b - spline surfaces, one order tangent condition is applied to the bound of each b - spline surface
首先，在人體建模過程中本文將人體表面分成七個部分，用雙三次b -樣條曲面模擬每一部分曲面，並在曲面的邊界處定義了一階切矢條件，使兩曲面片在拼接處達到了g ~ 1連續。
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