The concrete expression of the unit tangent line stiffness matrix is given.

讨论了桥梁结构分析中常用单元切线刚度矩阵的具体表达形式。

youdao

At any knots, the nearly arc length are precise for the resulting nearly arc length parametric curve, and it has the unit tangent same as that of the real arc length parametric curve.

所作近似弧长参数化曲线在插值节点处，近似弧长是精确的，并且具有与精确弧长参数曲线同方向的单位切矢。

youdao

It has a hat because it's a unit vector, and t because it's tangent.

这上面有一个帽子表示它是单位矢量，T表示它是切线。

youdao