采用了切线矢量加载和边界单元的约束方法建立分析模型。

In this paper, the tangent vector loading method and the boundary element restrain method was presented.

youdao

这上面有一个帽子表示它是单位矢量，T表示它是切线。

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

youdao

其次，基于CR列式法推导出了大旋转小应变空间杆单元及平面梁单元的内力矢量及切线刚度矩阵；

Then, based on the CR formulation, the internal force vector and tangent stiffness matrix of large rotation and small strain space bar and plane beam element are deduced.

youdao

The tangent's pointing towards the direction you are headed at that instant.

切线的方向就是,速度矢量在那个瞬时的指向

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