> For the complete documentation index, see [llms.txt](https://manual-2.karamba3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual-2.karamba3d.com/chinese_2_0_0/3-in-depth-component-reference/3.8-utilities/3.8.8-principal-states-transformation.md).

# 3.8.8: 主要状态转型 (Principal States Transformation) 🔷

使&#x7528;**“Principal States Transformation（主要状态转换）”**&#x8FD0;算器，用户可以通过第一和第二主矢&#x91CF;**“Vec1”**&#x548C;**“Vec2”**&#x5B9A;义张量，并获得给定方&#x5411;**“DirX”**&#x7684;运算器。例如，这允许计算垂直&#x4E8E;**“DirX”**&#x65AD;面的壳体的弯矩或平面力。**“N”**&#x5219;用来指定执行转型之前&#x5C06;**“Vec1”**&#x548C;**“Vec2”**&#x6295;影到平面上的法线方向。
