二次样条元

The Square Spline Element

利用二次Ｂ样条函数构造样条元的位移场函数，建立了弹性直梁样条元和薄板的半解析样条元，并计算了等截面、变截面梁和板．结果表明，二次样条元具有未知量少、精度高、占用计算机内存少等优点。

The square B-spline function was used as the function of displacement field.The spline element of elastic straight beam and semi-analytical spline element of thin slab were derived.Several examples about constant or variable thickness beams and slabs were computed. The results show that the square spline elements have higher accuracy,less unknowns and occupation of memory space than the common elements or strip elements.