【摘要】 高梯度是工程中关键的特征之一 ,本文讨论和研究描述高梯度问题的函数逼近 ,包括 :多项式函数逼近、复合函数逼近、Bezier函数逼近。基于Bezier函数描述 ,构建了一维Bezier耦合单元、六节点三角形耦合单元、八节点矩形耦合单元 ,这些单元都具有较好的高梯度描述能力 ,最后还给出有关的算例更多还原

【Abstract】 s: High gradient is an important aspect of key characteristics in engineering. The paper focuses on the descriptions and the treatments of this characteristic, including approximations of polynomial, composite function and Bezier based function. Further more, some elements which are capable to describe high gradient, such as ID Bezier coupling element, 6 node triangle Bezier coupling element, 8 node rectangle Bezier coupling element, are constructed and derived. Finally, some numerical examples are presented.更多还原