摘要
在渗流计算中,通常所采用的线性有限元以其应用广泛、简单、方便备受喜爱,但存在精度低、节点多、耗费机时等弊端。而非线性有限元精度高、节点少、节省机时,因此特别对二次有限元进行了详尽的理论推导,并对理想模型进行计算。
In permeable flow calculation, linear finite element shows many excellent properties, for instance, it is very popular for its simple and convenient and widely used. But linear finite element also shows many defects such as lower precision, much nodes and expense of time of computer. Nonlinear finite element shows properties of high precision, little nodes and time of computer. We specially made a detailed deduction of twice finite element and calculation for ideal model.
