讨论了粘弹性方程的质量集中非协调有限元Crank-Nicolson全离散逼近格式.不需要传统的Riesz投影算子,用一些新的技巧和单元的特殊性质得到了L2模和能量模的最优误差估计.
In this paper the Crank-Nicolson full-discrete approximation scheme of the lumped mass nonconforming finite element method for viscoelasticity type equations is discussed.Without using tradtional Riesz projection operator,the optimal error estimations of L2-norm and energy-norm are obtained based on some novel techniques and special properties of the elements.