王俊杰.一类DGH方程的新保结构算法研究[J].,2016,56(4):432-440 |
一类DGH方程的新保结构算法研究 |
Research on new structure-preserving algorithms for a DGH equation |
|
DOI:10.7511/dllgxb201604016 |
中文关键词:哈密顿系统保结构算法多辛理论DGH方程 |
英文关键词:Hamilton systemstructure-preserving algorithmsmulti-symplectic theoryDGH equation |
基金项目:云南省教育厅科学研究基金资助项目(2015y490);普洱学院创新团队项目(CXTD003). |
|
摘要点击次数:1385 |
全文下载次数:1405 |
中文摘要: |
DGH方程作为一类重要的非线性水波方程有着广泛的应用前景.基于哈密顿系统的多辛理论研究了一类DGH方程的数值解法,利用平均向量场方法对此哈密顿系统进行了数值离散,构造了DGH方程的局部能量保结构算法和局部动量保结构算法.数值算例表明,这两种保结构算法具有较好的长时间数值稳定性. |
英文摘要: |
DGH equation is an important nonlinear wave equation and has broad application prospect. Numerical method for the equation is studied based on the multi-symplectic theory in Hamilton system. The average vector field (AVF) method is used to discretize the Hamilton system, and local energy structure-preserving algorithm and local momentum structure-preserving algorithm are constructed to solve the DGH equation. The numerical examples show that the two kinds of structure-preserving algorithms have good long-time numerical stability. |
查看全文查看/发表评论下载PDF阅读器 |
| --> 关闭 |