| 求刚性中子动力学方程数值解的新方法 |
| |
| 引用本文： | 张帆,蔡章生,蔡琦.求刚性中子动力学方程数值解的新方法[J].海军工程大学学报,2003,15(5):72-74. |
| |
| 作者姓名： | 张帆 蔡章生 蔡琦 |
| |
| 作者单位： | 海军工程大学,动力工程学院,湖北,武汉,430033 |
| |
| 摘 要： | 中子动力学方程是刚性方程,数值计算很费机时,为减少计算机时提出了许多算法,常用的有隐式盖分法、多步法和自动变步长法等,著名的方法有吉尔方法和埃米特方法.但这些方法的计算程序复杂且总计算时间减少不明显.消去刚性法是一个全新的算法,稳定步长可达到20 s,计算时间大大下降.
|
| 关 键 词： | 刚性方程 差分方程 数值解法 |
| 文章编号： | 1009-3486(2003)05-0072-03 |
| 修稿时间： | 2002年10月9日 |
A new way to determine a numerical solution of stiff neutron dynamics equation |
| |
| ZHANG Fan,CAI Zhang-sheng,CAI Qi.A new way to determine a numerical solution of stiff neutron dynamics equation[J].Journal of Naval University of Engineering,2003,15(5):72-74. |
| |
| Authors: | ZHANG Fan CAI Zhang-sheng CAI Qi |
| |
| Abstract: | The neutron dynamics equation is stiff, so it takes a long machine time in numerical computation. Many ways have been offered to save time, such as the explicit difference, implicit difference and auto-changed step ways, and etc. , among which the famous ways are Gearian and Hermitian. But the programs of these ways are very complex, and the reduction of machine time is not so obvious. The extinction of the equation stiffness is a new way. The steady time-step can reach 20 s, and the machine time is reduced greatly. |
| |
| Keywords: | stiff equation difference equation numerical solution |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
