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.
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.
出处
《海军工程大学学报》
CAS
2003年第5期72-74,共3页
Journal of Naval University of Engineering
