加权变系数的瞬态导热有限元法  

A FINITE ELEMENT ANALYSIS OF TRANSIENT HEAT CONDUCTION WITH WEIGHTED VARIABLE FACTOR

作　　者：杨汇涛[1] 韩振兴[1] 

机构地区：[1]北京航空航天大学

出　　处：《航空动力学报》1997年第1期95-97,共3页Journal of Aerospace Power

摘　　要：研究了两点时间差分格式的瞬态导热温度场有限元法数值解的稳定性和振荡现象，推导出消除振荡的方法：将时间差分格式的加权系数σ与时间步长△ｔ分别和温度振荡联系起来，得出变σ和变△ｔ的函数关系式。实践证明该方法简便易行，精度高。The stability and oscillation of numerical finite element solution of transient conduction temperature field with two-point time deference scheme have been investigated.The weighted factor of the time diference scheme σ and the time step △ t are correlated to the temperature oscillation respectively.Thus the functions of variable σ and △ t are obtained.Its application demonstrates the simplicity in programming,high aecuracy and econmy of running time.

关 键 词：瞬态状况 导热性 有限元法 

分 类 号：TK16[动力工程及工程热物理—热能工程] O242.21[理学—计算数学]