摘要
本文将函数转换法用于分离过程非线性方程的求解。当目标函数存在极值点或拐点时,采用该方法可改变牛顿法的搜索方向,即克服了牛顿法不收敛的困难,又不改变原目标函数的解。通过对极性、烃类物系和含氢体系的泡、露点的考核计算,表明该法收敛稳定,速度快,对初值不敏感;与Wegstein法相比,计算时间一般可节省3～4倍。
The functional transformation method is applied to solving-non-linear equations in separation process. When the objective functions have maxima, minima or turning points, the method can be used to alter the research direction of the Newton's method in which the non-convergent difficulties can not be met, and the solution of original functions doesn't be changed. The polar hydrocarbons systems and the systems containing hydrogen are used as examples to approve the applicability of the method in bubble-dew point caculations. The results show that the method is stable in convergence, quick in calculating and insensitive to the precise choice of initial temperature value. Comparing with the Wegstein's method, the calculating time needed is reduced by 3 to 4 times.
出处
《化学工程》
CAS
CSCD
北大核心
1989年第5期23-27,共5页
Chemical Engineering(China)
