用G泛函法求钢管冷斜轧延伸变形区中三维运动初始速度场  

Calculation of 3D Initial Velocity Field in Cold Oblique Rolling Process of Seamless Tube by G Function

作　　者：张园园[1] 秦建平[1] 芦晶[2] 

机构地区：[1]太原重型机械学院材料科学与工程分院,太原030024 [2]陕西工业职业技术学院,咸阳712000

出　　处：《太原重型机械学院学报》2002年第1期60-63,共4页Journal of Taiyuan Heavy Machinery Institute

摘　　要：本文建立了与刚塑性有限元中总能耗率泛函近似的G泛函 ,用其泛函的驻值条件得到的线性方程组解出的速度场作为真实速度场迭代求解中的迭代初始值 ,此初始值与真实值比较接近 ,可减少迭代次数 ,加快收敛。A function is set up which is similar to energy consumed rate function.It can be used to make non linear equation got from standing value condition and the latter can be converted into linear equation.Through calculation a velocity field can be got,which can act as initial value of calculating real velocity field.This value is close to real one and can decrease times of iteration.

关 键 词：初始速度场 近似泛函 冷斜轧 变形区 管材轧制 G函数 

分 类 号：TG335.7[金属学及工艺—金属压力加工] TG335.19