摘要
本文从岩石的变形特性和界面约束理论出发,建立了应变软化规律及其有限元本构方程。这种方程的求解存在着解法难与收敛慢和漂移界面的两个问题:其一,分析各种解法,采用初应力法,并进行改进(称改进的初应力法)以加速其收敛;其二,考查比较了各种漂移界面的修正法,选取了一种较佳的方法。于是,编制了一个相应的EPSF程序。最后对金川某巷道进行软化有限元分析。
Based upon rock deformation characteristics and bounding surface model, a strain-softening law and its constitutive equation were established. Two difficult problems of solution by finite element and surface drifting exist in the equation. First, after numerical approaches to softening problem were evaluated, an initial stress method was employed and then improved, called improved initial stress method, to accelerate convergence. Secondly, various surface drifting updatings were compared, and a good correct...
出处
《有色金属》
CSCD
1990年第1期1-8,共8页
Nonferrous Metals
关键词
应变软化
有限元
初应力法
界面漂移
strain-softening
initial stress method
surface drifting.
