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- 2004-9-28
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- 1970-1-1
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我做的还是轧制过程的仿真!
最近我做了很多尝试,希望marc能采用欧拉法进行计算,可是好象都没有成功,一旦marc开始算了,就发现他依然采用的是拉格郎日法!
我最近的方法是改变输入文件,在输入文件中加上“r-p flow,1,”,dat文件的开始几行如下:
title job1
$....MARC input file produced by MSC.Marc Mentat 2005 (32bit)
$...................................
$....input file using extended precision
extended
$...................................
sizing 1000000 55548 114273 0
elements 80
version 11
processor 1 1 1
$no list
r-p flow,1, (这里是定义的稳态分析)
couple 0
heat 0 0 1 2 1 1
all points
no echo 1 2 3
films 1012
setname 1189
end
$...................
solver
0 1 0 0 0 0 0 0 0 0 0 0
optimize 9
按理由,我采用了刚塑性流动的稳态分析,marc应当采用欧拉法进行计算,可是到了正式算的时候,我发觉他依然不是用的欧拉法,很奇怪的是,在output文件中,他清楚的标明了我采用了刚塑性流动的非稳态分析(见下面的out文件),也就是说,marc依然使用拉格朗日法进行计算。
*************************************************
*************************************************
program sizing and options requested as follows
element type requested************************* 80
element type requested************************* 39
number of elements in mesh********************* 55548
number of nodes in mesh************************ 114273
max number of elements in any dist load list*** 0
maximum number of point loads****************** 0
large displacement analysis flagged************
thermal stress analysis flagged****************
load correction flagged or set*****************
number of lists of distributed loads*********** 3
values stored at all integration points********
tape no.for input of coordinates + connectivity 5
no.of different materials 2 max.no of slopes 20
heat transfer analysis, extrapolation flag, ** 1
latent heats per element changed to *********** 1
gradient of scaler field printed***************
include convective terms in thermal equilibrium
number of elements with film coefficient b.c.** 2024
maximum number of distributed flux lists******* 3
rigid-plastic non-steady state flow solution******
(怎么变成了非稳态????????)
number of points on shell section ************* 11
geometry updated after each load step**********
new style input format will be used************
maximum number of set names is***************** 1189
coupled thermal-mechanical analysis flagged****
number of processors used ********************* 1
extended precision input is used **************
MSC.Marc input version ************************ 11
suppress echo of list items *******************
suppress echo of bc summary *******************
suppress echo of nurbs data *******************
end of parameters and sizing
*************************************************
*************************************************
我做过了e7x1c.dat这个例子,成功了,然后我稍微改变模型,定义了接触,这时我发觉它也不再采用欧拉法了,因为他也是rigid-plastic non-steady state flow solution******,晕!!!
我就奇怪了,为什么我明明要求的是刚塑性稳态分析,结果却成了非稳态分析呢?难道用欧拉法计算时不能定义接触吗?如果这样,那marc 的帮助文档volume A的地119页上面的例子不是哄人的吗?
急等高手指教! |
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