24小时热门版块排行榜    

查看: 669  |  回复: 2
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

ddwy

木虫 (小有名气)

[求助] 分子动力学模拟出错 已有1人参与

大家好:
我用DL_POLY做分子动力学模拟,CONTROL输入文件是:

temperature 298.15
# pressure 0.001
ensemble nvt hoover  0.5

integrat velocity
restart
steps 3000000
equilibration 1000000
mult  1
scale  5
stats 20
rdf            10
print rdf

traj 1000001 100 0

densvar 20

timestep 0.002
cutoff        12.0

ewald precision 1.0E-6

minimise energy 50 5.0E-03

shake 1.0E-6
mxshak  10000
quaternion tolerance  1.0E-05

job time       99999999999999.0
close time     200000.0

finish
但是计算到第步的时候出现错误,OUTPUT文件为:
----------------------------------------------------------------------------------------------------------------------------------
   174600 -2.8822E+04  2.9815E+02 -3.1606E+04  3.9295E+03 -3.5876E+04  1.7169E+02  1.0398E+02  6.5269E+01  0.0000E+00
349.20000 -2.9405E+04  0.0000E+00  9.0503E+03 -9.0711E+04  3.5875E+04  8.3469E+01  0.0000E+00  6.3803E+04  0.0000E+00
119751.3  4.9579E+04  0.0000E+00  0.0000E+00  0.0000E+00  9.0000E+01  9.0000E+01  9.0000E+01  0.0000E+00 -1.2860E+00

  rolling -2.6814E+04  2.9487E+02 -2.9563E+04  4.1468E+03 -3.4341E+04  3.6908E+02  1.8861E+02  7.4187E+01  0.0000E+00
averages -2.6525E+04  0.0000E+00  6.3658E+03 -9.3434E+04  3.4340E+04  1.4041E+03  0.0000E+00  6.4056E+04  0.0000E+00
           4.9579E+04  0.0000E+00  0.0000E+00  0.0000E+00  9.0000E+01  9.0000E+01  9.0000E+01  0.0000E+00 -8.0166E-02
----------------------------------------------------------------------------------------------------------------------------------

*** warning - global constraint number         6 , with particle numbers:      2885 &      2886 ,
converges to a length of     7.94 Angstroms with a factor  3.1039E+01 ,contributes towards next error !!! ***

*** warning - global constraint number         7 , with particle numbers:      2885 &      2887 ,
converges to a length of    12.88 Angstroms with a factor  8.2412E+01 ,contributes towards next error !!! ***

*** warning - global constraint number         8 , with particle numbers:      2886 &      2887 ,
converges to a length of    18.15 Angstroms with a factor  1.0006E+02 ,contributes towards next error !!! ***

DL_POLY_4 terminated due to error   105

error - shake algorithm (constraints_shake) failed to converge
"OUTPUT" 64939L, 6075639C                     


请各位指点一下,谢谢
回复此楼

» 猜你喜欢

» 本主题相关商家推荐: (我也要在这里推广)

» 本主题相关价值贴推荐,对您同样有帮助:

我喜欢收集微笑没有原因……
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

ddwy

木虫 (小有名气)

引用回帖:
2楼: Originally posted by lsloneil at 2014-09-04 10:45:22
http://www.uark.edu/ua/fengwang/DLPOLY2/node350.html

Message 105: error - shake algorithm failed to converge

The RD-SHAKE algorithm for bond constraints is iterative. If the maximum number of p ...

shake 1.0E-6
mxshak  10000
上面这一部分信息不是shake tolerance的设置吗?
我喜欢收集微笑没有原因……
3楼2014-09-05 16:13:18
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 3 个回答

lsloneil

专家顾问 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
http://www.uark.edu/ua/fengwang/DLPOLY2/node350.html

Message 105: error - shake algorithm failed to converge

The RD-SHAKE algorithm for bond constraints is iterative. If the maximum number of permitted iterations is exceeded, the program terminates. Possible causes include: a bad starting configuration; too large a time step used; incorrect force field specification; too high a temperature; inconsistent constraints involving shared atoms etc.
Action:
Corrective action depends on the cause. It is unlikely that simply increasing the iteration number will cure the problem, but you can try: follow the standard user response to increase the control parameter mxshak. But the trouble is much more likely to be cured by careful consideration of the physical system being simulated. For example, is the system stressed in some way? Too far from equilibrium?

试试从以上提出的可能性来查找错误。另外,怎么没看见shake tolerance关键字?
2楼2014-09-04 10:45:22
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[硕博家园] 售SCI文章,我:8O.5.5.1O.54,科目全,可十急 +7 0TEMgxdT1eIw 2026-11-09 10/500 2026-11-15 00:39 by Equinoxhua
[考研] 售SCI一区T0P文章,我:8.O.55.1.O54,科目全,可伽急 +6 FChKX8meu1ds 2026-11-09 9/450 2026-11-14 22:39 by Equinoxhua
[考博] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +4 FChKX8meu1ds 2026-11-09 8/400 2026-11-14 22:04 by Equinoxhua
[考博] 考博求助 10+3 社会实践对别 2026-11-08 3/150 2026-11-13 14:04 by 沐小虫252
[考研] 售SCI一区文章,我:8.O.551.O.5.4,科目全,可伽急 +5 C6CRn66RYYXS 2026-11-10 6/300 2026-11-13 11:04 by Equinoxhua
[硕博家园] 售SCI一区T0P文章,我:8O.55.1.O.54,科目全,可伽急 +5 C6CRn66RYYXS 2026-11-10 9/450 2026-11-13 11:02 by Equinoxhua
[基金申请] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +4 Z7qfCsdIiD1T 2026-11-11 5/250 2026-11-12 11:44 by HajghKOMynmz
[基金申请] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +4 Z7qfCsdIiD1T 2026-11-10 7/350 2026-11-12 11:33 by HajghKOMynmz
[考博] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +3 Z7qfCsdIiD1T 2026-11-10 5/250 2026-11-12 11:25 by HajghKOMynmz
[基金申请] 售SCI文章,我:8O5.5.1.O.54,科目齐全,可+急 +5 czAiolzR0IJC 2026-11-10 9/450 2026-11-12 11:11 by HajghKOMynmz
[考博] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +4 czAiolzR0IJC 2026-11-10 7/350 2026-11-12 11:11 by HajghKOMynmz
[考博] 售SCI一区T0P文章,我:8.O.55.1.O.54,科目齐全,可+急 +3 G2rhSvqvhNzl 2026-11-10 5/250 2026-11-12 10:49 by HajghKOMynmz
[硕博家园] 售SCI文章,我:8O.5.5.1O.54,科目全,可十急 +4 G2rhSvqvhNzl 2026-11-10 6/300 2026-11-12 10:49 by HajghKOMynmz
[考博] 售SCI一区T0P文章,我:8.O.55.1.O54,科目全,可伽急 +4 C6CRn66RYYXS 2026-11-10 6/300 2026-11-12 10:27 by HajghKOMynmz
[教师之家] 售SCI一区T0P文章,我:8.O.55.1.O.54,科目齐全,可+急 +3 TgvkbZZl9tqB 2026-11-11 4/200 2026-11-12 08:15 by HajghKOMynmz
[考研] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +3 cdqGD6ftHmbl 2026-11-11 3/150 2026-11-12 07:53 by HajghKOMynmz
[公派出国] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +3 czAiolzR0IJC 2026-11-10 5/250 2026-11-12 06:36 by 9fOTqj074tIg
[教师之家] 售SCI一区T0P文章,我:8O.55.1.O.54,科目全,可伽急 +4 FChKX8meu1ds 2026-11-09 7/350 2026-11-12 05:19 by 9fOTqj074tIg
[教师之家] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +6 0TEMgxdT1eIw 2026-11-09 8/400 2026-11-12 05:00 by 9fOTqj074tIg
[公派出国] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +5 zSbvVX9JFl9J 2026-11-09 8/400 2026-11-12 04:57 by 9fOTqj074tIg
信息提示
请填处理意见