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请教楼主,我也是模拟二氧化硅气体吸附,请问楼主在模拟的过程中,经过能量极小化之后,做动力学模拟的阶段,会出现下面的报错嘛 Step 0, time 0 (ps) LINCS WARNING relative constraint deviation after LINCS: rms nan, max inf (between atoms 8882 and 8883) bonds that rotated more than 30 degrees: atom 1 atom 2 angle previous, current, constraint length Wrote pdb files with previous and current coordinates 这是什么原因造成的呢,谢谢楼主。 |
sdf 发表于 2021-8-13 11:09 不要 开始就设置1000,从大到小多em几次。比如开始2000,然后1500,再1000这样。 |
小潘潘 发表于 2021-10-21 10:37 二氧化硅可以用这里的10.1021/cm500365c |
| 请问楼主用的什么力场?我也在做这类材料,不知道用什么力场会比较好? |
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您好,请问一下,我也是用MS构建的结构,可是我在能量最小化时达不到收敛,请问你遇到过这种情况吗?该怎么处理呢? Energy minimization has stopped, but the forces have not converged to the requested precision Fmax < 1000 (which may not be possible for your system). It stopped because the algorithm tried to make a new step whose size was too small, or there was no change in the energy since last step. Either way, we regard the minimization as converged to within the available machine precision, given your starting configuration and EM parameters. Double precision normally gives you higher accuracy, but this is often not needed for preparing to run molecular dynamics. writing lowest energy coordinates. Steepest Descents converged to machine precision in 15 steps, but did not reach the requested Fmax < 1000. Potential Energy = -9.0887500e+04 Maximum force = 1.1054751e+04 on atom 51 Norm of force = 3.9257707e+03 |
Lacrimosa 发表于 2020-7-25 21:57 好了 谢谢老师! |
shun 发表于 2020-7-29 14:32 MS晶体库中切面,然后扩展一下就可以了 |
| 请教楼主,二氧化硅层是怎么构建的? |
| 周期性改成xyz三方向pbc还是不行吗?我看文献中用xyz的pbc没有这个问题 |
| 有老师解答一下嘛? |
| 补充一下,中间的水盒子是首先通过预平衡以及md模拟5ns之后的稳定构象,条件为xyz周期性条件。 然后去平衡后的构象与二氧化硅层组合,现在的条件为xy周期性,不知道是不是这个的原因? |
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