【做题拿分】4.2 的动网格的确好用，建议大家试试，用这个练练手吧

TBE_Legend · 发表于 2011-7-11 21:52:22

本帖最后由 TBE_Legend 于 2011-7-11 22:06 编辑

要求：求解到35秒，不容许出现 inverted mesh

题目的模型已经建好了，你只需要照着帮助文档中的说明，做几个手动remesh就好了。

发现：

动网格结果需要开启 quality中的 recover，否则有可能根本不对，见附件中的图片（开启，recover和不开启recover的区别）。
automatic remeshing 不好用，总是出现 inverted mesh。
发现手动remesh时，从旧网格到新网格，comsol用的是recover的，嗯，这点很满意。

============================================================
Time-dependent solver (BDF)
Number of degrees of freedom solved for: 2631.
Nonsymmetric matrix found.
Step Time Stepsize Res Jac Sol Order Tfail NLfail
0 0 out 2 3 2 0
1 0.019 0.019 3 4 3 1 0 0
2 0.038 0.019 4 4 4 1 0 0
3 0.076 0.038 5 4 5 2 0 0
4 0.152 0.076 6 5 6 1 0 0
5 0.304 0.152 7 6 7 1 0 0
6 0.608 0.304 8 7 8 1 0 0
1 - out
7 1.216 0.608 9 8 9 1 0 0
2 - out
8 2.432 1.216 10 9 10 1 0 0
3 - out
9 4 1.568 out 11 9 11 1 0 0
10 5 1 out 12 9 12 1 0 0
11 6 1 out 13 9 13 1 0 0
12 7 1 out 14 9 14 1 0 0
13 8 1 out 15 9 15 1 0 0
14 9 1 out 16 10 16 2 0 0
15 10 1 out 17 10 17 2 0 0
16 11 1 out 18 10 18 2 0 0
17 12 1 out 19 10 19 2 0 0
18 13 1 out 20 10 20 2 0 0
19 14 1 out 21 10 21 2 0 0
20 15 1 out 22 10 22 2 0 0
21 16 1 out 23 10 23 2 0 0
22 17 1 out 24 10 24 2 0 0
23 18 1 out 25 10 25 2 0 0
24 19 1 out 26 10 26 1 0 0
Time-stepping completed.
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 416
Minimum element quality: 0.897
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 416
Minimum element quality: 0.897
Time-dependent solver (BDF)
Number of degrees of freedom solved for: 2619.
Nonsymmetric matrix found.
Step Time Stepsize Res Jac Sol Order Tfail NLfail
0 19 out 2 3 2 0
1 19.006 0.006 3 4 3 1 0 0
2 19.012 0.006 4 4 4 1 0 0
3 19.024 0.012 5 4 5 2 0 0
4 19.048 0.024 6 5 6 1 0 0
5 19.096 0.048 7 6 7 1 0 0
6 19.192 0.096 8 7 8 1 0 0
7 19.384 0.192 9 8 9 1 0 0
8 19.768 0.384 10 9 10 1 0 0
20 - out
9 20.368 0.6 11 9 11 1 0 0
10 20.968 0.6 12 9 12 1 0 0
21 - out
11 21.568 0.6 13 9 13 1 0 0
22 - out
12 22.168 0.6 14 9 14 2 0 0
13 22.768 0.6 15 9 15 2 0 0
23 - out
14 23.368 0.6 16 9 16 2 0 0
15 23.968 0.6 17 9 17 2 0 0
24 - out
16 24.568 0.6 18 9 18 2 0 0
25 - out
17 25.168 0.6 19 9 19 2 0 0
Time-stepping completed.
=================== Saved remesh 2re.mph ===================
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 418
Minimum element quality: 0.9036
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 418
Minimum element quality: 0.9036
Time-dependent solver (BDF)
Number of degrees of freedom solved for: 2631.
Nonsymmetric matrix found.
Step Time Stepsize Res Jac Sol Order Tfail NLfail
0 25 out 2 3 2 0
1 25.005 0.005 3 4 3 1 0 0
2 25.01 0.005 4 4 4 1 0 0
3 25.02 0.01 5 4 5 2 0 0
4 25.04 0.02 6 5 6 1 0 0
5 25.08 0.04 7 6 7 1 0 0
6 25.16 0.08 8 7 8 1 0 0
7 25.32 0.16 9 8 9 1 0 0
8 25.64 0.32 10 9 10 1 0 0
26 - out
9 26.14 0.5 11 9 11 1 0 0
10 26.64 0.5 12 9 12 1 0 0
27 - out
11 27.14 0.5 13 9 13 1 0 0
12 27.64 0.5 14 9 14 2 0 0
28 - out
13 28.14 0.5 15 9 15 2 0 0
14 28.64 0.5 16 9 16 2 0 0
29 - out
15 29.14 0.5 17 9 17 2 0 0
16 29.64 0.5 18 9 18 2 0 0
30 - out
17 30.14 0.5 19 9 19 2 0 0
Time-stepping completed.
=============== Saved manual remesh re3.mph ================
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 426
Minimum element quality: 0.8755
============================================================
Number of vertex elements: 8
Number of boundary elements: 62
Number of elements: 426
Minimum element quality: 0.8755
Time-dependent solver (BDF)
Number of degrees of freedom solved for: 2679.
Nonsymmetric matrix found.
Step Time Stepsize Res Jac Sol Order Tfail NLfail
0 30 out 2 3 2 0
1 30.005 0.005 3 4 3 1 0 0
2 30.01 0.005 4 4 4 1 0 0
3 30.02 0.01 5 4 5 2 0 0
4 30.04 0.02 6 5 6 1 0 0
5 30.08 0.04 7 6 7 1 0 0
6 30.16 0.08 8 7 8 1 0 0
7 30.32 0.16 9 8 9 1 0 0
8 30.64 0.32 10 9 10 1 0 0
31 - out
9 31.14 0.5 11 9 11 1 0 0
10 31.64 0.5 12 9 12 1 0 0
32 - out
11 32.14 0.5 13 9 13 1 0 0
12 32.64 0.5 14 9 14 2 0 0
33 - out
13 33.14 0.5 15 9 15 2 0 0
14 33.64 0.5 16 9 16 2 0 0
34 - out
15 34.14 0.5 17 9 17 2 0 0
16 34.64 0.5 18 9 18 2 0 0
35 - out
17 35.14 0.5 19 9 19 2 0 0
Time-stepping completed.

复制代码

shoney · 发表于 2011-7-12 21:32:37

谢谢lz
对于lz的第一个发现，lz能不能详细解释下，为什么开启或不开启recover会对结果有影响？

chbo76 · 发表于 2011-9-24 17:58:53

谢谢了，我做了一下。

ikrai · 发表于 2011-9-26 00:08:03

动网格是ale模块么，这个和平时说的自适应有什么区别呢，之前都在用ansys，最近项目需要刚开始学Comsol，多谢指教。

chbo76 · 发表于 2011-9-26 08:58:10

动网格和自适应网格不是一回事。

chbo76 · 发表于 2011-9-26 09:01:01

这个是物体主动运动的一个例子，物体运动速度自己设定。
什么时候，版主能放一个物体受力运动的例子来做做就好了。

lizhiling · 发表于 2011-10-7 13:32:56

下载了，感谢

qupu0504 · 发表于 2011-10-11 10:01:09

我也想学习comsol,可是资料较少,多谢提供实例......

yyfc1106 · 发表于 2012-3-22 17:59:49

谢谢楼主分享

neptune527 · 发表于 2012-3-23 13:08:33

好东西啊，一定要学

leonfxl1860 · 发表于 2012-3-23 13:18:37

请问版主，如何把几次计算结果合并到一起导出动画？

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[07.动网格] 【做题拿分】4.2 的动网格的确好用，建议大家试试，用这个练练手吧

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