困扰一周的问题，提示有过盈错误，上传INP

luyong85 · 发表于 2010-5-23 15:52:50

本帖最后由 luyong85 于 2010-5-23 16:05 编辑

运算后提示有过盈错误，我自己试图修改，可是一周过去了，仍然没有修改好，我看过本站的许多帖子，试过很多方案，都不成。无奈，肯请能者伸手，感激不尽，这上传INP了

shanhuimin923 · 发表于 2010-5-23 15:57:54

帖子貌似没编辑完整，该上传的也没上传....

luyong85 · 发表于 2010-5-23 16:18:38

2# shanhuimin923
用户名：zsq-w@sohu.com
密码： 222444
INP文件有点大，貌似上传不了，我发在版主提供的网盘上去了，希望大家辛苦一点去那帮我看看！

luyong85 · 发表于 2010-5-23 16:23:31

本帖最后由 luyong85 于 2010-5-23 16:27 编辑

3# luyong85

luyong85 · 发表于 2010-5-23 16:28:44

本帖最后由 luyong85 于 2010-5-23 16:41 编辑

4# luyong85
INP太大了，这回希望渺茫了，只有如此错误提示：
***WARNING: THE SYSTEM MATRIX HAS 1 NEGATIVE EIGENVALUES.
   IN AN EIGENVALUE EXTRACTION STEP THE NUMBER OF NEGATIVE EIGENVALUES IS
   EQUAL TO THE NUMBER OF EIGENVALUES BELOW THE CURRENT SHIFT POINT.
   THIS MAY BE USED TO CHECK THAT EIGENVALUES HAVE NOT BEEN MISSED.
   NOTE: THE LANCZOS EIGENSOLVER APPLIES AN INTERNAL SHIFT WHICH WILL
   RESULT IN NEGATIVE EIGENVALUES.
   IN A DIRECT-SOLUTION STEADY-STATE DYNAMIC ANALYSIS, NEGATIVE
   EIGENVALUES ARE EXPECTED. A STATIC ANALYSIS CAN BE USED TO VERIFY THAT THE SYSTEM IS STABLE.
   IN OTHER CASES, NEGATIVE EIGENVALUES MEAN THAT THE SYSTEM MATRIX IS NOT
   POSITIVE DEFINITE:
   FOR EXAMPLE, A BIFURCATION (BUCKLING) LOAD MAY HAVE BEEN EXCEEDED.
   NEGATIVE EIGENVALUES MAY ALSO OCCUR IF QUADRATIC ELEMENTS ARE
   USED TO DEFINE CONTACT SURFACES.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.1 IS OVERCLOSED BY 9.52480    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.4 IS OVERCLOSED BY 9.56749    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.5 IS OVERCLOSED BY 9.83563    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.143 IS OVERCLOSED BY 9.59188    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.144 IS OVERCLOSED BY 9.65159    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.145 IS OVERCLOSED BY 9.71390    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.146 IS OVERCLOSED BY 9.77242    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.147 IS OVERCLOSED BY 9.82332    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.148 IS OVERCLOSED BY 9.85755    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.149 IS OVERCLOSED BY 9.86097    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.150 IS OVERCLOSED BY 9.78978    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.151 IS OVERCLOSED BY 9.74493    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.152 IS OVERCLOSED BY 9.70111    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE
RAIL-1.153 IS OVERCLOSED BY 9.66202    WHICH IS TOO SEVERE.
CONTACT PAIR (ASSEMBLY_SURF-RAIL_LEFT,ASSEMBLY_SURF-WHEEL_CONTACT_LEFT) NODE

zsq-w · 发表于 2010-5-23 16:30:18

2# shanhuimin923
用户名：zsq-w@sohu.com
密码： 222444
INP文件有点大，貌似上传不了，我发在版主提供的网盘上去了，希望大家辛苦一点去那帮我看看！
luyong85 发表于 2010-5-23 16:18

发上去你要提供下载的链接啊. 不然别人如何下载？

vickydarling · 发表于 2010-5-23 18:03:00

检查一下mesh, increment step.

seawideyp · 发表于 2010-5-23 18:24:30

这种发帖方式估计还得困扰一周

luyong85 · 发表于 2010-5-23 20:33:46

7# vickydarling
我在verify 和查询里面的mesh gaps/intersection 检查过，有少量警告，有1.8%,但都处在无关紧要的地方，也应该没有不兼容的网格。用C3D8R单元。
增量步的话我初始定0.1，最小10e-7,最大1，我就定一个增量步，以前也尝试过两个步的，错误基本相同，而且静态一般用一步没什么问题。
我的模型材料属性很简单没用子程序，初始间隙大概在0.1mm左右，网格用的是4mm，模型最大尺寸是2m左右。
我如果接触间隙调整的话，就出现单元扭曲严重。实际上接触面附近单元是很规整的六面体单元，而且主面大于从面，从面网格细于主面

luyong85 · 发表于 2010-5-23 21:15:24

6# zsq-w
用户名：abaqus69@126.com
密码：123456
收件箱只有只有一个邮件，里面就是我这模型的INP文件，希望有能够解决类似的问题的人能出手相助，谢谢了，如果我解决了，我会在这里告诉大家的！

版主，一般网盘貌似不能直接连接下载，都需要密码。

洪亮 · 发表于 2010-5-24 11:48:27

网格变形太大了，有一些网格嵌入另外一些网格之内，导致计算无法完成。

zcl861116 · 发表于 2010-5-24 13:51:21

有没有error信息?
检查检查接触区域网格密度和质量

flike · 发表于 2010-5-24 14:25:45

（1）主面网格多选一些（区域最好要大于从面的）
（2）改tie的adjust=yes 为no。

以上均没试，你inp档太大了，偶电脑吃不消。

luyong85 · 发表于 2010-5-24 14:53:14

12# zcl861116
增量步越来越小，最后达到我设定的10-e7，就终止了，TOO many attempts for this increase.

luyong85 · 发表于 2010-5-24 14:58:13

按理来说，我这模型变形不会太大，我输入的参数都是按照标准来的，单位应该没问题，而且我查看了计算完的几个增量的结果，变形都不算大 11# 洪亮

seawideyp · 发表于 2010-5-24 14:59:24

数万的单元
一半的电脑会死掉的

jian10181107 · 发表于 2010-6-3 07:19:39

写的不错，非常感谢！！！

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[警告错误信息] 困扰一周的问题，提示有过盈错误，上传INP

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