nastran计算求助
在结构动态仿真中，同一模型，同一激励源，在计算响应时一个算了1000步，一个算了4000步，为什么1000步时能计算，4000步时就没法计算了，f06文件的部分信息中，有个一warning“USER WARNING MESSAGE 7697 (GKAM1A)
ONE OR MORE MODAL DAMPING VALUES FOR STRUCTURE MODES ARE EITHER NEGATIVE OR HAVE RESULTED FROM EXTRAPOLATION OF THE TABDMP1”这应该是说刚体模态阻尼和结构模态阻尼。
还有个 fatal message
*** USER FATAL MESSAGE 1012 (GALLOC)
DBSET DBALL IS FULL AND NEEDS TO BE EXPANDED.
USER ACTION: SEE THE MSC.NASTRAN INSTALLATION AND OPERATIONS GUIDE OR
TAN 4893 ON THE MSC WEB SITE FOR METHODS TO MAKE LARGER DATABASES.
BIOMSG: ERROR 4276 HAS OCCURRED IN ROUTINE GALLOC, FILE INDEX = 0.
STATUS = 0
********* NASTRAN FILE TABLE *********
我觉得应该是这个fatal message的原因，可是没看懂，说什么dball文件，哪位大虾帮忙给看下呢，指点迷津啊，鄙人刚接触有限元，不懂啊。
下面是f06里的部分信息
0
1 THIS IS A DEFAULT SUBCASE. JULY 1, 2010MSC.NASTRAN6/19/08 PAGE 836
0 SUBCASE 85
*** USER WARNING MESSAGE 7697 (GKAM1A)
ONE OR MORE MODAL DAMPING VALUES FOR STRUCTURE MODES ARE EITHER NEGATIVE OR HAVE RESULTED FROM EXTRAPOLATION OF THE
TABDMP1 1 TABLE DATA AS SHOWN BELOW:
CYCLIC FREQUENCY =1.348780E+04MODAL DAMPING VALUE =1.000000E-01(BY EXTRAPOLATION BEYOND THE RIGHT END OF THE TABLE)
1 THIS IS A DEFAULT SUBCASE. JULY 1, 2010MSC.NASTRAN6/19/08 PAGE 837
0 SUBCASE 85
*** USER INFORMATION MESSAGE 7559 (TRLGP)
THIS TRANSIENT RESPONSE ANALYSIS INVOLVES THE FOLLOWING TYPES OF EXCITATION --
* APPLIED LOADS
*** USER INFORMATION MESSAGE 5222 (TRD1)
UN COUPLED SOLUTION ALGORITHM USED.
*** USER FATAL MESSAGE 1012 (GALLOC)
DBSET DBALL IS FULL AND NEEDS TO BE EXPANDED.
USER ACTION: SEE THE MSC.NASTRAN INSTALLATION AND OPERATIONS GUIDE OR
TAN 4893 ON THE MSC WEB SITE FOR METHODS TO MAKE LARGER DATABASES.
BIOMSG: ERROR 4276 HAS OCCURRED IN ROUTINE GALLOC, FILE INDEX = 0.
STATUS = 0
********* NASTRAN FILE TABLE *********
INDEXLOGNAME STREAM_ID NAME
1SCRATCH 00000001 c:/scratch/armature-sin1.85-4000.T3104_28.SCRATCH
2OBJSCR 00000002 c:/scratch/armature-sin1.85-4000.T3104_28.OBJSCR
3MASTER 00000003 ./armature-sin1.85-4000.MASTER
4DBALL 00000004 ./armature-sin1.85-4000.DBALL
5SCR300 00000005 c:/scratch/armature-sin1.85-4000.T3104_28.SCR300
6MASTERA FFFFFFFA c:/msc.software/msc_nastran/msc2008/i386/SSS.MASTERA
7MSCOBJ FFFFFFF9 c:/msc.software/msc_nastran/msc2008/i386/SSS.MSCOBJ
*** SYSTEM FATAL MESSAGE 4276 (GALLOC)
ERROR CODE 4276 PID= 0
*** USER INFORMATION MESSAGE 4276 (GALLOC)
THE DIAG 44 RELATED A NASTRAN DUMP IS SENT TO LOG FILE.
USER ACTION: THIS INFORMATION MAY BE USEFUL TO MSC FOR DEBUGGING YOUR PROBLEM.
PLEASE CONTACT MSC CLIENT SUPPORT.
1 * * * END OF JOB * * *
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 101 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 201 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 102 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 103 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 202 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 203 WAS LEFT OPEN AT PROGRAM TERMINATION.
No Symbolic Replacement variables or values were specified. 版主给点意见，或者有没有已经解决的兄弟姐妹给点意见啊 外行人的意见, 考量将问题转换为更一般性, 或许回答的会比较多! 还有个 fatal message
*** USER FATAL MESSAGE 1012 (GALLOC)
DBSET DBALL IS FULL AND NEEDS TO BE EXPANDED.
USER ACTION: SEE THE MSC.NASTRAN INSTALLATION AND OPERATIONS GUIDE OR
TAN 4893 ON THE MSC WEB SITE FOR METHODS TO MAKE LARGER DATABASES.
BIOMSG: ERROR 4276 HAS OCCURRED IN ROUTINE GALLOC, FILE INDEX = 0.
STATUS = 0
********* NASTRAN FILE TABLE *********
！！！！！！！！！！！！磁盘空间不够吧 已解决。不计算相关节点信息，可节省大量计算空间 1012的msg有一般的解决办法，首先是结果中不要生成dball文件，计算控制中添加“scr=yes”的语句，另外更普遍的解决办法是缩小你的模型，只求解你所关心的物理量，比如应力的计算通常会占用较大的磁盘空间，因此就要考虑是不是要输出。如果1000步可以满足结果输出要求，那就不要4000步。
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