急求人帮忙Abaqus

会不会是子程序的问题呀，有可能是子程序内部参数之间的传递出现问题，使得分母上出现了0。我也经常出现类似的问题，大部分都是由此引起的

explicit显式分析受的限制很多，你看看单元类型等地方的设置适不适合于 explicit分析。

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
* ***************** *
* * N O T I C E * *
* ***************** *
* *
* *
* Abaqus Version 6.7-EF1 *
* *
* BUILD ID: 2007_11_19-09.43.18 80266 *
* *
* *
* Please make sure you are using version 6.7 Extended *
* Functionality manuals plus the notes accompanying *
* this release. *
* *
* *
* *
* *
* *
* This program may not be used for commercial purposes *
* without payment of a commercial fee. *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
PROCESSING PART, INSTANCE, AND ASSEMBLY INFORMATION
*******************************************************
END PROCESSING PART, INSTANCE, AND ASSEMBLY INFORMATION
***********************************************************
OPTIONS BEING PROCESSED
***************************
*Heading
*Node
*Element, type=S4
*Nset, nset=ASSEMBLY_PART-2-1__PICKEDSET20
*Elset, elset=ASSEMBLY_PART-2-1__PICKEDSET20
*Nset, nset=ASSEMBLY__PICKEDSET4
*Elset, elset=ASSEMBLY__PICKEDSET4
*material, name=MATERIAL-USER
*damping, alpha=20
*density
*depvar
*usermaterial, constants=3
*shellsection, elset=ASSEMBLY_PART-2-1__PICKEDSET20, material=MATERIAL-USER, controls=EC-1
*sectioncontrols, name=EC-1, secondorderaccuracy=YES
*shellsection, elset=ASSEMBLY_PART-2-1__PICKEDSET20, material=MATERIAL-USER, controls=EC-1
*transverseshearstiffness
*output, field
*output, history, variable=PRESELECT
*elementoutput, directions=YES, variable=PRESELECT
*output, field
*output, history, variable=PRESELECT
*Step, name=Step-1
*Step, name=Step-1
*dynamic, explicit
*dload
***NOTE: ALL ELEMENTS THAT HAVE MASS ARE COLLECTED IN ELEMENT SET
_Whole_Model_Gravity_Elset FOR APPLICATION OF GRAVITY LOAD.
*output, field
*elementoutput, directions=YES, variable=PRESELECT
***WARNING: ELEMENT TYPE S4 HAS NO OUTPUT AT SECTION POINT 20. SECTION POINT
REMOVED
*output, history, variable=PRESELECT
*endstep
*boundary
*Step, name=Step-1
*dynamic, explicit
*output, field
*nodeoutput, variable=PRESELECT
*output, history, variable=PRESELECT
*endstep
P R O B L E M S I Z E
NUMBER OF ELEMENTS IS 20
NUMBER OF NODES IS 42
NUMBER OF NODES DEFINED BY THE USER 42
TOTAL NUMBER OF VARIABLES IN THE MODEL 252
(DEGREES OF FREEDOM PLUS ANY LAGRANGE MULTIPLIER VARIABLES)
END OF USER INPUT PROCESSING
JOB TIME SUMMARY
USER TIME (SEC) = 0.10000
SYSTEM TIME (SEC) = 0.10000
TOTAL CPU TIME (SEC) = 0.20000
WALLCLOCK TIME (SEC) = 0

具体错误不是谁都会遇到过的，建议你将 .dat, .msg的信息贴上或咨询一下Abaqus代表处的过程师，如果需要他们的联系方式，发邮件到我的邮箱，我给你发，这里不便公布别人的信息。CAE_CAD@126.com