Jump to content

jiaru72300

Members
  • Content Count

    25
  • Joined

  • Last visited

Everything posted by jiaru72300

  1. The design zone of your model has not meshed。
  2. Hi, It can be clearly seen from the formula, The error should be negative. Ideally, the error should be at most -15% and better to have -5%. The closer to 0% error the better. Any positive energy error means energy has been created which indicates a model issue. An error of 1 or 2% will be acceptable.
  3. Hi, You can try the MMO (multi-model topology optimization) method.
  4. There are many basic errors in your model. For example: 1、 the mesh quality is too bad 2、 BCS were placed in the EIGRL loadcllector The following attachment is a model that can be calculated. tank200L_correcteted_done.fem
  5. You should to switch the SPC to ASET card The rigids element needs to be switched to rbe2 CONROD_Altair_Dis_ABAQUS.fem
  6. The mats1 card is used in the nonlinear subcase. But the loadstep of your model is “linear static” ,you should change it to "nlstat".
  7. hi @Mrt try to use "node to surface"
  8. Hi @Prakash Pagadala I have already sent the model to you, thanks !
  9. Model description: A set of gears Load:Torque Non-linear analysis conditions (NLSTAT) There have contact between the gears (Slide) Problem Description: The ideal result should be that the largest stress is at the root of the tooth, but the analysis result is that the largest stress is at one point of the tooth surface. This maybe stress concentration. Is it a model problem? Or, if not, how to solve the stress concentration problem caused by this analysis. When I look at the results at different times, stress is still relatively uniform even at t=0.9, but stress concentration occurs at t=1.0. Is the load equally divided? The following pictures show the stress results On the left is t=0.9. On the right is t=1.0.
  10. @ Prakash Pagadala Hi, Thank you for your reply. But,I am sorry that the model is confidential.
  11. @ Prakash Pagadala Hi, It really worked, I got the results of the analysis. But, what causes this? softwear bug? thank you very much !
  12. hi @ Prakash Pagadala It does'nt work . The erro still exists.
  13. @ Prakash Pagadala OK, I'll delete“ rforce” to try it. Thanks !
  14. @Prakash Pagadala Thank you for your reply I have update to the 2017.2.2 here is the entire .out file Zhou_m_LG3.out and I have deleted the card “nlout” and “NLmon”
  15. Hi, I'm getting following error from Optistruct. I used the Hyperworks 2017.2 The .out file print "Nonlinear solution has converged" ,but with this erro and no last h3d results. how can I resolve this issue? Thanks,
  16. 你的模型有以下几个问题: 1、最大的问题:模型中 网格有好几个地方是没有连接起来的。 检查自由边可以检查到该问题。 2、你定义的接触有问题,接触法向 与单元的法向 没有匹配起来。 建议将 壳单元 直接定义成接触体 3、你最好先把接触问题 调整好了之后,你在设置其他的非线性问题。 -------------- Your model has following problems: 1, the largest problem: Free edges.Mesh of several places were not connected in the model. Check the "free edges" to check this problem. 2, the contact problem: the normal of the contactsur did not match the element,and the normal in the interface(group) were reversed. It is recommended to define the "elem entity" directly. 3, you'd better solve the contact problem firstly,and then, set other non-linear problems.
  17. Hi , Is this problem solved? I have also encountered the problem. Could you please share the solution.
  18. Two rigids element can't use the same dependent nodes.
  19. 你的模型有以下几个问题: 1、 Cellsurface的属性与面法向组合有问题,该面的属性为 bottom,但是法向确是向上的。正确的组合应该是:top,法向向上,或者bottom 法向向下。 2、 Cellsurface 与 Busbartang 接触对[cELL TO TANG_NEW]的设置问题: 1) 法向问题:你用的是 接触面 设置的接触,那么两者的法向的方向应该是相对的; 2) DisCret问题:N2S,还是 S2S 3) SrchDis的问题:无论你是 N2S还是S2S,该选项搜索的是节点到主面的距离,故你的设置中该值偏小,只需要稍微改大即可。 Your model has the following problems: 1. There has problem between The Properties of the Cellsurface and the normal of Cellsurface, the ZOFFS of Cellsurface properties is Bottom, But normal is pointing up. The correct combination should be: top, normal pointing up, or bottom, normal pointing down. 2. The contact Pair Cellsurface and Busbartang [cELL TO TANG_NEW] settings: 1) Contactsurfs normal problem: you use contactsurfs for the contact, then the direction of the contactsurfs (Master and slave) normal should be relative; 2) DisCret problem: theN2S, or S2S ? 3) SrchDis problem: whether you're N2S is S2S, the search distance all is between node to the Master Sur. so you set the value small, only slightly modified.
  20. Hi, I calculated the model. use the NLSTAT. The result shows that the model can normally converge, But the contact has problems, I recommend using Pcont card to control. M14 momen 30%_Nol.out
  21. I found the cause of the problem: because the model has contact, but I'm not using card PcontX, so the error always occurs. Workaround: open the card PcontX. And if your contact has the initial penetration, you need to change the INACTI parameter.
  22. ************************************************************************ FINITE ELEMENT MODEL DATA INFORMATION : --------------------------------------- Total # of Grids (Structural) : 8053 Total # of Elements : 5128 Total # of Rigid Elements : 10 Total # of Rigid Element Constraints : 876 Total # of Degrees of Freedom : 25002 Total # of Non-zero Stiffness Terms : 771777 Element Type Information ------------------------ CHEXA Elements : 4750 CPENTA Elements : 378 Load and Boundary Information ----------------------------- FORCE Sets : 1 SPC Sets : 1 NLOAD Sets : 1 Material and Property Information --------------------------------- PSOLID Cards : 3 PSOLIDX Cards : 3 MAT1 Cards : 2 MATX02 Cards : 1 MATX36 Cards : 1 ************************************************************************ ************************************************************************ OPTIMIZATION PROBLEM PARAMETERS : --------------------------------- NO DESIGN MATERIAL OR DESIGN VARIABLES FOUND : ANALYSIS ONLY ------------------------ NLGEOM Subcase Summary : ------------------------ ---------- --------- ------ -------- ------- -------- ---------- -------- Subcase ID NLPARM ID SPC ID NLOAD ID LOAD ID XHIST ID SOLVTYP ID RWALL ID 1 4 1 6 ---------- --------- ------ -------- ------- -------- ---------- -------- Run Type : Analysis Only Scratch file directory : ./ Free space: 338.802 GB Number of CPU processors : 1 ************************************************************************ ************************************************************************ MEMORY ESTIMATION INFORMATION : ------------------------------- Solver Type is: Sparse-Matrix Solver Direct Method Current Memory (RAM) : 400 MB In addition a ramdisk area was allocated in memory : 200 MB Estimated Minimum Memory (RAM) for Out of Core Solution : 17 MB Recommended Memory (RAM) for Out of Core Solution : 19 MB Recommended Memory (RAM) for In-Core Solution : 26 MB DISK SPACE ESTIMATION INFORMATION : ----------------------------------- Estimated Disk Space for Output Data Files : 4 MB Estimated Scratch Disk Space for In-Core Solution : 9 MB Estimated Scratch Disk Space for Out of Core Solution : 9 MB ************************************************************************ BEGINNING ANALYSIS SOLUTION .... ************************************************************************ ANALYSIS RESULTS : ------------------ ITERATION 0 Element # 4002, element type HEXA. WARNING - Outside of recommended range: Edge Angle = 71.653 upper limit = 60.000 Element # 4003, element type HEXA. WARNING - Outside of recommended range: Edge Angle = 71.653 upper limit = 60.000 Element # 4568, element type HEXA. WARNING - Outside of recommended range: Edge Angle = 73.493 upper limit = 60.000 NOTE : other similar error/warning messages were suppressed, use PARAM,CHECKEL,FULL to obtain full report Element Quality Check Summary ----------------------------- Total # of elements that exceeded recommended range (warning) = 8 Recommended range violations: ------------------------------------------------------------------------------ Element Property # of Recommended Range Max. Viol. Elem. Viol. Lower Upper Value type No. ------- ------------------- -------- --------- --------- --------- --- ------- HEXA Edge Angle 8 -- 60.00 73.49 U 4568 (Scratch disk space usage for starting iteration = 9 MB) NLGEOM subcase 1, starter running ... *** WARNING # 4101 Running RADIOSS starter, 0 ERRORs and 4 WARNINGs have been detected. They are listed below. STARTER WARNING: WARNING ID : 343 ** WARNING : INITIAL PENETRATIONS IN INTERFACE DESCRIPTION : -- INTERFACE ID : 2 -- INTERFACE TYPE : INTER_TYPE7_2 THERE ARE 40 INITIAL PENETRATIONS ( CONCERNING 20 NODES ) STARTER WARNING: WARNING ID : 343 ** WARNING : INITIAL PENETRATIONS IN INTERFACE DESCRIPTION : -- INTERFACE ID : 5 -- INTERFACE TYPE : INTER_TYPE7_5 THERE ARE 40 INITIAL PENETRATIONS ( CONCERNING 40 NODES ) STARTER WARNING: WARNING ID : 343 ** WARNING : INITIAL PENETRATIONS IN INTERFACE DESCRIPTION : -- INTERFACE ID : 6 -- INTERFACE TYPE : INTER_TYPE7_6 THERE ARE 721 INITIAL PENETRATIONS ( CONCERNING 274 NODES ) STARTER WARNING: WARNING ID : 343 ** WARNING : INITIAL PENETRATIONS IN INTERFACE DESCRIPTION : -- INTERFACE ID : 7 -- INTERFACE TYPE : INTER_TYPE7_7 THERE ARE 721 INITIAL PENETRATIONS ( CONCERNING 508 NODES ) NLGEOM subcase 1, starter finished NLGEOM subcase 1, engine running ... *** ERROR # 4079 *** Non-convergent nonlinear iterations for subcase 1. *** ERROR # 4002 *** Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected. They are listed below. ENGINE ERROR: ** ERROR : RADIOSS IMPLICIT STOPPED DUE TO TIMESTEP LIMIT ** ISTOP=-2 NLGEOM subcase 1, engine finished (Running in-core solution) Volume = 5.12207E+005 Mass = 3.38515E-003 ************************************************************************ ANALYSIS COMPLETED. *** SOME ERRORS WERE REPORTED DURING THE RUN, *** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID. ************************************************************************ RESOURCE USAGE INFORMATION -------------------------- MAXIMUM MEMORY USED 400 MB IN ADDITION 200 MB RAMDISK AREA WAS ALLOCATED IN MEMORY MAXIMUM DISK SPACE USED 1 MB ************************************************************************ ************************************************************************ COMPUTE TIME INFORMATION ------------------------ EXECUTION STARTED Tue Jan 26 14:08:29 2016 EXECUTION COMPLETED Tue Jan 26 14:11:28 2016 ELAPSED TIME 00:02:58 CPU TIME 00:00:00 ************************************************************************ *** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED. ***** END OF REPORT ***** For Useful OptiStruct Tips and Tricks, go to the URL: http://www.altairhyperworks.com/tips.aspx PROGRAM STOPPED DUE TO ERROR. ************************************************************************ A fatal error has occurred during computations: *** ERROR # 4079 *** Non-convergent nonlinear iterations for subcase 1. ANALYSIS COMPLETED. *** SOME ERRORS WERE REPORTED DURING THE RUN, *** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID. *** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED. ************************************************************************
×
×
  • Create New...