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Found 39 results

  1. Dear all, In my company, we are using Nastran and Patran to do frequency response simulation and random response simulation, but I see that Optistruct could do the same, did any one have a comparison between the two software? I mean whether the response stress/acc/dis is same in a more complex situation. Looking forward to your answers. Thanks!
  2. Hello all, I need to perform a Thermal Analysis on a Satellite. In order to do it so simulating the space thermal environment is needed. My question is: How can I simulate the space thermal environment in hypermesh with Optistruct to take into account the specific orbit and time of the year. Thanks in advance, Best Regards
  3. Hi can anybody explain me how to do Torque stiffness and bending stiffness analysis in a BIW also please send the NASTRAN setup file if possible which will be helpful Thanks
  4. I have exported my model to .dat file and after opening the .dat file in text file, i am getting the lines as displayed in the attached image. it is like, $HMMOVE 45 $ 11538THRU 11572 $HMMOVE 46 $ 11746THRU 11792 $HMMOVE 47 $ 11875THRU 11895 $HMMOVE 48 $ 12050THRU 12091 $HMMOVE 49 $ 12182THRU 12205 $HMMOVE 50 $ 12293THRU 12317 $HMMOVE 51 $ 12472THRU 12511 i am not aware of this type of lines. Anyone please explain what these are and if its an error, how to avoid those.. Thanks, Prabhu P
  5. Hey everyone, I have a .bdf file (the solver deck file required for NASTRAN). Hypermesh creates this file by the export process. My work requires that I edit the .bdf text, but also use the graphical features of Hypermesh. I would like to find a way of retaining user-added comments in the .bdf. Let me explain: 1. Create mesh 2. Export as .bdf 3. Comment the .bdf file appropriately -BUT- 4. When I re-import to HM and export, my comments are removed. Is there a way to keep them? Hypermesh will keep comments that are attached to material properties (for example, if I add a comment to a MAT1 card, they will stay with import/export) Thanks for any help!
  6. Hi, I'm struggling with a seemingly basic issue in hypermesh. I'd like to know if there's a way to reverse the direction of a cbush element? That is, interchanging node A <-> node B of the cbush. Actually, the same question applies for any king of 1D element ... Thanks in advance!
  7. Hi.... I have switched from Hypermesh 12.0 to 14.0 but having a problem in exporting the property name in Nastran (Long Format) and opening in ANSA. The names are retained in the standard format but they becomes default when I export the model in the Long Format of Nastran in HM 14.0 and open in ANSA software. I have never faced such problem in 12.0. Kindly suggest the solution. Thanks
  8. Hi all! I performed a random response in Nastran. I would like to plot the apparent frequency for each element of my model. Is Hyperview capable of this? Besides, I was not able to load random analysis results with multiple subcase in the nastran input file. Is this a limitation of Hyperview?
  9. Hi, I have model in Hyperwork and i got problem. In Hyperwork I can get output by solver, i have tried to do this but there is somethings strange happen. The grids parameter in optistruc fem and Nastran dat file are the same but when I apply the load to hyper-view, the values are change?! I don't know why this happen. Here the excel file and show this. Any comment? Best, Mohammad bendingreals4taguchi1.xlsx
  10. Hi, I Stick into a problem. I defined a hyperbeam in this format: standard, Nastran, and box, then I defined Pbeaml in properties and assign this beam section to it. when I run with Optistruct, that error appear: "PBEAML 2663 0 MSCBML0 BOX +" *** ERROR # 1000 *** in the input data: Incorrect data in field # 3. Please help me on this. Cheers.
  11. hi, i wanted to know if, when importing a .bdf model (shells and beams with offset) to hypercrash , the offset is still considered in hypercrash or not) and also if it is possible to show the 1-d element in 3D (showing section). thank you
  12. Hi guys, I am using HM in NX Nastran profile. I am working in Sol 109. I would like to define PARAM W3, but the PARAM W3 is not found in PARAM control cards. So I try to add it in dat file manually. It is not working. Please advise. Thank you in advance.
  13. Recently im working on an assignment. I have exported solver deck from hypermesh and run it in NASTRAN but the NASTRAN is not creating punch file(.pch).Can anybody help me with this issue. It is creating all other files e.g .f06, .f04,.dball,etc. Can i use these files to do post-processing in hypermesh or PATRAN?
  14. Hi, I'm currently experencing a problem with hypermesh in Nastran user profile. I've created an include file with my SETS. This include file has to be in the control section if I wanna use sets in punch files. I managed to locate it there through the 'INCLUDE_CTRL" option in control cards panel, but I can't delete the one created by default in the bulk section in hypermesh. How can I do? Thanks.
  15. How to define a contact between two surface of shell elements in Nastran profile? Which card image i should use? I created slave and master elements using contact surface collector . Am doing linear static and normal mode analysis.
  16. Hello, I'm modelling a complex structure in Hypermesh with Nastran profile and I need to connect two components. One is a tube meshed with pshell elements while the other is a solid meshed with psolid. The tube is perpendicular to the solid surface but I cannot have the same mesh for various reasons. In Abaqus I would use a tie constraint between the edge of the tube and the surface of the solid but I can't understand how to do so with Nastran and Hypermesh. I tried to use the cards BSURF, BCONNECT AND BCTABLE but I'm not able to figure out how they works. Any suggestions would be highly appreciated. Thank you! Stefano
  17. I ran for SOL111 single subcase, in nastran 2013, output file <.pch>. I tried importing in hypergraph but got following error. " Error: Blocks present in the file <filename.pch> are not currently supported.!". Please help.
  18. Hi every one, I have the student version of HW and I can't import a .nas file in HyperCrash. How can I convert it in a .rad file please ? Happy holidays !
  19. Hi, I would like to know if it is possible to export an include file in "Nastran long format". I know I can export the entire model in long format by "Export-->Solver Deck-->template-->long format" but when I use the option "Export an include" after right click on it always is in "Standard format". Do anyone know if it is possible to do it in long format? Thank you in advance. Regards
  20. How to perform simulation (Nastran) on a system by applying a sinusoidal load of 0.1g which swept from 10-50 Hz which varies at rate of 1Hz/min ??? How to use the Time domain in solver deck? In Modal Frequency Response i don't use varying rate (1 Hz/min) . So please let me know how to apply the time here.....!!!
  21. I would like to create several local coordinate systems on a curved surface that has nodes on it at the center of boltholes. I have been able to setup 3 vectors at each node but cannot figure out how to create the systems using these vectors. Obviously, I am a beginner. Can someone provide guidance? Thank you!
  22. Hi, i'm using hypermesh as pre-processor and performing some FEAs with Nastran. i'm looking for a way to create in my hypermesh model the new BCTABLE e BCCONECT that are used starting from nastran 2013.1. In other words, I need to put in Hypermesh something like this: $$------------------------------------------------------------------------------$BCBODY1,201,,3D,DEFORM,101BCPROP,101,4BCBODY1,202,,3D,DEFORM,102BCPROP,102,9BCBODY1,203,,3D,DEFORM,103BCPROP,103,90$.......$.......$.......$.......$.......$.......$.......$.......$.......$.......$.......BCTABL1 0 2001 2002BCONECT 2001 3001 203 201bconect 2002 3002 203 202bconprg 3001 IGLUE 3 ICOORD 1 ERROR 0.005 COPTS 61 COPTM 61bconprg 3002 IGLUE 3 ICOORD 1 ERROR 0.007 COPTS 61 COPTM 61BCTABL1 1 2001 2002BCPARA,0,NLGLUE,0$$------------------------------------------------------------------------------$since i'm a little bit tired of use the old-fashion-way to insert this on bdf file.
  23. Hello. I would like to run a linear static load in optistruct solver, by using strain output from Moldflow analysis. Initial strain is available in following form (Nastran format); " $ OUTPUT PRODUCED BY MOLDFLOW PLASTICS INSIGHT $ $-------2-------3-------4-------5-------6-------7-------8-------9-------0------- STRAIN,1,1,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S1 +S1,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S2 +S2,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S3 +S3,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S4 +S4,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S5 +S5,0.000,0.000,2.931-3,1.352-2,0.000,0.000,0.000,0.000,+S6 +S6,0.000,0.000 STRAIN,1,2,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S1 +S1,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S2 +S2,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S3 +S3,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S4 +S4,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S5 +S5,0.000,0.000,1.060-2,5.582-3,4.536-3,0.000,0.000,0.000,+S6 +S6,0.000,0.000 " Material tipe is MAT8. I can't find a way to write initial strain or stress state to optistruct input. Regards.
  24. Hi all, Is there any option to visualize/display Coordinate system for CBUSH and other 1d elements. Thanks in advance Girish
  25. hello ! I have imported a mesh (.nas) into feko and it seems okay , but when i wanted to save the matrix elements into *.mat file I get an error saying that the mat file couldn't be opened, any suggestions to solve this issue ?! Thank you !
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