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Recent content by Helrezer

  1. Helrezer

    FE Text For Begginers

    I would recommend a "Finite Element Primer" from NAFEMS. Their web site is www.NAFEMS.org. NAFEMS is a non profit organization that does training, support and benchmarking for the FEA industry. Their books are not aligned to any particular software, and the information is accurate and easy...
  2. Helrezer

    Open I-DEAS parts in NX 7.5 from the TDM using open i-deas

    First, I would recommend that you also post your quesitons to PLM World. You can join for free and they have forums that Siemens people monitor. And I would agree that you can call GTAC directly and they would probably help you. You can use the interoperate command under the File menu to...
  3. Helrezer

    I-DEAS future, if any

    DISCLAIMER: This is NOT an official endorsement nor a claim that this is the policy position of our company. This is my opinion only! Ideas12 is a very old version of the software. If they had used the same numbering scheme (they keep changing it), the current version would be Ideas16. I know...
  4. Helrezer

    simulation post processing

    Dear Prokospit, The date check is the issue. It was found April 1 several years ago, but any version before NX7, has the issue. I hope you can download the patch. I do not know how you can copy an installation of NX Nastran. Marilyn Tomlin
  5. Helrezer

    Queue up simulations in NX Advanced Simulation for NX Nastran solver

    Dear Sandcor, I am not sure but I think you need to have the path name and the file name on the same line. I will check and see if this is the case. Marilyn Tomlin
  6. Helrezer

    Difference & application of constrain modes , attachment modes, normal/real modes

    Attachement and constraint modes are calculated when doing a normal modes analysis with the newer calculation methods. The attachement mode is used in response simulation (i.e. random vibration analysis) for the base excitation location. The constraint mode is used in response simulation to...
  7. Helrezer

    simulation post processing

    There is no results file. I do not know why. But if you look in the directory where you SIM file is, you should see a file with an f06 extension. That file should have all the warnings and errors listed. NX5 and NXN5 had a different license scheme, so that may be the issue. I would suggest...
  8. Helrezer

    New to be a structural engineer

    Just a note, that NAFEMS is offering an on-line Intro to FEA with a 30% discount if you sign up before Nov 30. I am sure this would be a useful class. Marilyn
  9. Helrezer

    FEA in Unigraphics NX7.5 - doubt regarding solver type

    Thanks, I am glad to help!
  10. Helrezer

    Press fit with glued contact in NX Nastran

    Dear Piet, I have done this type of analysis several times and it works. Make sure that you have a negative search distance that is larger then you interface. (I think I forogt that in the last email.) But it should work. Glue does not move the surfaces. Actually all glue and contact have...
  11. Helrezer

    FEA in Unigraphics NX7.5 - doubt regarding solver type

    Dear Rhyder The C in front of all elements stands for Connectivity. Nastran names elements C+shape. And Model solution was easier in terms of understanding the element types. This language is left over from the early Nastran days. The Solution ### is the solution sequence that is called...
  12. Helrezer

    Contact in Ideas

    In February, KAR asked about contact in Response Dynamics. Contact can only be used as stress stiffening for Response Dyamanics. That is becasue Response Dynamics is based on modes, and modes are linear by definition. The stress stiffening using contact is available in NX and NX Nastran, but...
  13. Helrezer

    Mesh Quality In Ideas

    In April, David asked about mesh quality in Ideas. I do not know any relationshiip between what Patran has and what Ideas has. Ideas recommended 0.3 or above for stretch and distortion. These values were based on the normalization of the Jacobian. They were for the Model Solution elements...
  14. Helrezer

    Associative (polygon) faces in Adv. Simulation

    This behavior in versions prior to NX8.5 was due to the way that polygon bodies were updated. In NX8.5, the update process was modified so that only modified faces get changed. This improves the update process and helps with the meshing updates. I have not checked for face IDs since I do not...
  15. Helrezer

    I-DEAS future, if any

    I have to be honest, I don't know. I rarely touch the history tree, because there are other ways to accomplish the same thing. With Synchronous Technology, you can modify any part (including STEP imported files) without a history tree. However, to create a part from a feature on the histroy...
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