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Brian DO

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  1. Brian DO liked a post in a topic by Simon Križnik in Linear Buckling Analysis   
    Hi,
     
    While nonlinear buckling could be done in Optistruct, it is very is likely the implicit solver will experience convergence difficulties resulting in long run times or even fail due to nonconvergence. Alternatively use Radioss integration to solve your model with the explicit method in Optistruct.
     
    Therefore I suggest using Radioss explicit solver instead following this procedure:
    1.perform modal analysis in Optistruct
    2.in postprocessing create a derived load case>linear superposition>use small scale factor (1e-2 to 1e-3)
    3.export the deformed shaped.
    4. import the deformed shape into Hypermesh Radioss user profile and set up non-linear buckling analysis.
     
    By using the deformed shape obtained from the modal analysis the structure will have geometry imperfection triggering a buckling pattern consistent with modal and linear buckling analysis.
     
    Nonlinear buckling analysis is recommended to be performed within Radioss. Post buckling can be solved using nonlinear geometry (Implicit) loadcase. Use any of the Arc-Length methods to solve post-buckling analysis.
    Buckling.pdf1.46 MB · 130 downloads
    2_2_snap_roof___implicit.pdf663.71 kB · 105 downloads
     
    There are two tutorials and one example on NL buckling: 
    RD-T: 3030 Buckling of a Tube Using Half Tube Mesh (Hypercrash) RD-T: 3530 Buckling of a Tube Using Half Tube Mesh (Hypermesh) RD-E: 0300 S-Beam Crash RD-T_ 3030 Buckling of a Tube Using Half Tube Mesh.pdfUnavailable RD-T_ 3530 Buckling of a Tube Using Half Tube Mesh.pdfUnavailable RD-E_ 0300 S-Beam Crash.pdfUnavailable
  2. Brian DO liked a post in a topic by Junta in IS Cast 2019.2 Meshing Failed (Solved)   
    Hi Sourav Das,
    Appreciated for your support. It worked.
    I need to uncheck "Run at model Location" in Preference >> Inspire >> run options
    Thank you very much!
  3. Brian DO liked a post in a topic by Sourav Das in IS Cast 2019.2 Meshing Failed (Solved)   
    Hi Duc_Hoang,
     
    In preference you selected to run at the model location it seems, you can also do one thing, you can change the option in run option in inspire and also in run option in Inspire cast in preference, (try this it will work) if possible send the file  if it doesn't work, we shall check. 
     
    With Kind Regards,
     
    Sourav Das
    | HyperWorks Specialist-FEA| Academic Program |
    sourav.das@altair.com | www.altairhyperworks.com
    Altair | Innovation Intelligence®
    Secure file dropbox https://ftam1.altair.com/filedrop/sourav.das@altair.com
     


  4. Brian DO liked a post in a topic by Q.Nguyen-Dai in Software rendering mode in HyperMesh Desktop   
    I don't think you can found this option in Hypermesh.
    In general, when you have some issues with graphic card or graphic driver, the only possibility is .... replace your hardware :-)
  5. Brian DO liked a post in a topic by tinh in How to use HyperWorks Automation Toolkit   
    Hi,

    HWAT has many base functions and also ultility functions that useful for you.

    read the help in ..\help\altair_tools\tools.html

    i think it is easy. so if you feel tough at any point please post here, i cannot describe all because it is a huge library

  6. Brian DO liked a post in a topic by tinh in How to Learn Tcl scripting   
    It is a very easy to learn language
    Read it manual and take some examples, you will see
    https://www.tcl.tk/man/
  7. Brian DO liked a post in a topic by tinh in Where are these nodes from?   
    Hi,
    Try entering panel Analysis>preserve node
    then click clear all preserved
  8. Brian DO liked a post in a topic by tinh in find cog of a hole.   
    hi
    from hm14 you can select nodes on edge in one click
    so just use hm_getbestcirclecenter to find cog of the nodes
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