CPU performance

Punith
Punith Altair Community Member
edited October 2020 in Community Q&A

Hello,

I have version 14 and when I run a simulation I see that only 50% of my CPU performance is utilised. I have 32 core processor and I use all of them and when it reaches 50% it is making a huge noise in the CPU. Usually this should not be the case, it has to go above 90% performance. I also attached a screen shot please look to that.

 

 

FINITE ELEMENT MODEL DATA INFORMATION :
---------------------------------------
  Total # of Grids (Structural)        :   1496252
  Total # of Elements Excluding Contact:   1301034
  Total # of N2S Contact Elements      :     17830 (internally created CGAPG)
  Total # of Rigid Elements            :         1
  Total # of Rigid Element Constraints :      1080
  Total # of Local Coordinate Systems  :         2
  Total # of Degrees of Freedom        :   4526524
  (Structural)
  Total # of Non-zero Stiffness Terms  : 172743778
  Total # of Pretension sections       :        10
 

<?xml version="1.0" encoding="UTF-8"?>Unbenannt.JPG

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2016

    Tell us how you run your simulation? CLI? GUI? parameters?

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited April 2016

    Also, looks like a larger model relatively, 

    You can use run options, like -ncpu in OptiStruct to choose the number of cores to be utilised for the solution etc. 

    see help for all the run options for your solver,

  • Punith
    Punith Altair Community Member
    edited April 2016

    Hi Rahul & DAI,

    thank you for the reply. I already used the commands like -nproc 32 , -i64slv. It didnt help me.

     

    Regards,

    Punith Guptha

     

     

  • Punith
    Punith Altair Community Member
    edited April 2016

    Hi,

    can you also please tell me how does a hexahedral element interpolates the value. Does it interpolate at the center of the element?. Because I see the change in the result when I increase the number of layers in the thickness direction. Secondly, can you please tell me what is the typical aspect ratio that can be used for good results. I know that best is 1, but what is the max allowable aspect ratio?

     

    Regards,

    Punith Guptha

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited April 2016

    You can refer to the free ebook, practical aspects of finite element simulation, download it from altairuniversity.com 

  • Punith
    Punith Altair Community Member
    edited May 2016

    Hi Rahul,

    thank you for the reply. I already have that ebook. I could not find any details about where exactly a hexahedral element interpolates the value? Is it at the center?. Please let me know the answer.

     

    Thank you

    Punith Guptha

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited May 2016

    Hi,

     

    For stresses Optistruct gives Element stresses for shell and solid elements are output at the element center only.See attached screenshot.

     

    Regards

    Rahul Rajan | Hyperworks Specialist

    www.altairhyperworks.com|rahul.rajan@altair.com

    Secure file dropbox : https://ftam1.altair.com/filedrop/rahul.rajan@altair.com

     

    Altair | Innovation Intelligence®

     

    <?xml version="1.0" encoding="UTF-8"?>Center.JPG

  • Punith
    Punith Altair Community Member
    edited May 2016

    Hi Rahul,

    thank you so much. It helped me a lot.

    Regards

    Punith Guptha

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited May 2016

    Thanks for the update.

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