CPU performance

User: "Punith"
Punith
Altair Community Member
Updated by Punith

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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    User: "Altair Forum User"
    Altair Forum User
    Altair Employee
    Updated by Altair Forum User

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

    User: "Rahul_P1"
    Rahul_P1
    Altair Employee
    Updated by Rahul_P1

    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,

    User: "Punith"
    Punith
    Altair Community Member
    OP
    Updated by Punith

    Hi Rahul & DAI,

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

     

    Regards,

    Punith Guptha

     

     

    User: "Punith"
    Punith
    Altair Community Member
    OP
    Updated by Punith

    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

    User: "Rahul_P1"
    Rahul_P1
    Altair Employee
    Updated by Rahul_P1

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

    User: "Punith"
    Punith
    Altair Community Member
    OP
    Updated by Punith

    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

    User: "Rahul Rajan_21763"
    Rahul Rajan_21763
    New Altair Community Member
    Updated by Rahul Rajan_21763

    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

    User: "Punith"
    Punith
    Altair Community Member
    OP
    Updated by Punith

    Hi Rahul,

    thank you so much. It helped me a lot.

    Regards

    Punith Guptha

    User: "Rahul Rajan_21763"
    Rahul Rajan_21763
    New Altair Community Member
    Updated by Rahul Rajan_21763

    Thanks for the update.

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