Defining center of gravity as a constraint

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello,

 

I am working on an optimization problem of a blade. One of my constraints will be centre of gravity. I would like to keep the cog at 1/4 of the chord. I am having trouble in understanding how to define the upper and lower limits of cg. Should they be the coordinates? If so on whicj plane and how can I define the reference point to find out what the coordinates are? 

 

Thank you,

 

Muge 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Muge,

     

    Yes. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Prakash,

     

    How can I define a reference point to determine the coordinates in HyperMesh? 

     

    Thanks,

     

    Muge

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Muge,

     

    Not sure what do you mean by reference point.. Could you please explain. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hello Prakash,

     

    Since you said the C.G location will be based on coordinates (on x,y,z planes), I was wondering if I should select a 0,0,0 point as reference on the geometry to identify C.G coordinates based on that? Or, is there a tool that does this automatically? 

     

    Thanks,

     

    Muge

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2017

    Hi Muge,

     

    CG will be calculated. All you have to do is to provide the upper and lower bounds. 

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