Sensibity optimization: Found value of force for a define displacement

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

Hi all,

 

     As i wrote on the title, i would like optistruct find me the value of the force for a certain displacement.

For example, I a have a cantilever beam (let's says: 3D solid, hexa) and the maximum deflection I would like is:10mm. I would like to make a optimization analysis (i think its a size optimisation)  which optistruct found the force from a range (says: [0N to 1000N]) corresponding to 10 mm of deflection.

     Is it the right type of optimization ( SIZE one)  if yes could u tel me how to make that ? i will be really apreciate

I set up it like that:

 

  • Objectif: 'find value of force corresponding to 10mm of displacement'
  • Constraint: u=10mm
  • design variable: Force range from [0N to 1000N]

 

  Thanks by advance,

 

        Kodebar ^_^/emoticons/default_happy.png' srcset='/emoticons/happy@2x.png 2x' title='^_^' width='20'>

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2016
    Altair Forum User said:

         Is it the right type of optimization ( SIZE one)  if yes could u tel me how to make that ? i will be really apreciate

    Hi Kodebar,

     

    When you are using solid elements, Size may not be the right type of optimization. Instead use shell elements and use Size.

     

    here is a forum post which talks about calculating forces when the deformation is known:

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi Prakash,

     

        First thanks you for haved taking time to answer me!  I really, really apreciate!

        I went to your link on the forum, but there is no explaination, and the link in this topic are dead ...We cannot click on the link , and see something about the problem explain....

     

        However, i make some test since the first post, naturally u were right we can't extract U=f(F) with 'SIZE' method ^_^.

     

         So, what i ve done is to create multiple loadcollector (for exemple : load collector N°1: Force=5N, load collector N°2: Force=10N, load collector N°3: Force=15N, .....) and post process the results on displacements with hyper view. I created subcase ( CNTNLSUB card).  This method works but i think Hypermesh can do better maybe using hyperstudy ?

     

         Have u got an idea to make this kind of study: populate automatically the effort on predefined range ( for exemple [5 N to 15N by step of 1N]? Because my methode could be relative cost time depended if i have to populate 50 loads collectors !!

     

        In additionnal, could u explain me how to create a graph with X axis the effort 'F' (corresponding to subcase in my methode) and on Y axis the maximum  displacement (simple to call this result in hyperview or hypergraph)? I didn't found how to insert 'subcase effort'  for the X axis

     

        Thanks you, :rolleyes:/emoticons/default_rolleyes.gif' title=':rolleyes:'>

     

        Kodebar

     

          

     

     

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