How to decide optimisation objectives and element density threshold

Tom Southall
Tom Southall Altair Community Member
edited October 1 in Community Q&A

I’m trying to optimise the geometry of my part for a project I’m working on. I would like to minimise the compliance and the mass of my part as much as possible given a stress limit. So I was thinking of making the objective of the optimisation to limit compliance x mass, however I’m not sure how to do this. Could someone advise how I could?

For now I’ve just been minimising the compliance and setting a target mass fraction. This has worked to produce a result but when I look at the result in hyper view I’m unsure what element density threshold I need to use to create a viable solution. If I put it too high then the stresses will be higher than allowed but if I set it too low then the weight will be higher than necessary. Could someone advise how I should decide which element density threshold I should use?

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Best Answer

  • Rajashri_Saha
    Rajashri_Saha
    Altair Employee
    edited October 1 Answer ✓

    Usually, we suggest to go with a threshhold value between 0.3 and 0.4. 

    From your problem statement , I suggest you to go with Multi Objective Optimization using Hyperstudy.

    Refer the below link for a white paper on such kind of Optimization.

    fdfffsfsaf (altair.co.kr)

    Thanks

    Rajashri

Answers

  • Rajashri_Saha
    Rajashri_Saha
    Altair Employee
    edited October 1 Answer ✓

    Usually, we suggest to go with a threshhold value between 0.3 and 0.4. 

    From your problem statement , I suggest you to go with Multi Objective Optimization using Hyperstudy.

    Refer the below link for a white paper on such kind of Optimization.

    fdfffsfsaf (altair.co.kr)

    Thanks

    Rajashri

  • Tom Southall
    Tom Southall Altair Community Member
    edited September 5
    Rajashri Saha_20525 said:

    Usually, we suggest to go with a threshhold value between 0.3 and 0.4. 

    From your problem statement , I suggest you to go with Multi Objective Optimization using Hyperstudy.

    Refer the below link for a white paper on such kind of Optimization.

    fdfffsfsaf (altair.co.kr)

    Thanks

    Rajashri

    How do I implement this into my optistruct simulation?
  • Rajashri_Saha
    Rajashri_Saha
    Altair Employee
    edited September 10
    Tom Southall said:

    How do I implement this into my optistruct simulation?

    You need to do this in Hyperstudy.

  • Tom Southall
    Tom Southall Altair Community Member
    edited September 10
    Rajashri Saha_20525 said:

    You need to do this in Hyperstudy.

    I’m fairly new to Altair’s software so I’m not really sure how to do this in Hyperstudy. Do you know of any good guides or tutorials for this.
  • Rajashri_Saha
    Rajashri_Saha
    Altair Employee
    edited September 11
    Tom Southall said:

    I’m fairly new to Altair’s software so I’m not really sure how to do this in Hyperstudy. Do you know of any good guides or tutorials for this.

    If you are Altair customer, then you can create a ticket for this purpose under Hyperstudy as product. Our support team will help you.

     

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