Results from optistruct are the same as the input geometry

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

I am attempting to optimize an imported geometry though I ran into several problems;

 

- The mesh quality was apparently lacking (used the tetra mesh option to mesh create it), so I bypassed this check by using a control card.

 

- Though point loads and contraints have been applied to the mesh, the output is only of a few iterations and too closely resembles the geometry to be called a viable optimization: reducing the upper bound of the optimization constraints does not appear to resolve this...

 

As a side note, I would also like to know if it would be possible to implement moments onto the mesh. I have a general idea but I'm not entirely sure.

 

I will attach supplementary files as soon as I am able.

 

Thanks

 

Edit: I would also like to mention my goal is to minimise compliance with a volumefraction or mass fraction as an optimization constraint.

 

Edit2: Nevermind I solved my own problem.

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2017

    Hi Umar,

     

    Did you try iSO contour on HyperView?

     

    Does it show same contour through out the model?

     

    Can you share the .out file and also model file using file transfer link available in my signature below?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Yes this worked; I updated in the parent post as an edit to reflect this, thanks for your response though!

     

    I now have a new problem in a remesh:

     

    I attempted to create a finer mesh and assign this the properties of the first, though I am now encountering a problem in terms of assigning properties apparently. I went back and performed a card edit on every collector and operation/property, but still nothing. Also checked for duplicates, but I'm not entirely sure this process was done correctly.

     

    Please advise as to how I should proceed, attached is my output transcript and HM file, the transcript also pasted below:

     

    Messages for the job:

     
     *** ERROR # 2372 ***
     No PSOLID properties exist in the bulk data.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20346.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20347.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20348.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20349.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20350.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20351.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20352.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20353.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20354.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20355.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20356.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20357.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20358.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20359.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20360.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20361.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20362.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20363.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20364.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20365.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20366.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20367.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20368.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20369.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20370.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20371.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20372.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20373.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20374.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20375.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20376.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20377.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20378.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20379.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20380.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20381.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20382.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20383.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20384.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20385.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20386.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20387.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20388.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20389.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20390.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20391.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20392.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20393.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20394.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20395.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20396.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20397.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20398.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20399.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20400.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20401.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20402.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20403.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20404.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20405.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20406.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20407.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20408.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20409.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20410.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20411.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20412.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20413.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20414.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20415.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20416.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20417.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20418.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20419.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20420.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20421.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20422.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20423.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20424.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20425.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20426.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20427.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20428.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20429.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20430.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20431.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20432.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20433.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20434.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20435.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20436.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20437.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20438.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20439.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20440.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20441.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20442.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20443.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20444.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20445.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20446.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20447.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20448.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20449.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20450.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20451.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20452.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20453.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20454.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20455.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20456.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20457.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20458.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20459.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20460.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20461.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20462.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20463.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20464.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20465.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20466.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20467.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20468.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20469.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20470.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20471.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20472.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20473.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20474.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20475.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20476.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20477.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20478.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20479.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20480.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20481.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20482.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20483.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20484.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20485.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20486.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20487.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20488.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20489.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20490.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20491.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20492.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20493.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20494.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20495.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20496.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20497.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20498.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20499.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20500.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20501.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20502.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20503.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20504.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20505.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20506.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20507.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20508.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20509.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20510.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20511.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20512.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20513.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20514.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20515.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20516.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20517.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20518.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20519.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20520.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20521.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20522.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20523.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20524.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20525.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20526.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20527.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20528.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20529.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20530.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20531.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20532.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20533.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20534.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20535.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20536.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20537.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20538.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20539.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20540.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20541.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20542.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20543.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20544.
     *** ERROR 14: Missing property #    1 referenced by  CTETRA # 20545.
     
     ****************
     Too many error messages. Aborting run.
     Current limit is 10000. Use 'MSGLMT' control card to change this value.
      

     

     

     

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Can you check if Property ID 1 is PSOLID?

     

    If it is not, please update the property and try again. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    All relevant settings where this option is available I have selected PSOLID, double checked this just now too.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Resolved the problem: I made a simple error in terms of constraints; the constraints I specified ('surface' type) were mapped to 'non-design' material. I simply removed this surface and instead mapped the constraints as nodes along the mesh for the design surface.

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