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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 


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  1. How to apply force over time in different level

    Hi @Prakash Pagadala, Thanks, I did. Thanks.
  2. How to apply force over time in different level

    Thanks @Prakash Pagadala but I am not familiar with transient in Optistruc. Is there any Tutorial for that?
  3. Hi, I want to apply force over 5 min in each min apply 1/5 of this, I mean I want to apply 1/5 F in over first min. , 2/5F from second min to 3rd min and ..... I dont know how to do this?! Best, Mohammad
  4. Hi, I want to add temp point on my model and do analysis and then in Nastran output or fem output I can read the analysis (displacement or stress of that point), i mean in output the temp node be like a grid point or sth that analysis performed for that too. Best, Mohammad
  5. Problem In Optistuc

    I found some of Properties didn't have Material. Thanks so much for your help.
  6. Problem In Optistuc

    Hi, I Stick into a problem. I defined a hyperbeam in this format: standard, Nastran, and box, then I defined Pbeaml in properties and assign this beam section to it. when I run with Optistruct, that error appear: "PBEAML 2663 0 MSCBML0 BOX +" *** ERROR # 1000 *** in the input data: Incorrect data in field # 3. Please help me on this. Cheers.
  7. Hello,

    Sorry i text you again.

    I can't send message to you, therefor i should send in here.

    I stick in problem.

    As I talked erlier i want to do optimization, i have model in Hyperwork and i tried to do this by Msc.Nastran and then change patameters in bdf file read value from bf06 file use these in my code.


    Here is problem, i get output for nastran and use nastran for calculation of linear static and another time i did it by optistruc by linear analysis but there is big diffrence bewteen them.

    I don't know which one is my answer.


    I really thank you for your time,




    1. Prakash Pagadala

      Prakash Pagadala

      Hi Mohammad,


      Can you share the results and also OptiStruct model file just to check if there is anything missing?

    2. mohammad


      Thank you for your response.

      I have also asked this question in link below , and you have commented on this but i have check and the direction are the same.


      Can I have your Email address to send file in private?




    3. Prakash Pagadala

      Prakash Pagadala

      Hi Mohammad,


      Please use the Filedropbox link in my signature below:https://ftam1.altair.com/filedrop/~Ce4god 

  8. Hi, I have model in Hyperwork and i got problem. In Hyperwork I can get output by solver, i have tried to do this but there is somethings strange happen. The grids parameter in optistruc fem and Nastran dat file are the same but when I apply the load to hyper-view, the values are change?! I don't know why this happen. Here the excel file and show this. Any comment? Best, Mohammad bendingreals4taguchi1.xlsx
  9. optimization

    Honestly I am new in Hypermath. This is exactly what i want, i want to read specific nodes displacement and fetch it in function then do calculation in obtain new design variables and update my model and repeat this iterations until find optimum values. But i don't know how to read Optistruc output and how to modify fem file, this is what i want to. Do you have sample or manual for this? I really appreciated for your comment. Best, Mohammad
  10. optimization

    Thank you for your respone. i didn't know anything about Hyperstudy, Thank you, i wanted do this with MINITAB and SPSS. I want to develop an optimization code and apply it for structural optimization, and i should find a way to do this, i stick into problem in Msc.Nastran then I search for other way. you mean by Hypermath, i can not access to data from optistruc i just need to find deflection of nodes and then set new parameters and again find new deflection automatically.
  11. optimization

    Thank you so much for your consideration. Honestly i have model in hyperwork and i wanted to do this by MSc.Nastran and matlab but my model is very complex and also i cant define any node to check the value of that in nastran output. there for i should find a way, i search and i `m going a little through hypermath and i found out that it has optimization function just like matlab. i just wonder that, can i connect hypermath and hyperwork together and use my model as function, then see this just program language to do my project. Thanks, mohammad
  12. optimization

    in Hypermath i can define a function and write code and also it has functions. instated of define a function, i would like to define my model as function. then do optimization.
  13. Hi,

    Sorry i write in here, but i wrote my question in optistruc 4 days ago and i didn`t get answer.

     I asked tinh and he didn`t know about this.

    I found that you have experience in hypermath,


    would check this.






  14. optimization

    Thank you. Do you know that, Is it possible to link model with fmincon? Best, Mohammad
  15. Hi,

    Sorry i write in here, but i wrote my question in optistruc 4 days a go and i didn`t get answer.


    I found that you have experience in this topic.


    would check this.