Hyperstudy & Dyna optimization

[Amasker 1]

Hi，

I have a problem that puzzles me.

 

I use hyperstudy and Ls-dyna do to optimize composite design-related topics, but I do not know how to optimize composite ply thickness and the stacking sequence

 

Where can I find related cases or tutorials, thank you

[Rahul R 327]

You could refer to HyperStudy quick start example where we have ply stack model, which covers ply thickness and stacking sequence as input variable.

[Amasker 1]

@Rahul R  Thank you，

 

The solver in the above tutorial is Optistruct, can this optimization method be applied to Ls-Dyna?

 

In addition, there are only 4 types of composite layups, and the final optimal layup order can only be derived from the four layup sequences set previously.

 

Is it possible to optimize the layup thickness and layup order like Optistruct?

 

 

 

 

[Amasker 1]

@Rahul R

 

How to establish the connection between design variables in Hyperstudy?

 

such as design variable 1 = design variable 2, or design variable 1 = (design variable 2+ design variable 3) / 2

 

Can you give some advice? Thank you

[Rahul R 327]

HyperStudy is Solver neutral.Optimization can be performed using the analysis solver directly, or by using a fitting function.For Linking Input variable , you could refer to below HyperStudy online tutorial.

HS-1060.

[Amasker 1]

37 minutes ago, Rahul R said:

HyperStudy is Solver neutral.Optimization can be performed using the analysis solver directly, or by using a fitting function.For Linking Input variable , you could refer to below HyperStudy online tutorial.

HS-1060.

 

Thank you，@ Rahul R

 

HS-1060 is a variable connection between different models. What I want to achieve is how to link two variables in the same model.

 

[Rahul R 327]

This should work for same model also. See the screenshot shared in below post.

 

[Amasker 1]

Thank you @ Rahul R

 

Here I have a question. When setting up a parameterization file, there is an option Attach to when defining the design variable. Is it possible to associate the design variable with this,

 

which is different from establishing the Link ？

 

 

[Amasker 1]

Hi，@Rahul R

 

I have encountered a very difficult problem.
 

When performing Hyperstudy and Dyna optimization, there is no problem with nominal run,

 

but after each iteration of more than 10 times, I will report the error and terminate the calculation.

 

I am very anxious and confused. I don’t know what to do, I can help me check the model？

Study_1.xml messag

[Rahul R 327]

Which optimization method you are using?Also try by setting the ignore failed evaluation.

[Amasker 1]

On 11/8/2019 at 9:22 PM, Rahul R said:

Which optimization method you are using?Also try by setting the ignore failed evaluation.

 

@Rahul Raj Thank you very much

 

The optimization algorithm I used is ARSM.and set the ignore failed evaluation. like figure 1

 

But when the invalid iteration is more than 10 times,like figure 2. the optimization is automatically terminated. My .tpl file is too large to upload, and I don't know how to solve this urgent problem.

 

[Rahul R 327]

I see you are using HyperStudy 2017.1 and would suggest you refer attached document for ARSM based optimization algorithm for termination of optimization.

ARSM 2017.2.pdf

[Amasker 1]

2 hours ago, Rahul R said:

I see you are using HyperStudy 2017.1 and would suggest you refer attached document for ARSM based optimization algorithm for termination of optimization.

ARSM 2017.2.pdf 340.81 kB · 0 downloads

 

Thank you，

 

Is it possible to send the .tpl file to you, and check if it is wrong, but my .tpl file is too large to upload, is there any other way to send it to you?

 

Why can't I find the MAXFAIL option?

[Amasker 1]

Hi， @Rahul R

 

I imported the .k file of the problem model into hypermesh, and the error shown in the figure appears. Why is this problem? how to solve this problem？

 

 

[Rahul R 327]

I don't think this is error.If it is error, then it would have listed out with some message in the status bar.

 

Note: Its always recommended to use the latest version(For 2017version the latest patch was 2017.3 and for current version 2019 the latest patch is 2019.1)

[Amasker 1]

3 hours ago, Rahul R said:

I don't think this is error.If it is error, then it would have listed out with some message in the status bar.

 

Note: Its always recommended to use the latest version(For 2017version the latest patch was 2017.3 and for current version 2019 the latest patch is 2019.1)

 

How to solve this problem,  is it related to the software version?

 

Where can I download the latest version of hyperworks?

[Amasker 1]

On 10/28/2019 at 4:16 PM, Rahul R said:

You could refer to HyperStudy quick start example where we have ply stack model, which covers ply thickness and stacking sequence as input variable.

 

 

Hi ，@Rahul R  

 

The solver in the above tutorial is Optistruct, can this optimization method be applied to Ls-Dyna?

 

In addition, there are only 4 types of composite layups, and the final optimal layup order can only be derived from the four layup sequences set previously.

 

The composite layer I want to use is too much to be listed in the tutorial. Is it possible to optimize automaticly the layup thickness and layup order like Optistruct?

[Amasker 1]

Hi， @Rahul R

 

I have a problem that has been bothering me for a long time.  my Velocity curve is too turbulent,as picture 2， I don't know how to set the filter function?

 

How to add a filter function when setting the response in Hyperstudy,  Can Hyperstudy implement filtering?

 

 

[Amasker 1]

 

How to smooth the above speed curve in Hyperstudy？

 

This is an urgent problem to be solved.

 

Thank you

[Rahul R 327]

Do you want to measure the difference between two curves for optimization?

[Amasker 1]

37 minutes ago, Rahul R said:

Do you want to measure the difference between two curves for optimization?

 

No, I want to make the above speed curve smoother, just like the speed curve in Hyperview. As shown in the figure below,

 

is there a function that can smooth the curve?

 

 

[Mavrudieva 4]

Hi Amasker,

To smooth the curve in HyperStudy, you can use saefilter or polyfit functions available in the Expression builder. You would need to create data sources for each vector Time and Velocity and then create a Response defined with the filter expression.

 

Hope it helps. Let us know if further questions.

Diana

[Amasker 1]

Thank you @Mavrudieva

 

Thank you very much for your answer, I recently recalculated it using Hyperstudy2019, and I have a doubt

 

Why is there a test model option in each section? Is n’t it a waste of time,

 

can I skip the test model option, and there is no hyperstudy2019 tutorial or Case？ Thanks

 

 

[Rahul R 327]

New definition concept is for more complex setups & allows more freedom to explore diverse studies in a single session.

[Amasker 1]

On 11/11/2019 at 5:37 PM, Rahul R said:

I don't think this is error.If it is error, then it would have listed out with some message in the status bar.

 

Note: Its always recommended to use the latest version(For 2017version the latest patch was 2017.3 and for current version 2019 the latest patch is 2019.1)

 

Hi，@Rahul R,

 

I have upgraded the software version from 2017.2 to 2019.1, but the same problem still occurs. I am very confused and do not know what to do.

 

There were no problems in the first 12 calculations, and then an error was reported. After I opened the model file that was

 

reported, I found that the angle of the composite layer changed to 50 and the thickness of the layer changed to 60.12. here is.study file。

Study_1.hstudy

 

I'm in a hurry and don't know what to do。