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How to combine Topology optimization and Hyperstudy for MDO.

venkatesh_20979

Hi,

I optimized the casting component using Topology optimization, Now i want to do Multi Disciplinary Optimization(MDO) study using Hyperstudy for both Durability and Crash load cases.

How setup or combined the load cases in Hyperstudy.

Give some suggestions or Tutorial files related to both Topology + Hyperstudy

Thanks..

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HyperStudy

v2020.1

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Adriano_Koga

you won't be able to easily combine the topology optimization with the other loadcases.

HyperStudy allows you to perform shape and size optimization, a little bit more restricted than OptiStruct.

You can plug all your models in HyperStudy, and for that, you have a few tutorials in the help for this MDO, but you won't be able to directly couple the topology optimization study on it. Except if you create some scripts to extract the densities from the topology and update the durability and crash scenarios with the same topology.

venkatesh_20979

Hi Adriano A.koga,

Thank you.

If possible can you please help me out in scripting to extract the densities from Topology and to combine in MDO.

Thanks.

Adriano_Koga

Hi Adriano A.koga,

Thank you.

If possible can you please help me out in scripting to extract the densities from Topology and to combine in MDO.

Thanks.

hi,

there are 2 aspects here:

- scripting something like this would involve invoking the OSSMOOTH tool and use it to create a new mesh from your topology optimization, and then, with some other script, updating your Cras and Durability models with this new mesh. honestly this would take a while, even for someone experienced with TCL scripts.

- the second point is that assuming that you're running a topology optimization based on a linear model, you should take care on proper definition of the metrics for the optimization so that they are valid for the other physics involved. For example, if you have some part that during the crash deforms a lot, then it is hard to represent this as a linear loadcase.

That being said, I'd say that maybe you could do this separately.

First create a Topology optimization model, and try to embed some approximation concerning crash and durability, to come up with a concept design.

After that, create a preliminary design over this concept, and then on top of this, build a MDO for durability and crash, with your full models.

I'm not saying that this is the only approach, but to me it would be easier.