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EP_143834591-Visitor
1-Visitor
October 31, 2025
Solved

Topology optmization - Circular geometry does not converge

  • October 31, 2025
  • 2 replies
  • 448 views

Hello PTC community

I am trying to solve a Topology optimization problem (CREO 10.0.9.0) for a rotating disc, but it is not converging properly. 

 

Here is a simplified version of the problem I am trying to solve. 

1) starting geometry = full disc

2) preserve geometries = Center and exterior portion of the disc

3) Axis have a cylindrical support 

4) Contact defined between shaft and disc

5) Centrifugal force added in the center axis direction

 

EP_14383459_3-1761919843816.png

 

criteria below: 

 

6) I tried mass reduction or stiffness and both did not converged correct

7) I am defining symmetric distribution around axis and symmetric between central plane

😎 material is defined with standard properties

 

EP_14383459_5-1761920091537.png

 

This is the result I am getting 

EP_14383459_6-1761920208770.png

 

I tryied, axissymetric model as well (pie slice), it did not work as well.

Any suggestions what I am doing wrong or how to set this problem properly? 

 

 

Best answer by Van_AG

I think you need to increase the limit in the design criteria.

In your screenshot, the optimisation result is 65.9%.
Try with an optimisation limit of 60-65% instead of 50%.

   Snap-2025-11-01-095.jpg

2 replies

Van_AG
Van_AG15-MoonstoneAnswer
15-Moonstone
November 1, 2025

I think you need to increase the limit in the design criteria.

In your screenshot, the optimisation result is 65.9%.
Try with an optimisation limit of 60-65% instead of 50%.

   Snap-2025-11-01-095.jpg

E
EP_143834591-VisitorAuthor
1-Visitor
November 7, 2025

Thanks for the reply. Yeah after change the limits I got a convergence. 


P
ProFeature16-Pearl
16-Pearl
November 2, 2025

HI @EP_14383459

 

Please note that when setting the limit percentage, the volume is also included in the preserved geometry.

From the screenshot you shared, it appears that the preserved geometry accounts for more than half of the volume.

 

If you want to restrict only the design space, I recommend trying a different strategy where the design space is set to 100%, and the other bodies are in contact with it.

 

Thanks

 

 

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