Learning Forum

[Lucas Cavalcante]

Hello,

 

I am using OptisLang through Ansys Workbench. Every time I try to run a sensitivity analysis on my excel sheet (crossflow tube bank heat exchanger) I get an error saying there are no responses an MOP can be found for. I have tried simplifying the analysis to the bare bones - having just the tube diameter vary - but still the same thing. I have also tried increasing the number of samples for the sensitivity. The sensitivity analysis works fine for other calculations I have done.

 

Any particular things I should be looking for or considering to tackle this problem? I can also provide my excel sheet as needed.

 

Thanks!

[Markus]

Hi Lucas,

the message there are "no responses an MOP" seem to indicate that you did not define Output Parameters or Responses. They need to be there, which means the Excel Component needs to be connected to the Parameter set.  

Can you send a screenshot of a) the Workbench Project and the b) Parameter Set in Workbench?

In the help you find an example for optiSLang inside Workbench using Excel here: 
Sensitivity Analysis of a Coupled Function in Ansys Workbench
Can you try if this works fine for you?

Best regards,
Markus

[Lucas Cavalcante]

Hey Markus,

That tutorial works fine with my computer. I have also done other smaller projects that worked perfectly. Hopefully the screenshots are fine, I also added screen shots for the sensitivity setup. Feel free to ask for more if needed. 

Thanks

[Markus]

Hi Lucas,

 

thanks a lot for the explanation and the pictures. Good that the tutorial is working fine.

 

You showed the “Parameter” and the “Criteria” tab. Can you also share the “Result designs” view, please?

 

Can you please also share a picture of the Error Message?

 

Another way of working might be to work in optiSLang with the Excel node, as shown here:

Sensitivity Analysis of a Coupled Function in Microsoft Excel (ansys.com)

Best regards,

Markus