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Alexander Großmann

Bicycly Stem Topology Optimization Tutorial Error # 2148

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Hi everybody,

 

I tried to do the "Bicycly Stem Topology Optimization Tutorial" from the Learning Library of Hyperworks.

 

Following the steps according to a Youtube optimization tutorial, the following error occurs:

 

 *** ERROR # 2148 ***
 Invalid design problem.
 All the sensitivities of response 1 (objective) are zero.

 

How can I solve this one?

 

Cheers,

Alexander

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Hi Alexander,

 

Look at your linear static results and make sure you see some displacements, if not, check your load step and make sure you assigned the loads correctly.

 

Girish

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Update: I checked the optimization response and the load step was not applied. However, when I want to check the box (as displayed in the attached screenshot) and klick return, this is not saved. So when I reenter the loadstep and try to apply it to the compliance, the box is still unchecked.

Why does the software not allow me to apply the loadstep?

loadstep.PNG

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Hi Alexander,

 

In your model, the yellow and green components are not attached. There is some clearance in between the components. Kindly correct this and try again.

AlexanderG.PNG

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