Topology optimisation

Altair Forum User

Hi, I am new to Hyperworks.

 

I am getting Error 2148 'All the sensitivities of response 2(objective) are zero.

 

Also:

 

1)I put a pressure across each element on the circles as I want a distributed load of 150N on each circle. Is this correct?

 

2)In reality my beam is welded on each end. Are my degrees of freedom correct?

 

I have attached the file. 

 

Thank you.

Unable to find an attachment - read this blog

Altair Forum User

Hi guys,

 

I currently need urgent help on this topology optimization. I keep getting:

*** ERROR # 2148 ***
 Invalid design problem.
 All the sensitivities of response 2 (objective) are zero.

 

I am unsure how to fix this and have been trying for hours going through the forum and trying different things. Could you please help me with this? Thank you 

Unable to find an attachment - read this blog

Altair Forum User

There is a problem with my degrees of freedom but I am unsure on how to fix this

Altair Forum User

Hi Yousif,

 

I am unable to download the file.

 

The error could be due to under constrained structure or the load is not applied on the structure at all.

 

Try this:

 

1) Remove all temporary nodes and recreate loads again. If there is no problem with the loads, then 

 

2) Can you constraint the structure in all DoFs and try again?

 

Altair Forum User

Update:

 

I downloaded your model from one of the other posts,

 

There is no connection between the design space and non design space components. Due to this no load is transferred to design space.

 

Connect both and try again. 

Altair Forum User

Hi Prakash, 

 

You said the same thing in a previous post. I am not sure what you mean by this. I imported the file from solidworks. How do I make this connection? 

 

Thank you 

Altair Forum User

Hi Yousif,

 

You can connect using rigid elements or use FREEZE/TIE contact.

Altair Forum User

Thank you Prakash I will update you once I do this