Multiple Steps Analysis (optistruct)

Altair Forum User

Hello dear,

 

i am trying to perform a buckling analysis to rod,

but before buckling, 

in the first step i need to perform interference fit,

in the second step, i need to perform bolt pretension

in the last step i need to do nonlinear Buckling,

 

 

i did some operations but i am new for optistruct,

after interference fit in the second step i come across with faulties so that the calculations stops

can you please check the model?

 

i updated the latest model that i use for calculation

 

in the previous model,

i had problems to start the second step after first step,

i was performing interference fit but i had problem in the begging of bolt pretension so that i did changed the master - slave for bolting,

then i got the latest version which i attached.

in the attached model, i was able to start bolt pretension after interference fit but i came across with a problem, so that i am not sure if i have some problems in the defitions because i am new for using optistruct.

 

i use Hypermesh 14.0.2 version

 

thanks you so much

 

Unable to find an attachment - read this blog

Altair Forum User

Hi,

 

Thank you for sharing the files.

 

I will check and update to you soon.

Altair Forum User

Thank you So much for your interests

 

 

Altair Forum User

Hi @Seftin

 

Some how the mumps solver is failing to run the model. I will check with experts and will get back to you soon on this.

Altair Forum User

Thank you Prakash,

 

i mostly come across with such problems after bolt pretension and interference fit,

 

according to your suggests i will retry the old models too.