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Farouk Maaboudallah

Transient Non Linear Analysis (Contact)

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Hello everyone ! 

 

I'm working on 2 dofs models (see below, the picture in right) and I need your help to run Non linear Transient Analysis. 

image.png.cb8613c5d6a4c4f28840c9341a16f73e.png

 

The idea is to compare Newmark scheme implemented in Octave with OptiStruct solver. 

I run first Non Linear Transient Simulation in OptiStruct and I found weird results ! For sure I did something wrong in the model. 

 

image.png.70a3cae8c210c0dd74c9e0a761d171d9.png

 

BCsREM refers to the boundary conditions; 

TSetp : TSEP card (DT and N); 

DLOAD : Dirac load to disturb the system in order the find x(t) and y(t) oscillations ; 

 

For the contact discretization, I used N2S (The mass CNOM2 to the rigid plate). And I control the contact stiffness via CONTPRM ... 

 

Do you have an example like this ? 

 

Best regards, 

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15 hours ago, saiful85 said:

 

Hi Rahul,

Where i can find the model file for this? i want to try this.

Tqvm

 

Hey 

 

There a good book provided by Altair. Inc. You can find the basic of what you're doing. You can find as well the model described in details ... 

 

Cheers, 

Introduction_to_Nonlinear_Finite_Element_Analysis_using_Optistruct-Altair_University_(2018).pdf

saiful85 likes this

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