fedp
Bioengineer
- Feb 17, 2015
- 1
Hello,
I would like to have your advice on managing large models with several pre-stressed instances that I would like to import in a new simulation.
Here are the details of my problem:
I have a large database of components, for which I computed the pre-stressed state in an initial FE analysis. Now, I would like to assemble several of these components, in different configurations, to compute the next step of my FEA. For example: comp-1 with comp-2 or comp-1 with comp-3 and comp-4... In each simulation, the position and orientation of the components may vary, i.e. I will need to translate and rotate the components depending on the new assembly.
The obvious choice would be to compute the pre-stress and the next simulation step for each type of assembly inside the same simulation, but since the computation of the pre-stress state is pretty long and there is a very large number of configurations, I cannot afford to do that.
Currently, since I have not found any way to import several initial FEA in same simulation (only one oldjob allowed), I am doing the pre-stress computation of all components in the same simulation, and then I only import the instances (*import) that are present in my current assembly. This is working for now, as I have only modeled some of the components, but the initial simulation will become extremely long as more components are implemented...
And I am able to position instances of my assembly by creating a first step in the simulation during which I translate the components, but I have trouble to rotate them (I need to rigidly translate and rotate deformable bodies). I found that Abaqus as no ability to change the location of imported instances, during import.
To sum up. Is there any solution to import instances from different previous analyses (by merging the restart files, using python scripts...)? And what is the best way to assemble these instances (impose their relative positions and angulations)?
Any comment, idea, trick really appreciated!
Thank you in advance!
I would like to have your advice on managing large models with several pre-stressed instances that I would like to import in a new simulation.
Here are the details of my problem:
I have a large database of components, for which I computed the pre-stressed state in an initial FE analysis. Now, I would like to assemble several of these components, in different configurations, to compute the next step of my FEA. For example: comp-1 with comp-2 or comp-1 with comp-3 and comp-4... In each simulation, the position and orientation of the components may vary, i.e. I will need to translate and rotate the components depending on the new assembly.
The obvious choice would be to compute the pre-stress and the next simulation step for each type of assembly inside the same simulation, but since the computation of the pre-stress state is pretty long and there is a very large number of configurations, I cannot afford to do that.
Currently, since I have not found any way to import several initial FEA in same simulation (only one oldjob allowed), I am doing the pre-stress computation of all components in the same simulation, and then I only import the instances (*import) that are present in my current assembly. This is working for now, as I have only modeled some of the components, but the initial simulation will become extremely long as more components are implemented...
And I am able to position instances of my assembly by creating a first step in the simulation during which I translate the components, but I have trouble to rotate them (I need to rigidly translate and rotate deformable bodies). I found that Abaqus as no ability to change the location of imported instances, during import.
To sum up. Is there any solution to import instances from different previous analyses (by merging the restart files, using python scripts...)? And what is the best way to assemble these instances (impose their relative positions and angulations)?
Any comment, idea, trick really appreciated!
Thank you in advance!