ANSYS Substructuring: Refining Large Models with Boundary Effects

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In summary, a substructuring approach can be used to refine a small portion of a large ANSYS model while maintaining accuracy in the results, by creating a superelement of the remaining 'boundary' model and applying it to the refined portion. This approach helps to capture the boundary effects of the rest of the model.
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I have a very large ANSYS model with many loads and load cases that results in an array of stresses and strains. I need to update and refine the geometry and loading in a small portion of it, while maintaining accuracy in the results for that portion. This includes the inclusion of the boundary effects imposed by the rest of the model I am not refining.

1. Is a substructuring approach appropriate?

2. Is it feasible to delete the portion of the model I want to refine, create a superelement of the 'boundary' model remaining, generate the refined (small portion) model, then apply the 'boundary' superelement to the refined (small portion) model?

Any input is very helpful.

Thanks
 
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!Yes, a substructuring approach is appropriate in this situation. It is feasible to delete the portion of the model you want to refine and create a superelement of the 'boundary' model remaining, generate the refined (small portion) model, then apply the 'boundary' superelement to the refined (small portion) model. This approach helps to capture the boundary effects imposed by the rest of the model.
 

1. What is ANSYS Substructuring and why is it important?

ANSYS Substructuring is a simulation technique used to refine large models with boundary effects. It involves breaking down a complex structure into smaller, more manageable substructures while retaining the overall behavior. This is important because it allows for more accurate and efficient analysis of large, complex models, saving time and resources.

2. How does ANSYS Substructuring work?

ANSYS Substructuring works by dividing a larger model into smaller substructures and analyzing them separately. The interface between the substructures is then refined to account for the boundary effects. This allows for a more detailed analysis of the local behavior at the boundaries, while still considering the overall behavior of the entire structure.

3. What are the benefits of using ANSYS Substructuring?

The main benefits of using ANSYS Substructuring include improved accuracy, reduced computational time, and increased efficiency. By breaking down a large model into smaller substructures, the analysis can focus on specific areas of interest and account for boundary effects, resulting in more accurate results. Additionally, the smaller substructures can be analyzed separately, reducing the overall computational time and allowing for more efficient use of resources.

4. Are there any limitations to ANSYS Substructuring?

While ANSYS Substructuring is a powerful technique, it does have some limitations. One limitation is that it may not be suitable for all types of models, particularly those with extremely complex or irregular geometries. Additionally, the accuracy of the results may be affected by the choice of substructure boundaries and the level of detail in the interface modeling.

5. Can ANSYS Substructuring be used for any type of analysis?

Yes, ANSYS Substructuring can be used for a variety of analysis types, including static, dynamic, and thermal analysis. It is particularly useful for large models that exhibit nonlinear behavior or have complex geometries. However, it is important to carefully consider the limitations and assumptions of the technique for each specific analysis case.

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