# Inertia relief analysis of same model was performed using Optistruct and Nastran, Result of Optistruct was showing very high stresses to that of Nastran. Why is it so?



##### Post Metadata
- Posted at: almost 6 years ago
- Author title: CAE Analyst at Tech Mahindra Deputed at Mahindra Trucks and Buses Division
- Net upvotes: 1


## Comments
### Comment 1

OptiStruct solves both linear and nonlinear problems using an enhanced proprietary version of NASTRAN. We’d need to see the model to troubleshoot your issue.

##### Comment Metadata
- Posted at: almost 6 years ago
- Author title: I love lead generation and marketing operations!




## Related Product
[Altair OptiStruct](https://www.g2.com/products/altair-optistruct/reviews)

## Related Category
[Simulation & CAE](https://www.g2.com/categories/simulation-cae)

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