Rahul R

3263

106

1. How to UNDO Boolean Operations

Which version of Solidthinking Inspire you ar using?
2. Exercise 4a: Linear transient analysis of an exhaust manifold

All the model are available in Thermal ebook. https://altairuniversity.com/free-ebook-thermal-analysis-with-optistruct/
3. Exercise 4a: Linear transient analysis of an exhaust manifold

PFA. Exhaust_Manifold.zip
4. OptiStruct ignores the settings of NLPARM

Can you first try with PARAM LGDISP 1 If it error out then,try with PARAM EXPERTNL with & without CNTSTB . Note:It is not generally recommended to change the default values. Varying the tolerances or excluding criteria may help achieve a solution, but will affect the result accuracy.
5. Duration of Initial Conditions for nonlinear Analysis

TIC is only applied during the initial phase of the analysis .Typically springback is quasi-static & you can do it within NLSTAT with enforced displacement SPC/SPCD. You could refer to below OS verification example. OS-V: 0250 3D Sheet Metal Forming
6. Weld Modeling

Refer connection: weld https://web.altair.com/altair-for-simlab-learning-center-trls
7. How to select CID during CBUSH creation

The vector orientation method works the same way for CBUSH’s as it does for CBAR/BEAM. For vector orientation: Element x axis will always be the direction defined from node A to node B on the CBUSH Element y axis will be defined by the perpendicular component of the vector you define with N1N2N3. Are you comfortable with how the N1N2N3 collector works? Element z axis will be cross of x,y Align with the local system x axis The N1N2N3 vector you define will align with y
8. Problem with defining discrete variables in negative range (initial Value not included exception)

This issue is fixed in V 2019.0
9. Please refer attached document. MV-7012_Functional_Mockup_Unit_(FMU)_in_MotionView_and_MotionSolve.pdf
10. Is there any possibility to include static- and dynamic friction in kinematic joints of any kinematic mechanism, particularly with using NLSTAT/NLTRANS subcases and with Optistruct Solver?

For now it is not possible to define static and dynamic friction in structural JOINTG elements.
11. Mesh Flow improvement in BatchMesh

I would suggest you to use the same parameter file with 2019.0 version where new and powerful mesh flow algorithm is used.
12. Mesh Flow improvement in BatchMesh

Which version of HyperMesh you are using?
13. Composite Failure and Composite Failure Index

Please refer attached document.You could also refer OptiStruct user guide :Element section Interpretation of Results for Composites Failure Criteria for Composite Laminated Shells Final Failure Index for Composite Element Failure Index for Composite Elements.pdf
14. Connect offset Surfaces

Thanks for sharing.

FPA screenshot for suggested optimization problem formulations:
16. Pretension Analysis Error Optistruct

Could you please share the .out file of the run? Note: Pretension can be modeled with either 1D or 3D bolts.
17. Error #1000***

Please delete the control card you defined. You could use thermal compliance as response instead of weighted compliance for thermal optimization.
18. Post-Processing Plots explanation

Could you please share the screenshot or .hstx file for the issue you are facing?
19. Explanation of what one can see on the solver view

Please refer attached material for convergence plot with OptiStruct 2017. plot_convergence_nlstat.pdf
20. Connect offset Surfaces

I think SPC is creating a problem.You should constrain all dof for SPC and use RBE2 rather constraining edges directly.
21. Error Codes

You could refer to OptiStruct online help where we have section for Error Message Database.
22. Connect offset Surfaces

Any specific reason for using shell? You could also try RSSCON – Shell-to-Solid Element Connector. Would be good if you could share the hm file.