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Optistruct missing .dll files
I've installed Optistruct using hwsolvers2026_win64.exe, the installation was successful and there are no errors in the logs, but I'm unable to open it, I'm getting errors saying these .dll files are missing. cudart64_102.dll cublasLt64_10.dll cublas64_10.dll cusparse64_10.dll
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Different explicit result: abaqus vs simlab optistruct
https://us.v-cdn.net/6038102/uploads/LYRBCRKRHJ0W/singlebar.inp One bar should give about 10N at 4cm compression in abaqus. However, after I imported it into simlab, SPC force results in 3kN. I also made material test using simple cubic or dumb bell, they has same behaviour in material test.…
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Best way to parametrize electric motor?
Hello, I am designing an electric motor and I am looking for the best solution to parametrize my model in order to study the effect of several geometrical lengths in my design. At the moment I am working with SolidWorks, but SimLab does not allow me to change its geometry in a parametric way. Therefore, every time I want…
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Non-linear static analysis run parameters
Hello, I'm new in non-linear static analysis. I've created a model in Hypermesh with Large Displacements enabled. When it is running using Altair's Compute Console and Optistruct solver, several parameters appear in the Solver View. I did not find any information about what do they mean. They are: Non1_EUI_st, Err_EPI_st,…
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Optistruct Compute Console license errors - student edition
I have been using Inspire for optimisation without error but needed to do some work with composite lamina so downloaded hypermesh and began using it. When trying to run my .fem file I am greeted with a load of license not found errors in my OUT file. What could be my fix? Feature(s): HyperWorks, HWOptiStruct Error Code: 9…
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Hyperelastic model para
https://help.altair.com/hwsolvers/os/topics/solvers/os/mathe_bulk_r.htm How's I and J calculated? Thanks Qin
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Moving heat source analysis
Hii, I want to perform a heat source at constant temperature moving on a body, I need to determine the effect of heat on the body, There is a tutorial in radios but it ain't in detail, Suggest me some methods, if its possible in optistruct that would be great The heat source moving at the defined and the heat transfer…
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Not gatting solution
In HyperMesh 2026 (OptiStruct user profile), my OptiStruct job completes immediately after the header with no analysis/iterations — .out file only shows startup info + empty "Iteration Subcase Variable Grid/Elem ID Value" table. No subcase processing or results. Model Browser shows: Load Step Inputs (1) SUBCASE (2) under…
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Unexpected Result Nonlinear Static Analysis
Hey all! I'm doing an assignment for a FEM course in my university. The scenario has a beam in the x-axis and a moment applied in the negative y-axis at the beam tip. The issue is that the beam does not deflect as expected. Instead of the tip bending upwards, the middle of the beam starts moving upwards and then backwards…
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OptiStruct 2025.1 Student Version – License Active but Solver Fails
Hello, I am using the Altair Student Edition license. I followed all instructions from the official Altair Student page: Registered and verified my academic email Generated the activation key Installed HWDesktop 2025.1 Installed HWsolvers 2025.1 Activated the license successfully using Altair License Utility HyperMesh…
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Apply enforced displacement
Hi ! I work on hypermesh and would like to apply an enforced displacement on a cylinder (for basic static analysis) but I don't know how to make it : should I use SPC node or SPCD node ? I thought to apply the load on a RBE2 independant node but when I run the simulation I have this message : *** ERROR # 4821 *** Fixed…
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Is it possible to equivalence same node numbers, from include files, while importing master file?
In master and include file, I have same node ID's at two locations (Diff Coordinates). The objective is to equivalence the same Node ID's while importing the master include file. If I import the master file, the element corresponding to the duplicate node id is getting deleted. Is there any possibility to retain the…
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HyperMesh Frequency Response (Modal) Setup Using Python
Hello community, I am trying to set up a dynamic stiffness (frequency response) loadstep using Python and TCL, with the OptiStruct solver. It seems that the setup is complete in the HyperMesh GUI, but when exporting the FEM file, the displacement output control is missing. Therefore, it triggered ERROR #291. I’ve attached…
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SimLab : Problem with the configuration of OptiStruct
Dear everyone, I have a problem with Simlab when i try to run the solve of my simulation. I have a probem/error that's tell me " OptiStruct solver environnement is not configured". So i downloaded the additionnal file to try to solve this problem, but i had the same problem. On the community, people had the same problem…
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Is there an official CZM (Cohesive Zone Model) example from Altair?
Hi guys! I’m looking for an official Altair example (tutorial, demo model, or documentation) that demonstrates the use of Cohesive Zone Modeling (CZM) — ideally in HyperMesh / OptiStruct. Thanks in advance!
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How to obtain convective heat flux output on a specific surface ?
Hello everyone, I'm working on a steady-state thermal analysis using HyperMesh with the OptiStruct solver and I'm having a trouble post-processing the convective heat transfer from a specific surface. My goal is to obtain the convective heat flux on a surface ( W/m^2) and then integrate it over the surface area to obtain…
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Documentation about the usage of CGAP - Post processing
Dear, I am strugling to post process the contact results of analysis with CGAP elements in Hyperview. My main focus now is post processing, but please it would be helpful if someone could also share with me some documentation about the usage of CGAPs in linear and non-linear analysis. Training material (hands on tutorials)…
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Is it possible to do Transient thermal analysis of a motor in 2D ???
Hi everyone, I am currently working on a motor design project and have successfully completed the 2D Electromagnetic Analysis in SimLab. My goal is to perform a Transient Thermal Analysis while keeping the workflow in 2D to optimize solve times. I am running into two specific hurdles: Cooling Channel Definition: When…
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Penalization SIMP topology optimization in Flux v2024
Hello, I am reaching out to clear a few doubts on the way topology optimization is implemented in Flux v2024. When using the SIMP method, what is the penalization applied to? Relative permeability, reluctivity or something else? If possible, I would also like to know the interpolation scheme used for the parameters(s). In…
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Optistruct spring/bar contraction control
https://community.altair.com/discussion/comment/199443?tab=all#Comment_199443
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Regarding the application of continuous forced displacement in Optistruct
I have a board now, and I need to move it up 50mm in the first working condition. In the second working condition, I need to move it up 20mm on the basis of working condition one. In the first load step, I used SPCD to move it up 50mm, and in the second load step, I used forced displacement to move 20mm and continuous load…
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Usage of CGAP to model bolted joint clearance
Dear , I am trying to model CGAP to model the clearance in bolted joints. This element is used to connect CQUAD4 with CBUSH on both extremities of the joints. I am checking this modeling techinique with a simple model before implementing it in a detailed model. In this model, the load is not transferred through the bolts…
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display contact elements
How to display contact elements created during analisys? As the example given in the opistruct help Thanks
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Regarding the contact settings for interference fits in Optistruct
I currently have two parts with an interference fit of 0.55mm. When modeling the actual model, it was through penetration, and the mesh division was also through penetration. I set Clearance=-0.55 in the optistruct contact, but the mesh nodes remained through. Is this correct? Or do we need to manually move the grid nodes…
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NL transient thermal analysis - heat transfert loads - hypermesh + optistruct - 3D model
Hello dears, heat transfert input data of a 3d model is made of: an element face number a value of Q0 related to the surface of this face I have to apply a heating power on a total surface of let's say 0.1 square meter. this surface is curved, and the meshing is not regular (because of misc. considerations) My questions…
