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.h3d file and .force file correlation
Hi, I just wanted to confirm exactly what results the .force file presented compared to visualising the results in a .h3d via Hyperview? For example, I was under the impression that if you gave an element a defined MCID that this is what the .force output file would generate results with respect to. However, when I check…
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Modeling 3-Point Bending Test of Sandwich Panel: OptiStruct or Radioss?
Hello everyone, I am working on a FE simulation of a 3-point bending test on a sandwich panel using HyperMesh 2025.1. Model Details: Components: Top and bottom face sheets + different types of core formats Material: All metallic parts. Interface: The face sheets are bonded to the core crests using a resin layer.…
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Using EIGVSAVE/EIGVRETRIEVE for Random Respone analysis
Hi, I was wondering if anyone has managed to successfully use the modes calculated in a modal analysis as an input for a random response analysis. Every time I try to run it, I get an error saying “current model does not match the database from the EIGVSAVE”. This is despite using the exact same model. Thank you.
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Free-Free run ending abruptly without any errors and output.
I am using HM 2026 student version for my model building (free free modal analysis of a university student team project. The model had SHELL, BAR, SOLID, RBE2/3, CONM2 & TIE) When I submit it for a run I am getting just the above text in my .out file. It does solve. My total node count is ~22k. It run when the node count…
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unable to download optistruct 2023.1
unable to download optistruct 2023.1
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Random Response Fatigue Analysis Damage co-relation
Hii everyone, I'm try to co-relate the damage evaluation given by hyperlife tool with hand calculations, I computed Random Response fatigue analysis, imported into hyperlife tool, I'm using stress combination Vonmisses, Mean stress Goodman,Layer worst, Type of loading Random (PSD Stress) Damage model THREE, I have assigned…
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How to use ESLM correctly in OptiStruct software
Description: Why do I keep receiving a warning that the corresponding setting cannot be recognized after I enter 'DOPTPRM, ESLM, YES' in the .fem file and then reopen the model file? How can I use ESLM correctly in OptiStruct? Does it have anything to do with the load cases set up in my model? Can this method be applied to…
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Non-linear Optistruc buckling analysis
Hello everyone, Is there any news/update regarding Optistruc non-linear buckling analysis? Regards, Axel
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Definition of Motor Inductance in Circuit
Hello everyone, I see that in tutorials an inductance in the motor circuit is defined but I do not understand how this is calculated. Could you please provide a help in calculating this value for an axial-flux motor? The inductance changes with the rotor position, so how could I already give it as input in the circuit…
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Exterior acoustic simulation of Motor to predict SPL using Surface velocity data a input?
Hi, I have a surface velocity data of E-motor/Engine generated by third party MBD solver in .pch file format. I would like to use this data as a excitation to predict the exterior noise at 1m distance microphones. I have looked at the documentation of IE, RADSND & APML methods in optistruct. Surface velocity required for…
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PROGRAM STOPPED: ERRORS DURING ELEMENT QUALITY CHECK
I am trying to perform topography optimization with PARAM,CHECKEL,NO. However I am getting element quality error. I tried checking these elements in hyperview and run quality check but these elements are good. I am not understanding why solver is giving this error.
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OptiStruct Student License Issue – Feature Not Found Error
I am currently using an Altair Student Edition license (valid until February 1, 2027) and I am experiencing an issue when trying to run OptiStruct on computer console. Until last thursday (march 26), everything was working normally. However, I am now receiving a license error indicating that the OptiStruct feature cannot…
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Critical Plane option
Hi, I am looking for the Critical Plane (CRTPLN) option in FATPARM (COMBINE) card under OS 2024.1. This option, availbale in the Help, is missing in the Product. Some help? Thanks.
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Help with running Optimize in Inspire
I have a new install of Inspire that I am following tutorials to get familiar with the UI. I ran an optimization this morning that produced some results but were different from the tutorial videos results. I ended up remodelling a part of the structure as it was extruded in the wrong direction and when I ran the next…
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License deactivation and re-activation
I recently had to change my PC because the previous one had broken (I have no possibility to work with it). Now that I downloaded HyperMesh and Opistruct from my student bundle I can't activate my license again (I activated it on my previous PC). What shoud I do to be able to activate it on my new computer?
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how to get the material non linearity results in optistruct.
In my current simulation, I need to establish contact between two components. Initially, the contact occurs at a single point(small area), but as the load increases, it transitions into surface contact. However, during the simulation, the initial point contact leads to excessive localized plastic strain at a single node,…
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Thermal analysis with a MAT9OR material card
Hi, I need to simulate the thermal expansion of a 3D-printed part which is heated in an oven. The material has anisotropic behaviour and therfore I chose a MAT9OR card. How do I set up such analysis in optistruct?
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Random Vibrations response in Topology Optimization
Hi, I'm looking into the design of a componet subject to strong random vibrations, I read that Optistruct can use the stress response of a random vibration as a constraint in the topology optimization, and can optimize the structure such that the 3 sigma stress stays below a certain limit for the component subject to the…
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hypermesh, optistruct
Hello everyone, when I try to use OptiStruct in HyperMesh v2022.3, it tells me that it is not installed correctly. It seems that in the Marketplace only the version I mentioned is available. Maybe someone knows how to install the solvers or how to download them so I can install them properly
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3D mesh display problem in Simlab
Hello, I meshed my model with 3D elements but the volume doesn't seem to be filled. I only have the mesh on the surface. Is it only a display problem ? Is it possible to display the volume ? Thank you
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The OptiStruct Optimization Professional Specialist Certification is now live!
The OptiStruct Optimization Professional Specialist Certification is now live on the learning platform! This certification covers using OptiStruct to setup and solve various optimization types, including OptiStruct features, capabilities, and formats, elements, properties, and materials, loads, boundary conditions, and…
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The OptiStruct Dynamics Professional Specialist Certification is now live!
The OptiStruct Dynamics Professional Specialist Certification is now live on the learning platform! This certification covers using OptiStruct to setup and solve modal, frequency response, acoustic, random vibration, and rotordynamics analyses, including OptiStruct features, capabilities, and formats, elements, properties,…
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The OptiStruct Statics Professional Specialist Certification is now live!
The OptiStruct Statics Professional Specialist Certification is now live on the learning platform! This certification covers using OptiStruct to setup and solve linear and nonlinear static analysis, including OptiStruct features, capabilities, and formats, elements, properties, and materials, loads, boundary conditions,…
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The OptiStruct Essentials Associate Specialist Certification is now live!
The OptiStruct Essentials Associate Specialist Certification is now live on the learning platform! This certification covers using OptiStruct essentials for finite element simulation analysis, including OptiStruct features, capabilities, and formats, model entities such as elements, properties, and materials, analysis…
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Migration to Siemens
Altair have gone dark. No response from Siemens support or my account manager. I can't find my Site ID and that seems to be needed to complete setup of the Siemens account. I have multiple E-mails saying I will get an E-mail with details to login, and an E-mail saying I should have had an E-mail with instructions, but no…