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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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Using multiple LAMTHK constraints in DSIZE Card
Hello, I’m having a small issue with composite optimization. I need different thickness constraints on my part during FreeSize and Size optimization. The HyperMesh help site mentions that it’s possible to assign multiple LAMTHK constraints to one DSIZE card, but I can’t figure out how to do it since there is only one field…
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Need help with Optistruct run failed with Error No - 2148 in Inspire. Loads aren't properly done.
I have had this same error for 10 plus runs, changing forces, removing some forces, inspecting supports, changing force values, changing topology optimization material removal percentages. I use maximize stiffness. I have used this in the past, with very similar setup and have never had this problem. I understand what it…
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Convergence tolerance topology optimization in Altair Flux v2024.
Goodmorning, I'm reaching out to the community to address an issue referred to a parameter for topology optimization in Flux 2024. When setting up a topology optimization, in the part of the optimization options there's a field where the optimization tolerance can be set. The default value is 0.5%. But when I change it and…
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Optimization Tutorial Issues
Hi all, I've recently gained access to Optistruct and have been working my way through the tutorials. I'm now on the optimization module, but the topology and topography examples fail every time. They reach 100% completion, then stall for for 45min-1hour and before displaying the message: "Optimization Error. Please…
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Flux 2024 Topology optimization through PyFlux
Hello, I have a question related to topology optimization in Flux 2024. I would like to launch the optmization manually, by writing a .py script and running it in the Python editor zone of Flux. I need to run it manually because I would like to use an input .fem file that is not automatically generated, rather written by…
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Design Explorer optimization fails with EXPRESSION_ERROR when minimizing buckling factor in Altair I
Hello everyone, I am currently working with Altair Inspire and using Design Explorer to optimize a simple structure. Context: I run a static analysis + linear buckling analysis manually, and both solve correctly. The geometry is defined wuth the design variables in Inspire. The model is very simple and the analyses run…
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free shape optimization
I am currently performing a free-shape optimization of a structure. The constraint I set is a maximum allowable shrinkage of 8 mm during optimization. However, during the calculation, it only iterates once, and the optimization stops as soon as the maximum deformation from the shape optimization reaches 1 mm. What could be…
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Altair Flux 2024 Topology optimization - definition of mechanical problem
Good morning, I'm performing a Topology optimization in Altair Flux 2024. I'm working with a SPMSM electric motor and i have a doubt about how to model the mechanical problem for the optimization. I defined the rotor as mechanical region, with E, nu, and rho. Then I set the boundary condition: Fixed for all the DOFs at the…
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Flux 2024 Topology optimization - definition of element densities
Goodmorning, I'm working with Altair Flux 2024 with topology optimizations. I performed an optimization of the rotor of a SPMSM and I would like to perform another topology optimization on the previous design result. In particoular I would like to use the same densities of the design produced by the first optimization as…
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hyperstudy: Error in Running several optimization with same model with Excel
Hello, once I have defined a model in Hyperstudy with Excel, It works well to do one optimization. But then, I want to run a new optimization, I always get this error that it cannot find the excel, and thus cannot run the optimization. And the Excel is there, so I dont understand. See images for more info. Thanks a lot!
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I'm having issues with my solvers licensing
While I'm fine following the steps to check my student's license in hwDesktop applications, I'm encountering issues the time I try to launch any analysis in Optistruct and therefore trying to use HyperStudy module. How can i solve this issue? Thanks in advance.
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White paper-Multi-Material Topology Optimization for Automotive Applications with Altair OptiStruct™
Topology optimization has become an integrated part of the design cycle where light-weighting and robustness are important for vehicle structures. With advances in novel manufacturing methods, it has become easier to manufacture parts and assemblies with multiple materials, like over-molds of plastic and metal, hybrid…
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Topology Optimization X structur due to torsion
Hello everyone, for my thesis, I'm performing a topology optimization on a train car. I have different load cases, such as a compressive force or the effect of the car's own weight plus payload. In one case, the car is lifted at three of its four points, so that it's tilted in the air. This is meant to simulate a torsional…
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Analysis and Optimization of an automotive cradle using single finite element model with multiple at
https://us.v-cdn.net/6038102/uploads/4CYT8NOCARMG/nafems-auto-2019-analysis-and-optimization-of-an-automotive-cradle-using-single-finite-element-model-with-multiple-attributes-i-e-nvh-2c-strength-and-fatigue.pdf Nafems Presentation on Finite element analysis has been an important part of vehicle product design. Currently…
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Problem with skateboard Tutorial in HyperWorks 2024.1
Dear Professionals, I am currently trying to complete the "Composite optimization of a skateboard with OptiStruct" Tutorial in HyperWorks 2024.1 Now since the Tutorial is written for a older Version it is a little bit more difficult but I managed up until point 3.3.3 Check-run and Phase 2 Optimization Run (The pdf of the…
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Save invalid elements to user mark?
Hey, every time I'm exporting my solver deck files of my RADOPT opimization the question appears: Save invalid elements to user mark? Yes or No I have found a Tcl command hm_getusermark elems does this show all the elements or just the invalid ones? Because I get a huge number of elements if I type in that command. So my…
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Internal programming error
Hey, every time I run a RADOPT topology optimization the Solver fails and I get this message: *** INTERNAL PROGRAMMING ERROR *** in file "datasetFtoC.c", at location # 488. ERROR DATA: igicmt -1234 Dset ID out of range what can I do? Thanks for your help!
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Implementing supervisory control via DLL in PSIM (real-time synchronization issue)
Hello, I’m trying to implement a supervisory control system using optimization codes in PSIM to generate the reference signals for converters in the simulation environment. The optimization code is written in C++ and implemented as a DLL block in PSIM. I’m using the Gurobi solver to handle the energy management…
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Problem with importing sizing.fem file in Hypermesh
Hi, I did a free size optimization of a composite model (with optistruct) and when I try to import the sizing.fem file Hypermesh instantly crashes. I'm using a student license and the 2024 version. How can I solve this problem? Thank you in advance.
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Analysis and Optimization of an Automotive Cradle using Single Finite Element model with Multiple At
White paper "Analysis and Optimization of an Automotive Cradle using Single Finite Element model with Multiple Attributes i.e. NVH, Strength and Fatigue" https://us.v-cdn.net/6038102/uploads/EH692AS8KOFY/singlemodelmultipleattributeworkflow.pdf Finite element analysis has been an important part of vehicle product design.…
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Hyper study - stuck in task evaluation
hi all, I am working optimizing an IPM motor designed from Fluxmotor. In the process of task evaluation, i get my write, execute and extract to be running succesfully but after a number of runs,- some times after 92% or 20% in the process of evaluation, the system gets stuck and there is no progress in the evaluation hence…
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Hyperworks 2022.1 run options analyze to optimization
Hi, I'm doing the tutorial: Track 2: Design Composite Structures with Simulation 3 Composite Optimization While doing the free-size optimization, changing the run options from analyze to optimization seems possible. I tried with 2022.1, and it's clearly not possible in this menu. I was looking at the Solver Options but I…
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Radioss optimization error
Hi, I'm trying to run an simple toy topography optimization problem in Radioss where a pressure is applied dynamically to a square plate (solid elements). When running the RADOPT file I receive the following error. How can I understand what is happening here? *** ERROR # 4306 *** No ESL is generated by SUBCASE 1 to do…
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Fast-Track eDrive Efficiency Maps in PSIM | Webinar June 2025
Fast Track eDrive Efficiency Maps in PSIM This webinar walks through an end-to-end process for generating efficiency maps in PSIM - both at the inverter level and system level - by leveraging its seamless connection with Altair Flux. We'll also cover strategies and tips for making sure all operating points are hit…
