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Community Champion of the Month - June, 2025
The Community Team would like to introduce the June Champion of the Month, Andreas Altmann @AndreasAltmann. Andreas works as a Senior Specialist Development CAE at thyssenkrupp Automotive Technology. His work covers a wide range of simulation topics, including NVH, stiffness, strength, crash, and optimization. “I’m…
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Simulation error during bending test setup on merged geometry in SimSolid [Inspire v2025]
Hello, I am currently setting up a bending test simulation in Altair Inspire v2025 using SimSolid. The part consists of a hexagonal lattice structure embedded in a solid outer shell, modeled using implicit geometry and then combined with Boolean operations. After using the Combine tool to merge the lattice with the solid…
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The DoE for modal analysis fails to run
Hi, After running the DoE, it failed — but the results were still exported, and the output file reported that the analysis was complete. I also checked the log file and found the error shown in the image below. How can I fix this issue? The DoE fails when I run the modal analysis. Best regard,
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Reading CSV files with magnitude/phase data with complex plot type
Hi, I am trying to read a CSV file that has frequency response curves as follows: column 1: common frequency values column 2: curve 1 magnitude values column 3: curve 1 phase values (degrees) column 4: curve 2 magnitude values column 5: curve 2 phase values (degrees) etc… i.e. of the format X,Y1m,Y1p,Y2m,Y2p,…. However,…
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Reading multiple subcases from a Punch (*pch) file into Hypergraph
Hi -it doesn't appear that Hypergraph can read multiple subcases from a punch (*pch) file at once. The punch file is from an Optistruct run and has frequency response functions (FRF) curve data within…. in my case vibration transfer functions in velocity to/from several locations in a model. Converting the file to a CSV…
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Multibody & Non-linear FEA Co-Simulation with MotionSolve and OptiStruct: Battery Pack Use Case
NOTE: A solid, in-depth understanding of MotionView for vehicle modeling and OptiStruct for structural analysis is essential to successfully implement this type of MotionSolve–OptiStruct co-simulation workflow. *Refer to the attached folder, containing detailed process of the MS-OS Cosim workflow along with all the model…
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RBE2 problems
I had to unistall hypermesh because of disk space but now that I have reinstalled it this problem has showed up. While I am creating a rigid element RBE2 I get the error: '' *setvalue: invalid dataname or numeric code: RIGID_ALPHA '', still, the value of alpha is set to 0 and the depentent DOF is set to 123456. I have…
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Modal Transient & Superposition Fatigue Setup - SPCD, TLOAD, DLOAD
I'm running two simulations: (1) Modal transient fatigue in OptiStruct and (2) Modal superposition fatigue using OptiStruct + HyperLife/nCode. Loading consists of four Z-axis acceleration time histories applied at front and rear suspension mounting plates (two each) using SPCD (DOF3 = 9810). I’ve defined 4 SPCDs, 4 SPCs…
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OptiStruct Not Recognizing Student License
I am attempting to perform Finite Element Analysis for a class. I have an Altair Student License for Wayne State University. I have processed the model up to exporting a .fem file, but when I run it through the Compute Console, it claims that I am missing the GlobalZoneAM on my License. Why is this happening?
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OPTISTRUCT JOB SUBMIT OPTIONS
Description: Big Linear Static FE model (very Big) is still running 5 days through Altar Compute Consol. I don't know how much progress go. Is there way to check thr progress? AND, I am using option like “-core min -mpi i -ddm -np 4 -nt 12". Is there more powerful option? It takes a too long… Thanks Product/Topic Name :…
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Flutter Analysis with OptiStruct
Introduction Flutter is a dynamic aeroelastic phenomenon in which the aerodynamic loads on a flexible body couple with its natural modes of vibration to produce oscillatory motions with increasing amplitude. This may lead to catastrophic structural failure and hence structures exposed to aerodynamic loads must be carefully…
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Question About PCOMPLS
Hello everyone, I need to simulate a model where laminate A is soldered to PCB board B, and PCB board B is glued to a structural component, then perform thermal stress (deformation) analysis on the entire system. Here are my specific questions: 1. Material Model Selection PCB board B and the structural component are…
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connector modelling with Penta Mig?
Hi, i am currently using Optistruct, and I am having some issue with the connector modeling. In this photo you can see that the gap between the two surface is not fully filled by the penta mig , it is not an error i think but there may be some problems when i will launch the model because the stress there may be…
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Keep getting "Optistruct environment not configured"
I am trying to run a static stress analysis in simlab but I get the message "Optistruct environment not configured". I have all the additionals installed and have even reinstalled simlab. I also have the hwsolver application installed but with no luck. What am I missing?
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How can i solve this error-Current limit is 10000. Use "MSGLMT" control card to change this value.
As I tried to run static analysis of shaft with one end fixed and another end moment applied,steel is material considered.OPTISTUCT SOLVER USED HERE
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Is there an overview for the nomenclature of stress results in Hyperview?
Hello everyone, In my random response analysis I get von mieses stress outputs with the prefix (Z1) or (Z2). What exactly does that mean? Despite spending quite some time searching the docu I wasnt able to find an definitive answer. I only found this page on processing nastran results. There it is said that Z1 and Z2…
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SimLab～Optistruct or Radiossでのワークフローに関して
固有値解析結果で得た固有振動数を利用し モーダル周波数応答解析を行う場合、 ・参考となるマニュアル、チュートリアル資料あれば頂きたい。 ・加振荷重、モード減衰比、固有値結果の取り込み方法などを 知りたい。
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Sampling rate and stress plot
Hi everyone, I would like to ask two questions: I'm trying to increment the sampling rate for acquiring points of the curve by increasing NLOUT, NINT but I'm still getting the same amount of points. Do you know how to properly to this in order to have a smoother curve? In addition, I would like to obtain a plot like this…
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I want to conduct a thermal stress analysis on a rectangle geometry in Hyperworks.
What Steps should I follow to add a Convection and Radiation Thermal load on the Geometry? Is there any Tutorial available in online which I can follow.
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Why is my model taking longer to converge even though convergence is good?
I have given DT=0.1, DTMIN=0.0001, I have not specified DTMAX. I don't why it's taking longer time to converge, Is it because of DTMIN? I have given only enforced displacement SPCD=30mm. It's converging but it is taking longer time to get solve. What is the preferred DT, DTMIN and DTMAX value. How the solver takes the time…
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[OptiStruct] 다수의 해석 파일을 batch로 순차 실행시키는 스크립트
해당 스크립트는 사용자가 지정한 경로 및 파일 확장자에 대해 확인하여 OptiStruct를 배치 모드로 실행하는 스크립트입니다. 다수의 OptiStruct input 파일을 순차적으로 실행시키고자 할 때 사용할 수 있습니다. 사용 방법: py 파일을 텍스트 편집기로 열어 아래의 내용을 수정하고 저장 osPath : OptiStruct가 설치된 경로 지정 path : 해석 인풋 파일이 위치한 최상위 폴더 경로 지정 ncpu : 해석에 사용할 CPU 수량 입력 cmd 창 열기 py 파일 위치로 이동 python *.py 명령어를 입력하여 py 파일 실행 참고 사항:…
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UNV reader block error" in OptiStruct OP2 file
I am encountering an error when trying to run fatigue analysis using the OP2 file generated from OptiStruct. The fatigue solvers I have tried are Fe-safe and an in-house tool. The error message is as follows 2025-06-18 19:55:47 HyperWorks Information: UNV reader supports only block 55 and block 2414 for the…
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huge temporary files
Hello Altair Communuity, I built a large finite element (FE) model and want to evaluate the stresses in the components. The problem is that HyperWorks creates a large number of temporary files during the calculation, which causes the calculation to break down when only a few elements are output (less than 100,000). If the…
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HyperView results - Surface average contact pressure from results
Hello everybody, I open this discussion in order to have more information about the HyperView results analysis. In detail I performed a contact analysis with OptiStruct (through SIMLAB) and I would like to calculate the average Pressure (or other quantity) for a surface of the body. First of all I cannot understand if I…
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CZM different results with same adhesive problem
Hi everyone, I'm having some issues using Cohesive Zone Modelling in HyperMesh OptiStruct. I’ve run two simulations using exactly the same adhesive (same stiffness parameters, damage initiation, and damage evolution), but with slightly different Single Lap Joint geometries. One of them, as shown in the attached second…
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ERROR #4966 simulation Hypermesh Optistruct
Hello, I'm getting this error when running my simulation. *** ERROR # 4966 *** Minimum time increment reached, analysis aborted. I do not know how to solve this problem. I have attached the .hm file. Appreciate any help thank you