-
When Exporting to Optistruct in Hypermesh, How to keep components in optistruct file?
There are many components in hypermesh. After exporting to Optistruct, Components shrink to limited numbers of property. I don't know how to keep the components in optistruct. Thanks YJ
-
Interpretation of Bolt Loosening and Failure in Nonlinear Simulation (OptiStruct)
Hi I’m performing a nonlinear structural analysis in Altair OptiStruct for an automotive assembly containing several bolted joints. Each bolt is modelled using 3D solid (hex) elements, and contact interactions are defined between mating components. The analysis includes two sequential load cases: Assembly Load (Bolt…
-
HPC OS job failed due to Maxwall time..can i restart from the failed job?
Hello, HPC Optistruct job failed due to Max wall time given less. can i restart from the failed job? its almost 98% completed and failed due to max wall clock time reached. Thanks in Advance.
-
rubber thermal analysis
My current requirement is to analyze the thermal deformation and stress of an entire rubber material structure when its temperature decreases from the initial 100℃ to 50℃. However, I found that the resulting contour plot from the analysis shows zero values, which suggests that the coefficient of thermal expansion is not…
-
Damping in Optistruct.
Hello, In an OptiStruct model where both PARAM,G and SDAMPING cards are defined, how does the solver determine which damping method to apply during a Modal Frequency Response (MFREQ) analysis? What is the interaction between these two damping definitions in this context? Thanks,
-
Element quality between Nastran and Optistruct
Hello. My client provided me with a mesh that was run with Nastran. When I run it with Optistruct, my calculation fails because some elements of my mesh don't meet the meshing criteria. This is strange, as the Nastran calculation works. The meshing criteria seem different and more restrictive with Optistruct. With the…
-
Modal participation for other directions than the main rigidbody directions
Hello all, There is the EFFMASS tool in hyperworks: PARAM, EFFMAS I am wondering if there is a way to modify the vector v in to have the modal participation for other cases (since my structure is to be excited via the connections to another structure, rather than the general free body directions). Thank you!
-
Compute Console (OptiStruct) Batch Mode Execution & Process Termination via Batch Mode
Hi folks, I'm working on automating OptiStruct runs in batch mode. I’m using the following command to run the solver: "Solver_path.bat" "Fem_file_path.fem" -core IN -nt 1 -np 12 Can someone confirm if this is the correct format? Also, is there a recommended way to kill the running Compute Console (OptiStruct) process via…
-
Maintaining Bending Plastic Deformation in Hypermesh
Hello, I am working on a simulation to look at the resultant deformation of a part after a bending load is applied. For simplicity, it can be thought to be a fixed-free cantilever. I am applying a load that should exceed the yield stress of the material, but when I release the load I want the part to maintain the resulting…
-
Modal Frequency with PCOMPG and PCOMPLS
Hi, I have to analyse a Al sandwich composite deck of 700mm*700mm. For this, 1. I modeled deck with shell elements and assigned PCOMPG property with 3 plies 2mm Al face sheet + 60mm Honeycomb Core + 2mm Al face sheet. 2. Observed modal Frequency with BC at center of plate is around 600Hz. 3. Later i have to mount a…
-
Several questions about Motionview
The first question: Regarding impact contact, for example, if I have two rigid bodies stacked up and down, and I set up impact contact, but I find that these two rigid bodies will produce contact vibration, that is, one rigid body will bounce up and down on the contact surface of the other rigid body. How can I quickly…
-
ERROR #606 Element 253026 references PCOMPG 2 without being included in any STACK.
I am getting the following error message: *** ERROR # 606 *** Element 253026 references PCOMPG 2 without being included in any STACK. but when I check the element, it says that it is referenced by a PCOMPP card. I also have the element under a shape that is referenced in a laminate. What should I check/change?…
-
Unable to convert Hypermesh model with Optistruct profile to Radioss
While trying to convert the Hypermesh Optistruct profile model to Radioss profile , iam getting this error 2. Earlier, i was able to complete the work in Radioss profile, but whenever i reopen the model it used to be in optistruct profile even though saved in Optistruct 3. Now when i open the above model iam getting the…
-
EDEM flexible surface
Hello, everyone in the community. I currently want to do a flexible model of corn leaves ( in line with the actual physical behavior, such as bending ) in EDEM, as if hypermesh and EDEM co-simulation can be done. Do you have this information ?
-
Some confusion in Craig chang contact flexible body in Motionview
In Motionview, CBC's flexible body can be set for contact calculations with the flexible body. Now I see two settings below (including contact models at rigid nodes, as shown in my screenshot), but I have looked at the help documentation and don't quite understand how to set them up. Assuming I have a bearing, how should a…
-
Tie contact data field #4 is incorrect
What does this mean and how do i get to the dialogue to fix this? I got the following error message: {C:\PROGRA~1\Altair\2024\common\tcl\tcl8.5.9\win64\bin\tclsh85t.exe} C:/PROGRA~1/Altair/2024/hwdesktop/../common/acc/scripts/hwsolver.tcl {N:/Supermidleage/Tub FEA/087464_B_1-087464-V16_Tub_1.fem} -screen -dir -solver OS…
-
MDS 2022 & OptiStruct 2022 Co-Simulation Stuck Reading Fiber Orientation File
Hello everyone,I’m working on short fiber injection molding co-simulation using Multiscale Designer 2022 (MDS) and OptiStruct 2022. So far, I’ve successfully generated the multiscale material model file (mdsMAT1.dat) and the fiber orientation file (mdsFiberOri1.dat) via MDS. Additionally, MDS outputs the…
-
Issue regarding 0D spring elements
Hello, On hypermesh, when using a 0D spring element to model an elastic articulation between two pieces, it happens that the two pieces are always linked rigidly. It looks like the 0D spring element is not taken into account in the simulation. I tried for example to set a very low stiffness in the PBUSH property. Then I…
-
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.
-
what are the difference between coupled solution and the structural solution with mapped temperature
I noticed that the results from the same models with coupled solution and the structural solution with mapped temperature and pressure are different(from pdf of heat transfer analysis training), is it because that within the coupled solution, the displacements of the model will be sent to flow solver to recalculate the…
-
Best workflow to simulate a free-free modal test with soft springs in HyperMesh
Description: I am moving from a free-free modal analysis to a configuration that should represent a free-free experimental modal test setup. I want to support a plate using very soft springs at its nodes, so the model is held in space but still behaves almost as free-free. My idea is: • the springs should act normal to the…
-
optistructure (2019) runs only if just one cpu is used
Hello all, i got the following message if i use more than 1 cpu to run my frequency analysis (EIGA). =================================== = BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES = PID 62682 RUNNING AT dex800-002.hpc.local = EXIT CODE: 9 = CLEANING UP REMAINING PROCESSES = YOU CAN IGNORE THE BELOW CLEANUP…
-
Anisotropic Damping Material
Hello, I'd like to know if it is possible to create an anisotropic damping material in OptiStruct, similar to MAT9OR, but with different GE (structural damping) values in each direction. Best regards, Eduardo Miorelli Rech
-
How can the weld behavior be captured as accurately(static analysis),as its fails on throat
In the L-joint, the connection modeled as node-to-node between 6 mm( vertical)and 4 mm(horizontal). However, in the actual structure, only the 3 mm weld is present at the joint. To better represent the weld behavior without modeling it in 3D.what should i do ?
-
Analysis and Optimization of an Automotive Cradle using Single Finite Element model with Multiple At
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
