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 random vibration?

Product/Topic Name :

How to use ESLM correctly in OptiStruct software

*Note from Community Team - Once you receive a satisfactory answer on your question, kindly mark your answers as "Accepted" so it can help others with similar problems. Thanks.

I want to create custom checks in Hypermesh i.e to add more check points in HyperMesh Model Checker. 

I see this is possible with newer versions of HM. I can make some generic checks but I would like to use TCL check option. 

Does anyone have experience in making custom checks to check their decks with TCL check option. 

Any leads would be very helpful.

Thanks in advance !!

Any help would be greatly appreciated.

Thanks

Wonder is that a way to define contact surface in flux for heat transfer, if my element node is not equal on the surface?

Thanks,

Jerome.

I hope this message finds you well. I am currently working on simulating an aluminum bar with following dimensions: radius=5.642mm and length=200mm (see attachment 1). The simulation is conducted in Flux 3d, using magneto harmonic application, with a low voltage 2v ,50Hz (see attachment 2).

However, l am facing an issue with the inductance calculation regardless the method used the (energy, or impedance..),the calculated the inductance value consistently remains at 0.12uh, which is lower than the expected exact value is 0.14uh, despite mes efforts, I have been unable to optimize the simulation further.

I am reaching out to the Altair community in the hope that someone  with expertise in electromagnetic simulation can provide assistance or validation of for this model. I am in a times sensitive situation and any guidance or validation would be greatly appreciated.

Thank you very mush for  your time and consideration.

Sincerely

Sam

I have simulated an aluminum conductor bar as shown in the attachment, powered by a low current source at a frequency of 60Hz similar to the circuit in the attachment. However, the inductance value is consistently lower than the  exact value. Can anyone please help me with this?

​Wheel model with tire and rim separation during crash and tire deflation

This model presents the modeling and feature to model monitored volume with possible deflation.

Usage/Installation Instructions

HyperMesh,Radioss, HyperView and HyperGraph

Is there any way to extract the data from  { Message " "} command to a Excel sheet in hypermesh 2019/2020 ?

Here you will find the source code which corresponds to the built-in version of the EDEM Hertz-Mindlin with JKR V2 contact model.  This is based on the EDEM 2020 implementation of the contact model. 

Note this model uses the legacy OpenCL GPU implementation.

Pre-Requisite

For information about compiling EDEM API Models please see:

https://community.altair.com/csm?id=kb_article_view&sysparm_article=KB0037690

or the EDEM Help:

https://2022.help.altair.com/2022.2/EDEM/Programming_Guide.htm

More EDEM and EDEM API Tutorials can be found here:

https://community.altair.com/community?id=community_blog&sys_id=5e7dc459979de950e3b0361e6253afae

Usage/Installation Instructions

Example API files can be found in the attached .zip

I am busy working on some beam-bending calculations in ESAComp. Compared to my hand calculations, the EI_y value from ESAComp was different. On further investigations, it seems ESAComp is doing E^f_x * Iy while I am doing E^f_y * Iy.

My understanding was that the flexural terms the 2.5D analaysis generates are felxure about their sub-script axis, therefore I have been using E^f_y as for a beam with a cross-section in z-y and lenght along x, this is the flexure term I need when applying a load at the end of the beam along z.

I know the likelihood of ESAComp being wrong about this calculation is low, but if that isn't the case, could someone please explain why using the E^f_x term is correct when the beam would not be bending about the x-axis?

Best,
Andreas

I stating to use the Embed to generate automatic code for STMicroelectronics. I would like to know how to use J-Link or ST-LINK-V3 in an Embed? I can just use the ST-LINK-V2 at this moment.

Thank you!

I have a model which presents me with the following....

"MUMPS failed in factorization because the run-time memory
requirement was larger than the estimated amount. Solver will
retry with a larger memory relaxation coefficient"

Am trying to understand if this is an issue or not (is the model being slowed, but a simple command/parameter will improve matters). My run command is "-core IN -checkel NO -out -np 8 -ddm"

The PC is an I9-9980HK with 8 cores (hyperthreading off) + 128GB ram. 

I wanted to tell you that I've managed to activate my Altair license. Most of the programs, like Inspire, are working fine now. However, ESAcomp still shows an error (code 9) indicating it can't find the necessary features. I've followed the steps indicated for the student license, but unfortunately ESAcomp still isn't working. Do you have any suggestions or recommendations to resolve this issue?

Regards,

Gorka

The error:

Altair License Manager. License error.
Features: GlobalZoneEU, HyperWorks, HWESAcomp
Error code: 9
Error description: Features not found
License path: C:/Program Files (x86)/Altair ESAcomp 2020/altair_lic.dat

A set of bulk data for Optistruct, to produce the same flexible body (CMS method) with different contents (different size).

Usage/Installation Instructions

The attached zip, contains an example of Rod, defined with a 3D mesh elements (tetra) and different options to visualize at different level of details the results.

Each model is usable for multibody purposes (MotionView & MotionSolve) and produce same results (if not used for flexible contacts).

The models are related to KB0124385 How To article.

I suspect there may be an ordering (i.e., indexing) problem, for example, the current values are stored at the wrong triangle index. Regarding the difference in magnitude for the purely conductive and dielectric sphere cases, this doesn't occur if you output the currents via the LUA DataSet: ExportMatFile() function, which unfortunately doesn't work for composite designs in FEKO 2020.0. Perhaps this is a consequence of the same bug?

The LUA code:

app = pf.GetApplication() app:NewProject() app:OpenFile([[path_here\coated_sphere.fek]]) -- Set up the file details absPath  = [[path_here\]]  -- HIGHLY recommended to hard code the absolute path! meshfile = "coated_sphere_sol.txt" -- Find all possible data files names = pf.SurfaceCurrentsAndCharges.GetNames() --Get characteristic mode model currents currents = pf.SurfaceCurrentsAndCharges.GetDataSet(names[1]) --Load a given model sConf = app.Models["coated_sphere"].Configurations[1] --Import the mesh mesh = sConf.Mesh count = mesh.TriangleFaces.Count --Number of Triangles --Get mesh values points = mesh.Points --I/O for mesh write upper-- Open a file to write to. file = io.open(absPath..meshfile, "w") --Create Column Headers Vertice Index - Position(X,Y,Z) colHeader = string.format("%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s\n", "Frequency", "Element","X", "Y", "Z", "real_Jx", "realJy", "real_Jz", "imag_Jx", "imag_Jy", "imag_Jz", "real_Mx", "real_My", "real_Mz", "imag_Mx", "imag_My", "imag_Mz") --Write Column header to file file:write(colHeader) -- Get vector of all solved frequencies frequencies = currents.Axes[1] for c = 1, #frequencies do         str = ""         elementNum = 1         pointCount = 1         for i = 1, count do             --Load mesh triangle             triangle = mesh.TriangleFaces[i].Triangles             count2 = triangle.Count --Number of triangle vertices               for j = 1, count2 do             info = triangle[j].VertexIndices                                          -- Pre-Allocate Center of Triangle Value for ouput              -- Electric Current             real_Js_x = 0             real_Js_y = 0             real_Js_z = 0             imag_Js_x = 0             imag_Js_y = 0             imag_Js_z = 0                          -- Magnetic Current             real_Ms_x = 0             real_Ms_y = 0             real_Ms_z = 0             imag_Ms_x = 0             imag_Ms_y = 0             imag_Ms_z = 0                          -- Element Centroid             centroidx = 0             centroidy = 0             centroidz = 0                          for ii = 1, #info do                                                    -- Get vertice location                 position = points[triangle[j].VertexIndices[ii]]                 -- Add to centroid                 centroidx = centroidx + position[1]                 centroidy = centroidy + position[2]                 centroidz = centroidz + position[3]                                  -- Add Electric Currents                 real_Js_x = currents[c][pointCount].ElectricX:real()                 real_Js_y = currents[c][pointCount].ElectricY:real()                 real_Js_z = currents[c][pointCount].ElectricZ:real()                                 -- Imag component                 imag_Js_x = currents[c][pointCount].ElectricX:imag()                 imag_Js_y = currents[c][pointCount].ElectricY:imag()                 imag_Js_z = currents[c][pointCount].ElectricZ:imag()                                      if currents[c][pointCount].MagneticX ~= nil then                 -- Add Magnetic Currents                 real_Ms_x = currents[c][pointCount].MagneticX:real()                 real_Ms_y = currents[c][pointCount].MagneticY:real()                 real_Ms_z = currents[c][pointCount].MagneticZ:real()                                 -- Imag Component                 imag_Ms_x = currents[c][pointCount].MagneticX:imag()                 imag_Ms_y = currents[c][pointCount].MagneticY:imag()                 imag_Ms_z = currents[c][pointCount].MagneticZ:imag()                 end                 -- Move to next vertice                 pointCount = pointCount+1             end                              -- Format average values as string              str = string.format("%15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G %15G\n",                                                 currents.Axes[1][c],                                                 elementNum,                                                 centroidx/3,                                                 centroidy/3,                                                 centroidz/3,                                                 real_Js_x/3,                                                 real_Js_y/3,                                                 real_Js_z/3,                                                 imag_Js_x/3,                                                 imag_Js_y/3,                                                 imag_Js_z/3,                                                 real_Ms_x/3,                                                 real_Ms_y/3,                                                 real_Ms_z/3,                                                 imag_Ms_x/3,                                                 imag_Ms_y/3,                                                 imag_Ms_z/3)                                                  -- Print to file             file:write(str)                          -- Move to next triangle in solution             elementNum = elementNum + 1         end     end        end --Close the text file file:close() --return currents 

Thanks!

can someone share link for Inspire play 2020

I have to do some verifications and it would be very convenient to be able to import the geometric model into hyperview!

Unfortunately, despite having transformed the geometric model into .H3D format, some geometries such as lines and points are not transformed! (e.g. axes of joints).

Do you have a solution to this problem? Is there a different possibility to import a geometry into hyperview? Only H3D ...?

Thank you for any answers 

Can anyone help me to create 2D mesh for the selected car bumper and also teach me on how to get the mesh right? i included the model in STEP format. thank you so much.

As per the above title, currently I have problem with my Hyperwork OptiStruct analysis. I hope I can get answers to my problem here as soon as possible. I also attached the picture and the zip file of my problem.

I am trying to design a synchronous machine with salient poles in FluxMotor, however it seems not possible to do it directly. Is there a way to make the airgap variable, maybe by using extension with other softwares ?

Thanks for your assistance and consideration.

Best regards,

Baptiste Chantre

I am new to TCL script. I am trying to create a TCL script to isolate 2D element in assembly with a pop up having "Proceed" button to proceed further in a script.

Objective is : If user runs the script, script will isolate 2D element with a pop notification. This will pause the script and user can see the 2D elements in workspace. If user clicks the" proceed" button, script will proceed further. In case, if user clicks "Cancel button", script will terminate.

I need to add a "Cancel" button along with "Proceed" button in below script. Can anyone help me in this?

proc Isolate2D {{opt all}} {
    *displaynone
    *createmark elems 1 $opt
    *createmark elems 2 "by config" tria3 quad4 tria6 quad8
    *markintersection elems 1 elems 2
    if {[hm_marklength elems 1]} {
        *findmark elems 1 0 1 elems 0 2
# This procedure creates a popup that pauses the script execution
proc pauseScript {} {
    # Create a toplevel window
    toplevel .pause
    wm title .pause "2D Elements"

    # Create a label with instructions
    label .pause.label -text "2D Elements Exists. The script is paused to check. Please rotate the model in workspace to isolate 2D.

     Click Proceed to continue."
    pack .pause.label

    # Create an OK button that resumes the script
    button .pause.ok -text "Proceed" -command {
        # Destroy the popup window
        destroy .pause
        # Set the pause variable to 0 to resume the script
        set ::pause 0
    }
    pack .pause.ok

    # Set the pause variable to 1 to pause the script
    set ::pause 1
    # Wait for the pause variable to change before continuing
    tkwait variable ::pause
}

# Main script execution starts here
# Call the pauseScript procedure to pause the script
pauseScript
    } else {
    Message "No 2D elements";
    }
    *clearmark elems 1
    *clearmark elems 2
}
Isolate2D

I am new to TCL scripting. In HM workspace, the model is having different element types such as S3, S4, C3D4,C3D6,C3D10M and so on.

 I have planned to created script to isolate element based on element type (ex. C3D10M) as a practice session. But having no idea how to proceed further. Can someone help me

Regards,

SRV

1) How to improve run time how to increase number of cores in the solver  ? 

2) How many number of tokens are assigned per core? 

BASICS

In this video we provide an introduction to the basics of hydraulic simulation in Activate.  After watching this video you will have an understanding of the basics which will prepare you for the other sections within this course.

FIRST MODEL - CYLINDER DRIVE

In this video we look at a practical demonstration of setting up a hydraulic model.

VALVES

In this video we look at valves in hydraulic simulations.

CO-SIMULATION

In this video we will review the steps for preparing a co-simulation using MotionView and Twin Activate.

You can also go through this eLearning in the Altair Learning site and get the necessary files to follow along.

For more tutorials, videos and blogs click here.