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Rahul Ponginan

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About Rahul Ponginan

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  1. HOW TO RUN COMPOSE NOTEBOOK: Find the Compose_Jupyter.bat located at the Compose installation folder (default location for version 2019.4 is C:\Program Files\Altair\2019.4\Compose2019.4) and double click it. This operation will launch the Notebook. HOW TO OPEN AN EXISTING COMPOSE NOTEBOOK FILE (.ipynb): All the .ipynb files MUST be located in this location: \Documents\ComposeNotebooks Just click on File->Open Notebook and select the .ipynb to be opened. ABOUT THIS NOTEBOOK: This is a Compose Notebook version of the "System Dynamics and Controls Using Altair Compose" which can be downloaded at https://web.altair.com/system-dynamics-and-controls-using-altair-compose. Before running it the first time, copy&paste all the .ipynb files in the right directory, as explained in HOW TO OPEN AN EXISTING COMPOSE NOTEBOOK FILE (.ipynb). You can navigate to all chapters by opening CONTROL_SYSTEM_LIBRARY_1.ipynb. FURTHER INFORMATION: Compose NOtebook is availabe from Compose 2019.4. It gets installed automatically installing Compose2019.4
  2. Internal pressure generates tensile hoop stress for open cylinder and bi-axial in-plane tensile stress for closed cylinder. So it stabilizes the cylinder, it will not buckle. In ESAComp, internal pressure is defined as negative pressure. In the load specification, there is a check box for “pressure vessel” option. When checked, also axial load is set which mimics as the cylinder would be closed. You have to notice that when you perform buckling analysis with load vector {F}, that always -1 x {F} is also considered. Let’s say that {F} represents internal pressure. In this case, there is no stability issue. But the eigen value problem is also solved with -1 x {F}, which corresponds to external pressure and then you have solution. In this case the load factor is indicated with negative sign. If you want to consider the stabilization effect of the internal pressure in ESAComp, then you have to use geometrical nonlinear analysis. Under the ESAComp program “Document” -folder, you’ll find ESAComp Example Cases.pdf. There are plenty of cylindrical shell related case studies. All related ESAComp projects are under Demo-cases.
  3. Good morning Mrs/Mr, I downloaded ESAComp last week in order to study the buckling of simple structures during my internship with Arianegroup and have been struggling with one point. I started with very simples cases such as steel or aluminium cylinders (1 layer, no composite) and the results in buckling are coherent with my theoretical expectations. However, when I started to add an internal static pressure to my cylinder, the results went wrong (RF_1= 0,01 for example). I have no idea how to simulate the buckling of a cylinder with a static internal pressure. I used my previous cases of simple cylinders in steel or aluminium and filled in an external pressure in kPa in the tab for load parameters. Then, I ticked “Pressure Vessel” and ran the simulation. Should I put a sign minus in front of the pressure to indicate ESAComp the pressure is internal? I tried and the RF_1 becomes negative. Should I enter operation conditions ? I filled a min and max pressure (1 atm) and the results didn’t seem to change. Is the pressure inside the cylinder static? If not, how can I simulate the buckling of a cylinder with a static internal pressure? I didn’t find any tutorial or answer on the net nor on ESAComp examples. I hope you will be able to help me. Thank you for your answer.
  4. HI, You can request for the free Altair student edition here - https://studentedition.altair.com/
  5. are there special characters in the name in the save field - https://forum.altair.com/topic/38100-optistruct-solver-view-doesnt-show-up/ Or while running the file the .fem extension was not added in the save field perhaps? Or the full version HyperMesh was installed and activated with the student edition license so solvers wont be in there Or the files are in a read only folder, - https://forum.altair.com/topic/21562-analysis-optimization-dont-start/
  6. Have you considered simsolid, which can analyse complex geometries like body parts without any need for meshing?
  7. The objective of the forum is to have public technical discussions for the benefit of all users, private messaging is hence disabled.
  8. Users of Feko need to update to 2019.3 using the Update Tool in Feko launch bar to be able to use the new Component Library feature: You can do this by clicking on the “Check for updates” in Feko Launch bar. Once updated to 2019.3, launch the Component Library in CADFEKO from the menu toolbar:
  9. https://forum.altair.com/topic/38225-important-update-regarding-the-recent-help-outage/
  10. Hello, Recent versions of the Inspire and Inspire Cast help are no longer accessible from the product due to a web server upgrade. Inspire Cast versions 2019.1 through 2019.3 are impacted as they do not include locally packaged help as part of the installation. New version of Inspire Cast 2019.3.1 that fixes the issue are now available on the solidThinking Portal, Altair Connect, and Altair University: solidThinking Customers Inspire Cast 2019.3.1 Altair HyperWorks Customers Inspire Cast 2019.3.1 Altair University Customers Inspire Cast 2019.3.1 More information, including links to online help and offline help packages for the affected versions, is available here. You have received this email because you have downloaded a recent version of Inspire or Inspire Cast. We apologize for any inconvenience. Thank you for your patience. Warm regards, The Altair Inspire Support Team
  11. Hello, Recent versions of the Inspire and Inspire Cast help are no longer accessible from the product due to a web server upgrade. Inspire versions 2019.1 through 2019.3.2 are impacted as they do not include locally packaged help as part of the installation. New version of Inspire 2019.3.3 that fixes the issue are now available on the solidThinking Portal, Altair Connect, and Altair University: solidThinking Customers Inspire 2019.3.3 Altair HyperWorks Customers Inspire 2019.3.3 Altair University Customers Inspire 2019.3.3 More information, including links to online help and offline help packages for the affected versions, is available here. You have received this email because you have downloaded a recent version of Inspire or Inspire Cast. We apologize for any inconvenience. Thank you for your patience. Warm regards, The Altair Inspire Support Team
  12. Do you use a student edition license file that is many months old? if so please request and use the latest license file.
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