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darad

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About darad

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  1. For further practice with bolted assemblies, a three-body STEP assembly was created for a Sprocket Drive in NX-IDEAS 6.1 (2004 version). This model is a spinoff of the Bolted Dome Assembly posted earlier. The slotted wheel section is a separate body, from the cylindrical section which is intended to be Joined to the wheel body. The sprocket and cylinder are adaptations of the dome and cylinder from the pressure box in earlier model, re-using bolt holes and pattern. For my simulation, the five mounting holes of the wheel were Constrained. A force of (6000, 4000, 0 lb) was applied at the fillet of one tooth as shown. The sprocket will be connected to the cylinder by 12 bolts. Your choice how to create. Manually create the flat spiders to washer faces (you create!), upward facing spiders near bottom of holes, and Bar elements connecting the spiders. Bolt Head creation, to automate creating the bolt head flat spider to washer face, and Bar element to the interface plane. Bolt Thread creation, to automate same for upward facing RBE2 and Bar element. I never succeeded getting this working, so they were easily created manually. Automated Bolt Head creation based on search of hole of size range, like the Altair demos, and same for Bolt Thread. Let me know if anyone gets the Bolt Thread feature to work, and how-to-do. I tried hard, and always failed with nothing displayed after the pop-up it had succeeded, and nothing new in the browser. Darryl Darryl SPROCKET_ASM.stp
  2. For practice with bolted assemblies, a simple three-body STEP assembly was created for a Dome Pressure Box. The base and cylinder are separate bodies. These can be Boolean or Join together for learning sake. Try the Boolean and learn to connect them as a single body with two volumes, and what that implies. Or Join the surface meshes and Remesh the interface, until a nice transition mesh is achieved. You may need to play with Mesh Controls on faces or edges for good transition. The domed body will be connected to the cylinder by 12 bolts. Your choice how to create. Manually create the flat spiders to washer faces (you create!), upward facing spiders near bottom of holes, and Bar elements connecting the spiders. Bolt Head creation, to automate creating the bolt head flat spider to washer face, and Bar element to the interface plane. Bolt Thread creation, to automate same for upward facing RBE2 and Bar element. I never succeeded getting this working, so quite easily created manually. Automated Bolt Head creation based on search of hole of size range, like the Altair demos, and same for Bolt Thread. Let me know if anyone gets the Bolt Thread feature to work, and how-to-do. I tried hard, and always failed with nothing displayed after the pop-up it had succeeded. The intention is to apply a 1500 psi internal pressure loading, e.g. a exploding device within, and compare stress contours in psi vis Simlab 2019.3. Bolts are 0.25" The solid assembly was quickly crafted in NX-IDEAS 6.1, with its superb and easy yet powerful modeler, but Windows updates may finally kill the great product. Darryl DOME_ASM.stp
  3. For new users, here's a simple STEP assembly of a solid welded block, with a round bar the user can attached as desired. With just four bodies, this assembly is a good way to practice and add to your skills. They are simple enough to try different techniques joining the bodies, or even b oolean. Here's an image on my practice model. The loop weld is joined to the base, block joined to the weld, and solid rod joined by MPC connection. The block is not joined by mesh to the base, as in the real welded part. The resulting stresses are shown for the same h3d file, for 2019.3 (left) and 2019.2 (right). There appears to be some difference in how the stresses are displayed for the two versions, but the queried stress is the same. Enjoy, and share and teach your newbies. Darryl TEST_SOLID_WELDED_BLOCK.stp
  4. Yes, feel free to use this simple model for Marketing Demo's, which I created in my own free time. Start to finish in 10 minutes.
  5. Just tried Boolean, CAD parasolid, Combine. Create connected bodies creates a single part, with one body for meshing. Help test implies it creates a single body with multiple bodies. If I volume mesh, the entire part is meshed. The help text implies a partitioning surface is created between the two bodies Boolean Combine. If I use cutting plane, the partitioning surface is visible in my simple model. But meshing is done across both volumes. How does one mesh each volume separately? What? Profile just upgraded from Beginner to Advanced in just 9 months from start? Xlent software.
  6. Related Question. Can one modify an RBE2 to RBE3, and vice versa?
  7. Three methods for display of prior 2019.2 MPa results in English IPS units, i.e. stresses in ksi, displacement in inches · Import 2019.2 fem into 2019.3 (prompts for prior units) and re-solve with IPS units · Import 2019.2 h3d model & results (prompts for prior units) into 2019.3, display in IPS units · Create entire model in Simcenter 3D in IPS units, export FEM and solve in Simlab/Optistruct I have done all three for a recent large model with near 50 bolted connections. Best is Option #2. #3 just for learning sake.
  8. For anyone desiring the above simple welded STEP Assembly for learning/demonstration, here's the STEP for the simple assembly. Better than demoing a monster transmission housing with a zillion features and dozens of bolted connections to impress (and intimidate). For the welded-blocks, its this simple. 2D mesh bodies Join weld loop to base Join block to weld loop Join arm to block, e.g. MPC or Join Note the block is nicely NOT joined to the base in the FEM (no need to detach and reconnected edges where needed) Slick process Remesh bodies to clean up the ugly mesh at interface 3D Mesh solid Mesh quality, compute, display, cleanup Parameters and Outputs Force and BC Load cases Data Check Solve Results The arm can be joined or MPC to the block, as desired for demonstration. The LBC browser can be used to great advantage to explain the process. One can demo and teach the entire process: import STEP to display results in 10 min. Another demo assembly might include bolted joints with washer faces via mesh control, bolt spiders, bars, etc. A way for new users to start quickly, and then delve into more detailed assemblies. STEP assembly created in NX-IDEAS 6.1 TEST_SOLID_WELDED_BLOCK.stp
  9. Uninstalled and reinstalled 2019.3, no Win7 restarts. Analysis menu displayed at top, miraculously. Appeared functional to re-analysis of simple welded block assembly below, easily created in NX I-DEAS 6.1 -- still a super product, though on its way out :>(
  10. Altair: How many successful install of 2019.3 within Altair on Windows 7? Users: Kindly welcome to contribute experience, or test, so this gets resolved. Maybe just DELETE Line with the dreaded Solutions ribbon which is causing havoc: <xi:include href="solutionwb.xml"/> I can this before re-installing 2019.3 (after big download), and gain Admin rights again.
  11. <xi:include href="analysiswb.xml"/> is present in ribbon.xml Hence, I'll need to download the 4GB install file again, and re-install. I am informed by Altair the Additional Files zip need not be present for a normal installation without the frills (I did have the zip in prior install) <?xml version="1.0" encoding="utf-8"?> <Root xmlns:xi=" "> <xi:include href="meshingwb.xml"/> <xi:include href="geometrywb.xml"/> <xi:include href="assemblywb.xml"/> <xi:include href="FeaturesWB.xml"/> <xi:include href="femwb.xml"/> <xi:include href="solutionwb.xml"/> <xi:include href="analysiswb.xml"/> <xi:include href="OptimizationWb.xml"/> <xi:include href="ResultsWB.xml"/> <xi:include href="boltmodelingwb.xml"/> <xi:include href="caderrorcheckwb.xml"/> <xi:include href="crankshaftwb.xml"/> <xi:include href="gasketwb.xml"/> <xi:include href="midsurfacewb.xml"/> <xi:include href="onepushmeshing.xml"/> <xi:include href="pipes_tubes_wireswb.xml"/> <xi:include href="powertrainwb.xml"/> <xi:include href="processautomationwb.xml"/> <xi:include href="trialswb.xml"/> <xi:include href="weldwb.xml"/> <xi:include href="electronicswb.xml"/> <xi:include href="popupmenu.xml"/> </Root>
  12. Many users will be badly affected if the LBC browser is deleted in favor of the Solution browser. I believe most users are just doing linear static linear analysis, and would not benefit from the Solution broswer, which hides too much. The very advanced multi-physics user might benefit from any streamlining with the Solutions browser. The current LBC browser is VERY easy to learn and use, yet very powerful in its functionality for easily turning off entities for modified Solve run. Please keep LBC browser forever. I had zero issue with LBC browser when first started last summer, and now I can really take advantage of its versatility, and has allowed me to progress very rapidly. No comparison to Hypermesh/Hyperworks X, which is a real struggle yet I have years of experience to many tools. Maybe Solutions browser looks slick for marketing demos. Recently I imported a Nastran bulk data model from another tool. The import default was to Create a New Solution, which I overlooked. This brought the user into the Solution browser, in which nearly all LBC relevant information was lost. Leaving me lost. I had to re-import the bulk.dat file, while UNCHECKING the Create New Solution default. I'm using 2019.2. I'd LOVE to migrate to 2019.3 for ability to change to English units for NEW models, but the Analysis tab does not appear on my Windows 7 install of 2019.3 (see my other post on 2019.3). Mgmt has been irked that my stress results are displayed in mPa, rather than psi. I have to relabel the plot scale with ksi units, waste of time and error prone.
  13. Another user showed proper Analysis menu for 2019.3 on Windows 10. So my Windows 7 installation is the exception here. We have licensing with Hyperworks Units. Sounds like the Student Version made 2019.3 quirky. Please resolve.
  14. Uh-oh, my PC runs Windows 7. Another user just installed on Windows 10, and the Analysis menu at top shows as customary. Any other users with Win 7 vs Win 10 experience to share? I informed altair support.
  15. No, header says Altair SimLab 2019.3. I have no current desire to use the new Solution menu. Only the old Analysis menu between FEM and the new Solution menu at top. How to make Analysis menu re-appear??? I've reset Preferences, System, and check View, Application with SimLab checked. .... I see a SimLab X at bottom of 3 item list! and deleted username... .Altair folder It seems we ought not mix up the Student Edition in this dialog, as the length explanation above is highly confusing to me. We have corporate license and tokens, and access to all Hypeworks product suite and Simlab. LG at local Altair office just verified what I am see (but they are not!)
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