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TUTORIAL 4 POST-PROCESSING

TUTORIAL 4 POST-PROCESSING. Note: As in the other tutorials, all menu items that need to be selected will be preceded

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TUTORIAL 4 POST-PROCESSING

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  1. TUTORIAL 4POST-PROCESSING

  2. Note: As in the other tutorials, all menu items that need to be selected will be preceded by a maroon right arrow: >User action. Mouse buttons are indicated as follows: -- 1B = First (left) button -- used for selecting items-- 2B = Second (middle) button -- used for "OK"-- 3B = Third (right) button -- used for View Manipulation & pop-up menusNormally 1B is used, unless otherwise. Table Of Contents SectionPage Step1. Import Nastran Deck. 3 Step2. Read Result File. 5 Step3. Explore functions in Results Viewing Gizmo 6 Step4. Display results as fringes and set fringe scale 7 Step5. Change results type displayed from Collection block. 9 Step6 . Superimpose multiple load cases 10 Step7 . Add linear combinations of load cases 11 Step8 . Display results in multiple canvases 12

  3. Step1. Import Nastran Deck. • Launch MSC.SOFY according to your local configuration. Select >NASTRAN mode from entry screen. • You'll be importing a NASTRAN deck and a corresponding results file from a NASTRAN run. • Let's first set the I/O options to insure proper importing of entities. • From Top menu bar> select >Options >I/O Options>NASTRAN Opts >Input Options. • In the dialog box, set your input options as shown below. • Now set the units to match the file being imported: Select >Options menu >Units Mgr. • In the Units Manager dialog box: Select >Standard Units button which brings up another pop-up with several choices of units. • Choose >NASTRAN (with WTMASS=.001 card) >OK. h d

  4. Step1. Import Nastran Deck. (Cont’d) m • Now to import the NASTRAN deck: Select >File menu >Import >NASTRAN. • In the dialog box "Select Nastran file to merge" navigate to the file .../DEMOS/Tutorials_NASTRAN/ Tut_N4_Rr_End_Post-process.nas • Click >Open. • Watch the message area at the bottom for any error messages. • When complete, you should have the following model on the canvas. • In Collection block> change >Type to >BC Sets. • Click >All Off button. • Check the box >ID's to display the BC Sets in order of Set #. • Click on/ off the loading conditions (ID's 5, 6, and 7) to become familiar with the load cases. • To further query any BC Set, Use >Utilities >Identify command to locate and view magnitudes of applied forces. • In View block>Right Rear. • Use >Organize command to >Keep the Rear End Panel and striker parts, as shown. t n

  5. If a .bir file is not available, it can be created from a Punch file by executing the following command from a "Run" or terminal window: NasPun2SofBir.exe Step2. Read Result File. Read in the corresponding Results file as follows: • From top menu bar> select >Results >Read Results File. • In the dialog box, navigate to the file ..../DEMOS/Tutorials_NASTRAN/ N-5_Rr_End_Post-process.pch.bir • Click >Open. • The results file is processed and the Results Viewing Gizmo launched automatically, along with a Clone of the Collection block, with >Type set to >Post-Process. • By default the Displacement Magnitude is displayed in fringes for the first load case found. e d

  6. Step3. Explore functions in Results Viewing Gizmo • Activate the animation by clicking on the >forward arrow button in the Results Viewing Gizmo. • Note that View Manipulation and FE-Graphics functions remain available while the animation is running. • For example: 1. Change graphics to >Wireframe >then >Shaded mode. 2. Zoom in on an area of interest, 3. Use >Dynamic Rotation and >Pan to improve the viewing angle.

  7. Step4. Display results as fringes and set fringe scale b Now try some different options in the Viewing Gizmo: • Uncheck the box >Fringe On to see the animation without the color fringes. • Now check the box to set >Fringe On again. • Change the scale of the fringes by unchecking the >Auto Limits box. • Type in a new value in the >Max field. • To interactively change the fringes: Set a reasonable >Increment value> use >Up/ Down arrows to change the scale. • End by re-checking the >Auto Limits box. • Check the box >Node based, to view nodal (grid) values, rather than element-based values. f f

  8. Step4. Display results as fringes and set fringe scale (Cont’d) • Add the undeformed model to the display by checking the >Show Undeformed box (2nd row, on left). • Change the color of the undeformed model by clicking on the down arrow and select a color from the pop-up, perhaps >white. • Change the scale of the deformation by clicking on >Deformed Scale up/ down arrows. • Change increment of scale, as desired. • Click >Show Info button to add labels to the canvas with job name, subcase id, results type, etc. • Stop the animation by clicking on >Pause or >Stop button. • Go to the maximum displacement fringes by clicking on the >Go to Last Frame button (bottom row of playback buttons, second button from left). • Step through the animation, frame-by-frame by clicking the >Advance 1 Frame button. • Click >Play button to resume animation. • Select the >Increase animation speed button (double up arrows) and repeat until the maximum speed is reached. • Increase / Decrease the number of frames in the animation by clicking Up/ Down > #Frames. • Un-check the >Auto-Rev box and you see the animation progresses from the last frame immediately back to the first, without playing in reverse order. • Check the box again and note the animation progresses from first to last frame, then reverses and goes from last to first, and so on. • If the >Dynamic box is checked, the displacements are assumed to be fully reversed, with frame zero as the undeformed, and frame numbers going from negative to positive (e.g. -5 to +5). • With >Dynamic box un-checked frame numbers are all positive. (e.g. from 0 to 11) and displacements are shown in one direction only. h i

  9. Step5. Change results type displayed from Collection block. • Return to Collection Block (Type >Post-process), and change the results type being displayed in the fringes by clicking with (3B-right mouse) over >X displacements, for instance. • Expand the list by clicking on the + sign, next to the results type: Stress: Top, and select with (3B) >VonMises. • The results type showing in the fringes is now VonMises stress on top surface. • Un-check the box >Node-based to see element centroid values. • Now to get a bit more information about these results,: Select >Results menu >Query Results. • In Pick menu >select >All (elements) • Click >D (Done). • An Information Panel pops up with a summary of the results for the selection. • From the Max Stress value given, you can then pick an appropriate Max scale value for fringes. (say >200 for this example) • In Collection block> click >Next button, and the next subcase is displayed, with the same results type (VonMises stress). • Click >All Off button to clear the results. b h

  10. Step6. Superimpose multiple load cases. a • Now let's superimpose two results together. • In the Gizmo> check the box >Superpose On. Now under Case 1> select with (3B) >Displacement- X value. • Select with (3B) the same result type >Displacements- X value for Case 2. b c

  11. Step7. Add linear combinations of load cases. g • You can display linear combinations of subcases, similar to the SUBCOM card. • First click >All Off in Collection block to clear the results. • In Gizmo> uncheck >Show Info button to clear labels. • Click >Modify in Collection block. • You are prompted to "Select block/ data to modify.“ • Select >X Value (displacements) for Case 1. • In the pop-up>type in >2.5 for Multiplier> then >Change. • Now superimpose Case 1 and Case 2, selecting with (3B) >X value displacements for both Cases. • Check the box >Show Info again, and note the change in the labels. i

  12. Step8. Display results in multiple canvases. f You can open multiple canvases and have different results types and/or subcases displayed: • From top menu bar >Display >New Canvas. • To choose results displayed in any canvas, click anywhere in that >canvas to make it active. • Then choose results type from Collection block with (3B), for example, Displacement >Magnitude . • Click the other >canvas to make it active> select a results type for that canvas, perhaps Stress: Top >VonMises. • Click >Play button to activate the animation. • Note that only the active canvas is affected. • Note that graphics and views can be set independently in each canvas. • For example select >Wire frame for one canvas, and >Shaded for the other. • To Use playback buttons to control both canvases> click >All Canvases button in lower right corner of Gizmo. • Stop the animation and click >Go to First Frame button. • Now >Play to synchronize the two canvases. • Try different combinations of sub cases, views, and graphics in the two canvases to get a feel for the Results Viewing Gizmo. • Exit MSC.SOFY: >File, >Quit. (Don't save.) i

  13. Congratulations!!! You have just completed MSC.SOFY Nastran Tutorial 4.

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