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Results Post Processing using MSC.Acumen

Results Post Processing using MSC.Acumen. Francis BARREAU - Snecma Moteurs Antoine SOEIRO - MSC.Software. Acumen Résultats. It is an application developed by MSC.Software for Snecma Moteurs. It is developed using MSC.Acumen.

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Results Post Processing using MSC.Acumen

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  1. Results Post Processing using MSC.Acumen Francis BARREAU - Snecma Moteurs Antoine SOEIRO - MSC.Software

  2. Acumen Résultats • It is an application developed by MSC.Software for Snecma Moteurs. • It is developed using MSC.Acumen. • It allows post processing of the results calculated by Samcef (main mechanical analysis program at Snecma Moteurs).

  3. Why Acumen Résultats ? • Post processing with Patran : • is adapted for all type of results, • allows a great variety of displays. • But : • It remains complicated to use, especially for an inexperienced user. • It is not easy to automate some displays. • It is missing some essential functions like units management. • It allows to obtain different values depending on the options chosen. Which value is the right one ?

  4. Why Acumen Résultats ? • Acumen Résultats allows : • To display results calculated with Samcef. • Simplification of post processing tasks by offering an easy-to-understand Graphic user interface even for an inexperienced user. • Display of results in a reliable manner : to get only the right values. • Automatic chaining of different Patran commands to get a complex display. • Automation of some post processing. • Addition of some missing functions (managing units) or improvement of existing ones ( titles, XY plots).

  5. Acumen Résultats menus Main buttons. The different steps of post processing. Selection area. Input area. To go to the next or the previous step. Icons box.

  6. Step 1 : to get the finite element model. • “Wizard” like user interface. • Acumen start. • User identification. • Selection of the MSC.Patran database. • Finite element model definition. • Immediate start of post processing or loading of Samcef Results. • Other choices : • Units used for calculation. • Units for display. • Language for the titles. • Make use of the HTML report.

  7. Steps 2 and 3 : utilities functions. • Step 2 : managing the model. • Managing groups and lists to display results on a part of the model. • Managing the coordinate systems used to display results. • Managing the viewport. • Step 3 : managing results. • To rename or delete existing results. • To create new results by linear combination. • To create new results by calculating the maximum, the minimum, the average of a set of existing results.

  8. Step 4 : displaying results. To guide the user in order to get the display.

  9. Step 4 : displaying results. • Only to allow options that correspond to the finite element model, the result quantity and the display. Examples : • To display 2D tensors only for 2D models. • To display a deformed plot only for displacement results. To display a vector plot for all types of vector results (displacement, loads, … ). • To display the results on the top, middle and bottom surface only for shell models.

  10. Step 4 : displaying results. • To automatically select the Samcef result “code” number which correspond to the result quantity to display. Example : • Shell model. • Stress display. • Average stress at the center of the elements. • Top surface stresses. • Von Mises stresses. • Result « Code number » Samcef : 3431.

  11. Step 4 : displaying results. • To propose simple choices for the element results display : • To display the average value at the center of the elements. • To display an extrapolated value at the element nodes : • With discontinuities at the nodes. • With an average at the nodes. • With the largest difference of the values at the same node : this will help the user to check the quality of his calculation. • Example : for the average value at the center of the elements : MSC.Patran / Results equivalent options :

  12. Step 4 : displaying results. • To merge a set of different Patran commands into one Acumen display. Examples : • Image captures with an automatic switch between black and white background colors. • XY Plots with automatic scaling and titles. • Stress tensors having traction values with a red arrow and compression values with a blue arrow.

  13. Step 4 : XY plots • Automatic titles. • Element, component, local coordinate system used. • Automatic axis title : result displayed, units. • Automatic axis scales with “whole” values. • Automatic curve color and style.

  14. Patran : Results : Create / Marker / Tensor. Results : Select Result Case(s). Results : Select Tensor Result : « Code 3411 ». Results : Show As : « Principal ». Results : Show as Spectrum. Spectrum : Create : 3 colors : black, red, blue. Results : Show Tensor Box : scale = 0.0. Results ; No tensor Label Results : Average Domain : None. Results Average Method : Average / Derive. Results : Extrapolation : Shape fn. Results : Apply. Ranges : create : 2 values. Ranges : Fit results and Calculate. Ranges : From/To : 0.0 for intermediate values. Ranges : Apply. Ranges : Assign Target Range to Viewport. Set Range : don ’t overwrite range values. Results : Apply. Acumen résultats : Spatial post processing. Result selection. Stress display. On 2D elements. Average stress at the center of elements. Tensor display. Display options : no label. Step 4 : tensor display.

  15. Step 4 : displaying results. • To display results in reliable manner : to show only the relevant values. • Example : fringe plots of von Mises stresses at the center of the elements. Maximum value displayed : • Patran : • 2 « codes résultats » Samcef available (3411 ou 3310) x 2 « Averaging Domain » (« None » ou « All ») : at least 4 different maximum values can be displayed. • Acumen Résultats: • Automatic selection of Samcef « result code » 3411 and automatic choice of the display options : one maximum value is displayed in accordance with Snecma Moteurs’ post processing methods.

  16. Step 5 : reproducing results. • To automatically reproduce the current display on other results : • Superimposed plots of deformation and stress fringe. • Image and animation capture. • To repeat the current display with different result units or title language. • To insert the current display into an HTLM report.

  17. Step 5 : reproducing results. • Example : modal calculation with stresses. • Goal : to display the deformation and the von Mises stress fringe for all the modes and to capture all these images. • First part : step 4 : create this display for the first mode. • Second part : step 5 : reproduce this display : • Possible change of the units. • Select the modes to display. • Validate : Acumen does the plot and capture for all the selected modes.

  18. HTML report. • Description of the model. • Description of all the modifications of the results. • Automatic insertion of all the graphic outputs.

  19. Conclusion • MSC.Acumen has allowed us to create a new application for post processing Samcef results. • At least, 95% of Snecma Moteurs’ needs are fulfilled. • Post processing is now simpler, more reliable and can be automated. • A new application for defining Element properties, loads and boundary conditions for Samcef calculations is being developed by Snecma Moteurs and MSC.Software.

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