femap_postprocessing

2-1

Exercise 12 – Result Evaluation and

Post-processing

© UGS Corp. 2006. All rights reserved.Femap with NX Nastran 2-2

Exercise 12a – PostProcessing with

Deformed Contour Plots

In this exercise, you will become familiar with

Specifying Deformed and Contour Styles.

Access advanced Post Processing options, including the use of the

View Options dialog box, and the Post toolbar.

Practice using the View, Advanced Post commands.




1. Open the file fanpost.mod.

a) Save the model in your exercises folder using the File, Save As

command.

2. Select the PostProcessing Data to Deform and Contour, and Specify

the Method Used to Contour the Results.

a) With the View, Select command (or F5), select Deform, and Contour for

the Deformed and Contour Styles.

b) Set the Output Set to 1..Distributed Pressure Load

c) Press the Deformed and Contour Data button to bring up the Select Post

Processing Data dialog box.

d) The results from the analysis of a model are organized into output

vectors that can be used as the data for the various displays. Select

Total Translation for the deformation display, and the Solid Von Mises

Stress for the contour display.


3. In the Select Post Processing Data

dialog box, press the Contour Options

button to modify the type of averaging

performed on the data to be contoured.

With the Contour Type set to Nodal, set

Data Conversion to Max Value so that

Femap will use the maximum corner

value at each of the nodes.

4. Press OK in all forms to display the

contoured and deformed model.

Note: You can use the difference in Maximum and Average results to make a quick

estimate of the fidelity of the model. If there is a large difference between these

two contours, especially at locations that do not have sharp corners or breaks in

the model. Your model may require a finer mesh. More information about the

data conversion Femap uses can be found in the Femap Commands

documentation.






5. Publish two (2) deformed contoured

plots of the Solid Von Mises Stress,

one using Average data and the other

using Max data conversions

a) Display the Solid Von Mises Stress for

the Contour, with the Average type of

data conversion, and the Total

Translation for the deformation.

b) To place a picture of the plot in the

Windows Clipboard, select the File,

Picture, Copy command.

c) Open Microsoft Word and choose Edit,

Paste

d) Repeat steps 5b and 5c for the plot

using Max corner data conversion.




6. Set your PostProcessing options so that the

Undeformed model and the Filled Edges of

elements are not displayed

a) Select the View, Options command (Ctrl+O)

b) In the View Options dialog box, set the

Category to Post-Processing.

c) Select the Undeformed Model option, and

uncheck Draw Entity. Only the deformed

model will be shown.

d) Now select Category, Tools and View Style.

e) Select Filled Edges, and uncheck Draw Entity.

Note: The standard Post toolbar has the option to toggle the display off the Undeformed

model under the Post Options pulldown icon.

Filled Edges display can be toggled on and off under the View Style pulldown icon

in the standard View toolbar.




7. Turn off the deformation.

a) Use either the Post toolbar

Select Undeformed View icon

or the View, Select (F5)

command.

8. Display dynamic isosurfaces.

a) Turn the Filled Edges back

on, and select the View,

Advanced Post, Dynamic

Isosurface command to

dynamically view the regions

of constant stress.


Exercise 12a - PostProcessing with


9. Display and manipulate a dynamic cutting plane.

a) Select the View, Advanced Post, Dynamic Cutting Plane command and

dynamically move the clipping plane.

b) By selecting the Plane button in the Dynamic Section Cut Control dialog box,

change the cutting plane and visualize the results by moving the cutting plane.


Exercise 12b – PostProcessing with

XY Plots

In this exercise, you will become familiar with

Creating XY Plots.

Create additional output sets using the Model, Output, Process

command.


1. Open the model platepost.mod and save it in

your training folder

Make an XY Plot of the

Plate Top VonMises

Stresses.

a) View, Select (F5), select

XY vs. Position, and then

press XY data.

b) Choose NX/Nastran

Case 1 as the Output

Set, and Plate Top

VonMises Stress as the

Output Vector.


XY Plots


This plots all the element centroidal values vs. X position and is not

useful


XY Plots


2. Create a new vector of nodal stresses,

based on the VonMises Stresses.

a) Select Model, Output, Process

b) Select the Convert option then

select 1..NX/Nastran Case 1 as the

Output Set. Next, select

7033..Plate Top Von Mises Stress

as the Output Vector.

c) Press the Add Operation button to

add the Convert Average command

to the processing list, then press

OK to process.

Exercise 12b - PostProcessing with

XY Plots


3. Make a group of nodes on top curve to reduce the amount of data

being plotted.

• Using the View, Select command (or F5 hotkey), change the Model

Style back to Quick Hidden Line.


XY Plots



being plotted.

• Create a group of nodes at the top of the plate by Group Set with

name “Mesh on Top Curve”. Then using the Group, Node on Curve

command pick the top curve. Add the elements to the group using

the Group, Elements, Using Node… selecting Group


XY Plots



being plotted.

• Using Model Info Tree display the new group with Contour Vector,

9000000..Avg-Converted Vec 7033.


XY Plots


4. Generate a new XY Plot, with

only the group of top nodes

used for plotting.

a) Use View, Select, select

XY vs. Position, then press

the XY Data button.

b) For the Group, select Mesh

on Top Curve.

c) Set the Output Vector to

9000000..Avg Converted

Vector 7033 this is the

vector that was created by

the Convert command.


XY Plots


5. Change back to a model view of the entire model.

a) With the View Select dialog box, select the Model Style as Quick Hidden Line

b) Unselect group using right click in the Graphics Window and set the Model Data,

Group to None.

6. Turn off the display of the element edges.

a) Using the Post toolbar’s View Style icon, turn off the Filled Edges

Exercise 12b - PostProcessing

using XY Plots


Animate the model and adjust the Animation Options

a) View Select, Animate (produces a very fast animation), the

select the View, Advanced Post Animation command and set

the animation speed slower

b) Select the Post Options icon from the Post toolbar and make

the following selections: Undeformed (off), Scale Deformation

= 2, Animation Frames = 10 continuously,

Animation Positive Only, and Animate Contours.

Save this as a Movie File (AVI), and insert it into a

presentation.

a) File, Picture, Save, set the file type to .AVI, and save it.

b) Start PowerPoint (if available), open an empty presentation;

then in PowerPoint select the command, Insert, Picture

Movies and Sounds, Movie from FIle, and select the file you

just saved. Double click the image to play it.

Exercise 12b - PostProcessing

using XY Plots

femap_postprocessing

Documents

contour display

postprocessing data

contour data button

deformed contour plots1

deformed contour plots5

deformed contour plots6

contour styles

deformed contour plots