the postprocessing toolbox · 2018. 2. 22. · •femap can work with a reduced set of data...

5/22/2012

IN THIS WEBINAR:

• Contrast of PostProcessing Methods

• PostProcessing Toolbox

The PostProcessing

ToolboxEfficient Methods for Postprocessing

Russ Hilley

Senior Aerospace Stress Engineer

Structural Design and Analysis

[email protected]

PRESENTED BY:

mailto:[email protected]

5/22/2012

STRUCTURES.AERO

Structural Design and Analysis (Structures.Aero)

Structural Analysis

• Team of stress engineers that help our clients

design lightweight and load efficient structures.

• We service aerospace companies and other

industries that require high level analysis.

• Specialty in composites and lightweight

structures

• Tools used include hand analysis, HyperSizer,

Femap, NX Nastran, Fibersim, NX, Solid Edge,

Simcenter 3D, LS Dyna, and LMS.

Software Sales and Support

• Value added reseller providing software, training,

and support for products we use on a daily

basis.

• Support Femap, NX Nastran, Simcenter 3D,

Fibersim, Solid Edge, and HyperSizer.

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PostProcessing Toolbox Topics

• What is it?

– The postprocessing toolbox is a collection of tools which will simplify the tasks associated with viewing analysis results.

• What does it do?

– Deformed / Animated Views

– Contour, criteria, section cuts, and contour arrow plots

– Freebody diagrams

• Help for the PostProcessing Toolbox

– Section 7.2.3 of the FEMAP Commands Reference covers all of the PostProcessing Toolbox Commands.

– Commands.pdf is found in the following folder.• C:\Program Files\Siemens\FEMAPv1141\pdf

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PostProcessing In FEMAP

• Several methods exist to view analysis results. The PostProcessing toolbox combines those

into a central location which makes viewing results more efficient than going through several

menus and dialogs.

• Menu / Shortcut Key Options

– F5 or View-Select

• Select Styles / Deformed and Contour Data – Output Set, Deformed and Contour Vector and other options.

• This method works but requires many button clicks to view the results.

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PostProcessing In FEMAP

• Viewing a Criteria Plot requires some additional steps beyond what was

discussed in the previous slide.

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Inside the PostProcessing Toolbox

1. Toolbox Visibility –

Turn on or off individual tools as

needed

2. Update From Model

3. Select Postprocessing Data

4. Set to Undeformed, No Contour, and

No Freebody

5. Set Deformed Style

6. Set Contour Style

7. Set Freebody Style

8. Auto Redraw

9. Manual Redraw

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PostProcessing Toolbox - Tools

• Three tools exist in the toolbox.

– Deformed Tool: Most commonly used to show deformed shapes but can also be used

to show animations of single or multiple output sets.

– Contour Tool: Used to display contour or criteria plots of analysis results. The contour

tool also contains the capability of displaying section cut stress plots, contour arrow

plots, and beam diagrams.

– Freebody Tool: Used to display freebody diagrams to easily view applied and reaction

loads or internal loads on a finite element model.

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PostProcessing Toolbox – Deformed Tool

• Style: Deformed, Animate, Multi-Set Animate

• Output Set / Vector Selection – Will set the

output vector for all deformed plots

• Transform: Select any transformation options

– None, Output CSys, or Model CSys

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• Scale: Set to % of Model or Actual

deformation

– Max % Model or Scale Actual By controls

the amount the deflection is exaggerated.

– Deform Relative To – Deformation can be

relative to the model origin or a fixed node.

• Undeformed Model: When checked on

will show an overlay of the undeformed

shape of the model.

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• Deformed View with and without Undeformed shape shown.

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PostProcessing Toolbox – Deformed Tool - Animate

• Animate: Shows an animated view of the model. Useful for animating deflections and normal mode shapes.

• Animation

– Choose Full or Full Absolute to see animation in the load and unload condition.

– Choose Half or Half Absolute to see animation in the loaded direction only.

– Frames – Increasing the number of frames will smooth the animation.

– Animation Control – allows the control of the speed and shape of the animation as well as the ability to pause the animation or move frame by frame.

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PostProcessing Toolbox – Deformed Tool - Animate

• Animate – Multiset: Allows the

animation of multiple output sets.

– Nonlinear steps

– Transient thermal

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PostProcessing Toolbox – Contour Tool

• Style: Contour, Criteria, Beam Diagram,

Section Cut, Contour Arrow

• Output Vector: Used for all contour

styles

– Additional Vectors: allows the user to

select an additional two vectors to be

plotted

• Transform: Contour transformation

options

• Data conversion options.

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• Data Selection: Contour Group, Visible

Groups, or All Data / Full Model

• Type: Match Output, Nodal, or

Elemental contour.

– Double Sided Planar: Displays bottom or

top (depending on Output Vector) for shell

elements with top and bottom results.

– Show on Groups: Limits the contour to Full

Model / Visible groups, Active Group, or a

specific group.

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Averaging On No Averaging, Centroid Only

Contour on a specific GroupDouble sided planar

contour

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• Levels – Applies to all contour views– Level Mode

• Automatic, based on Data Selection option

• Max/Min – user defined maximum and minimum

• User Defined – user defined max/min and individual contour levels

• Max Threshold – sets a maximum threshold value where values above this user-defined value are colored with the upmost color band

• Label Max/Min – Places the max / min or both values on the model.

– Contour Palette• Choose between standard or user defined contour

palettes.

– Number of levels controls the levels on the legend.

– Animate controls whether contour colors are animated when viewing animated deformed plots.

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PostProcessing Toolbox – Contour Tool – Criteria Plots

• Criteria plots show actual values for shells, solids, and beam results.

• Criteria plots look like contour plots with no averaging.

• With criteria plots, results can be labeled as well as having pass / fail criteria

set to display only certain regions or ranges of results.

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• Limits Mode: the limits determine what is considered to be pass criteria.

– No limits

– Above Maximum – results above the maximum setting pass

– Below Minimum – results below the minimum setting pass

– Between – Results between the max and min pass

– Outside – Results outside the max and min settings pass

• Labels can be displayed for elements which pass or fail the specified criteria

• Display for Elements that Fail the criteria

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• Criteria Plot showing Plate top Von Mises stress above a max value of 4000

psi.

• Elements which fail the criteria are shown but not contoured.

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PostProcessing Toolbox – Contour Tool – Beam Diagram

• Show As: Choose Beam Diagram or Beam

Contour

• Label: Labels can be placed at peaks or

nodes or not shown.

• Direction: The direction can be reversed for

all options

• Show Reversed: Toggles the display of the

beam diagram to the opposite direction

• Scale %: Adjusts the size of the beam

diagram

• Border Color: A color can be selected for the

border of beam diagrams.

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• Beam Diagram showing Beam EndA Plane2 Moment

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• Beam Contour

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PostProcessing Toolbox – Contour Tool – Section Cut

• Section cuts can be used to

display slices of a solid model.

• Cut options

– Cut Model

– Parallel Sections

– Multiple Sections

• Cutting Plane: Specifies the slice

location and orientation.

• Dynamic Control: Allows the

cutting plane to be moved

through the model.

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PostProcessing Toolbox – Contour Tool – Section Cut

Cut Model Parallel Cuts Multiple Cuts

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PostProcessing Toolbox – Contour Tool – Contour Arrow

• Arrow plots show one or more output

vectors as arrows on nodes or elements.

• Selected Output Vector (Contour Vector)

is used as a “seed” vector

• Related Output Vectors will be selected

and automatically paired (default)

• Styling and orientation is handled

automatically (default)

• Non-directional quantities, such as

temperature or Von Mises stress require

a user defined direction.

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• Solid Arrows – toggle to display as solid arrows

• Arrow Length – value to control length of arrows

• Scale by Magnitude – toggle to scale length of arrows with respect to output value

• Min Vector Magnitude – specifies a minimum magnitude for display

• Arrow Labels – Label Mode for Contour Arrows Label

– Off

– On

– Exponent

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• Contour Arrow Plot

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PostProcessing Toolbox – Freebody Tool

• Freebodies provide an insight into nodal forces and moments that are a result

of surrounding finite element entities

• In FEMAP, freebodies can be used to display a balanced set of loads on a

structure or calculate the load across an interface.

• Freebodies are commonly used when modeling practices dictate that the

resulting FE mesh is a “coarse-grid” mesh and is suitable as an “internal

loads” model

• Commonly modeled structures are often too complicated to model in

sufficient detail to obtain useable stresses

• The freebody tool is only accessible in the PostProcessing toolbox and only

when results are present in the model.

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• To take full advantage of the FEMAP Freebody tool, the grid point force

balance must be recovered as part of the analysis.

– Turn on “Force Balance” in the Nastran Output Requests.

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• FEMAP can work with a reduced set of data including applied load (OLOAD),

constraint force (SPCFORCE), and constraint equation (MPCFORCE)

• This is generally not recommended unless only a generic freebody display of

the entire structure is all that’s required

• Additionally, care should be taken when not requesting GPFORCE data for

the entire model.

• Set the results destination to “Print and PostProcess” if it is desired to view

the grid point force data in the f06 file.

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• Freebody diagrams exist as objects in the database the same as nodes and elements. Freebody diagrams are saved in the database for future use.

• Any number of freebody diagrams can exist and be displayed simultaneously.

• There are 3 types of freebody diagrams.– Freebody

– Interface Load

– Section Cut

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• Freebody: The user selects the elements and FEMAP determines the nodes

to be used. This type of diagram is to show a balanced set of loads on a

discrete portion of the structure.

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• Interface Load: The user selects both nodes and elements and FEMAP

calculates a summation of loads and forces across the interface and displays

as a single vector

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• Section Cut – similar to interface load, a summed load across an interface is

displayed and calculated, however node and element selection is automated

by FEMAP. The user selects a “cutting plane”, defined by a plane, vector or a

curve. The cutting plane can be dynamically located within the model

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• Global Settings – These controls affect all

freebodies in the model. Control global

display of freebodies, select output set

(tied to contour and deform) and enable

data summation on nodes

• Freebody Settings – These controls are

related to individual freebodies, such as

selecting nodes and elements

• View Settings – These are global settings

that affect freebody visualization (symbol

sizes, vector scaling, etc.). Same as

found in View Options (F6)

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• Freebody Vector Visualization–Additional detailed options for visualization

can be found by expanding the Total

Summation Vector and Nodal Vector(s)

nodes

–Select components displayed (Fx, Fy, Fz),

(Mx, My, Mz)

–Select components included in calculation

(interface load and section cut only)

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• Creating a New Freebody – New Freebody diagrams are created from the

Freebody Manager.

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PostProcessing Toolbox – Freebody Tool - Freebody

• When using “Freebody Mode”, the user selects elements and FEMAP will

automatically select related nodes

• This mode is designed to display a balanced set of loads on a selected set of

elements

• Entities may be selected manually (default) or inferred for a selected group

• The default contribution selections will display forces/moments acting on the

selected elements

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PostProcessing Toolbox – Freebody Tool - Freebody

• Creating a New Freebody

– Click on the “Select FreeBody Elements” button

– Select all elements

– FEMAP displays the Freebody diagram

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PostProcessing Toolbox – Freebody Tool – Interface Load

• Interface load freebodies display nodal vectors for selected nodes as well as

a total summation vector at a selected location

• Unlike freebody mode freebodies, interface load freebodies are not likely to

be in equilibrium

• In addition to element selection, nodes must be selected manually – FEMAP

does not infer them based on the selected elements

• When selected entities from a group, both the nodes and elements of interest

must exist in the group

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• The difference between creating an Interface Load Diagram and the Freebody

only diagram is the entity selection.

• We use the same “Create Freebody” button in the Freebody tool.

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• To create an Interface Load Diagram, we must select the elements to be

considered and then the nodes at the desired interface.

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PostProcessing Toolbox – Freebody Tool – Section Cut

• An extension to Interface Load mode

– The user defines a cutting plane in the model and the contributing freebody nodes and elements are determined automatically

• Total summation location can be placed at

– Plane/path intersection

– Nodal centroid

– Static location

• Nodal and total summation vectors can optionally be aligned tangent to the path without having to create additional coordinate systems

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Try FEMAP for FREE – 45 Day Free Trial

https://structures.aero/software/femap/pricing/



5/22/2012

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For questions on the material covered

today, please contact Russ Hilley.

For questions about pricing, or to see a

demo, please contact Marty Sivic.

Questions?

Marty SivicDirector of Sales

[email protected]

724-382-5290

Russ HilleySenior Aerospace Stress Engineer

[email protected]

703-657-0919



the postprocessing toolbox · 2018. 2. 22. · •femap can work with a reduced set of data...

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