Result probes

Video: Graph the distance between locations over time

Result probes provide you with a flexible way to use expressions to generate customized results.

Result probe output as a post view of the upper limit of worst principal stress plus stress error norm

• A result probe is associated with a solution. You can define a result probe either before or after you solve the model.

• To use a result probe, the model must be solved. You can use a result probe to generate post views, graphs, fields, or text. The result probe evaluates the results, and then generates the output.

• Result probes are stored in the Simulation file.

Applications of result probes

With result probes, you can do the following:

• Track the clearance between two points, identify the initial positions, and define displacement.

• Track history at discrete locations such as points, edges, and faces.

• Evaluate results-dependent properties such as temperature-dependent materials.

• Use the results as input to result-dependent maps, such as those used by boundary conditions.

• Envelope results by specifying the minimum and maximum over an iteration range or over geometry. To generate minimum or maximum results as a unitless, scalar quantity, envelope results by comparing two or more results of the same type and component.

• Combine results by using standard expression syntax to perform one or more operations on results of the same type.You can define a formula for any combination of result-based quantities, general expressions, predefined plug-in functions, result variables, other result probes, fields, or a point.

Creating a result probe

To create a result probe, you can specify the following:

• A formula, which is an expression that defines the results to be generated. The formula can include result variables, predefined plug-in functions, other result probes, fields, or points. For information on constructing and using CAE expressions, see Expressions.

• The results to use.Loadcases.Iterations. You can combine the loadcases into a single data series, often referred to as subcase packing. For example, you could combine all the loadcases for a particular panel and average the results. You could then output the results as a post view.

• Geometry or FE entities to include. You can use a query curve to specify where you want the results, specify groups of entities, including panels of elements, or specify a selection recipe. For more information about specifying selection recipes, see Using selection recipes with result probes.You can also combine the results, often referred to as spatial packing. For example, you could combine the panels based on the arithmetic mean and output the results as a graph.

Some of these options may not apply to your results data.

Valid formulas

The table lists examples of valid formulas.

Type	Example(s)
One result variable	temp = result variable defining temperature at nodes
Two result variables, combined	wpstressavg + stresserrorwpstressavg = result variable defining worst principal stress at elementsstresserror = result variable defining stress error at elements
One result variable combined with a constant value.	temp + 25(K) = temperature at nodes + 25 degrees K
Predefined functionsFor a list of the mathematical functions, see Mathematical functions in expressions.	TEMP = built-in temperature functionSTO(8) = outlet temperature for stream 8
Reference to a field	fd(“YieldStrengthSteelAlloy”) = field that defines yield strength property for the Steel Alloy material
Reference to another probe	fd(“TempLoadProbe”) = a probe that defines the temperature load

Processing vector results for acoustic analysis

To help you process vector results for acoustic analysis, you can perform the following conversions through the Result Probe and Result dialog boxes.

• Process vector results on frequency bands (frequency packing).

• Perform linear interpolation of results at specified frequencies or time.

• Project the result vectors along the local normal.

• Convert order results to waterfall.

• Calculate normal acoustic intensity.

For more information, see Processing results for acoustic analysis.

Generating output from a result probe

You can output the results of a result probe while creating it or later. The output types depend on the probe definition. They can include post views, graphs, fields, or an information listing. The output definitions are saved with the result probe. For more information, see Generating result probe output.

Setting distance to mesh tolerance

Use the Distance to Mesh Tolerance box in the Post Processing Preferences dialog box to set a tolerance for selecting points on surfaces (when Selection Type on the Result Probe dialog box is set to Points). If a selected point does not lie on the surface, the result probe uses the nearest point on the surface that is within the tolerance you specified for its calculations.

For example, if you want to extract results from locations on your FE model, which is a plane of thin shell elements, the points you select may not always lie on the FE model since you enter coordinate values. In that case, the result probe issues a warning that no results are found at the specified point location and reports the value as having no data:

By changing the distance to mesh tolerance to a larger value, the result probe finds the point locations and provides the expected results.

Importing result probes from other models

You can use the Import Simulation Entities command to import result probes from a simulation into Pre/Post without importing the simulation and all its entities. The software imports the selected result probes with their referenced result variables, expressions, fields, condition sequence parameters, and other entities needed to support them. Error messages appear if a mismatch exists between the result probes and the target solution, such as when the dimensions are not the same.

When you import a result probe, its state is either active or asleep (inactive), depending on whether the entities of the result probe can be mapped to the target simulation. The sleep state appears in the Simulation Navigator and in the Information dialog box.

When the result probe is asleep, you can edit, rename, delete, or display information about the result probe so you can restore it to an active state. A result probe is active when entities associated with the result probe are in the simulation.

For more information about importing result probes and restoring their active state, see Importing simulation entities.

Where do I find it?

Application	Pre/Post
Prerequisites	A Simulation file as the displayed part and work partResults loaded
Command Finder	Result Probe
Simulation Navigator	Right-click solution node→New Result ProbeRight-click Result Probes node→New Result Probe

How do I

Create a result variable to use in a result probe

Display results using a result probe

Output a result probe to a table field

Copy result probes

Delete result probes

Learn more

Processing results for acoustic analysis

Result variables

Generating result probe output

Using selection recipes with result probes

Look up more details

Octave bands

Frequency interpolation methods

Quick links

Command reference

Pre/Post video examples

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Result probes, Simcenter 3D 2021.1 Series

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