Correlation nodes in the Simulation Navigator

The main panel of the Simulation Navigator includes several nodes that you use specifically for the correlation solution process. For more information, see Simulation Navigator overview.

FRF SetsFRF Set 1FRF Set 2	FRF Sets	FRF Set 1	FRF Set 2	The standalone FRF Sets node contains the FRF sets imported from the test reference solutions. You can edit FRF sets and activate the desired FRF set for the FRF correlation solution process.Note: FRF sets are also used for other applications. For more information, see Frequency response function (FRF) models.
FRF Sets
FRF Set 1
FRF Set 2
Test Models Test Model 1Test Model 2	Test Models	Test Model 1	Test Model 2	The Test Models node can contain multiple test models. Each test model node contains imported test geometry: test nodes, tracelines, coordinate systems, and alignment results.
Test Models
Test Model 1
Test Model 2
Alignment	Alignment	TheAlignment node stores any existing alignment data. To geometrically align the test model with the work model, right-click the test model node and choose Alignment. You can export or reset the alignment data using the Alignment node.
Alignment
Solution 1 Test Model 1 Modes Initial Mode Sensors[30] ResultsStructuralFRFsInitial FRF Sensors [19] FRF Set 1 [60] or Solution 1 Test Model 1Pressure Modes Initial Pressure Mode Sensors[30] ResultsAcousticFRFsInitial FRF Sensors [0] No FRF Set Reference	Solution 1	Test Model 1	Modes	Initial Mode Sensors[30]	Results	Structural	FRFs	Initial FRF Sensors [19]	FRF Set 1 [60]	Solution 1	Test Model 1	Pressure Modes	Initial Pressure Mode Sensors[30]	Results	Acoustic	FRFs	Initial FRF Sensors [0]	No FRF Set Reference	Test solution nodeThe test solution node points to a test model and test results.When the test solution contains structural mode or operational shape results, the Modes node contains an initial mode shape sensor set and mode or operational shape results. The number in the square brackets of the Initial Mode Sensors [#] node indicates the number of sensors extracted from the test shapes.When the test solution contains FRF results, the FRFs node contains the standalone FRF set created at import and initial FRF sensors. The number in the square brackets of the Initial FRF Sensors [#] node indicates the number of sensors extracted from the test model. The number in the square brackets of the FRF Set 1 [#] node indicates the number of FRFs in the test solution.When the test solution contains acoustic modes, the Pressure Modes node contains an initial pressure mode shape sensor set and mode shape results. The number in the square brackets of the Initial Pressure Mode Sensors [#] node indicates the number of sensors extracted from the test mode shapes.When you select the Modes or Pressure Modes node, the software populates the Correlation Details View subpanel with the normal modes or operational shape frequencies. For more information, see Correlation Details View subpanel (correlation solution process)
Solution 1
Test Model 1
Modes
Initial Mode Sensors[30]
Results
Structural
FRFs
Initial FRF Sensors [19]
FRF Set 1 [60]
Solution 1
Test Model 1
Pressure Modes
Initial Pressure Mode Sensors[30]
Results
Acoustic
FRFs
Initial FRF Sensors [0]
No FRF Set Reference
Test Analysis Reference Solution 1 TAM for Test Analysis Reference Solution Modes Initial Mode Sensors[30] ResultsFRFsInitial FRF Sensors[0] No FRF Set Reference	Test Analysis Reference Solution 1	TAM for Test Analysis Reference Solution	Modes	Initial Mode Sensors[30]	Results	FRFs	Initial FRF Sensors[0]	No FRF Set Reference	Test Analysis Reference SolutionThe test analysis reference solution node points to a test analysis model and solution results for the associated DOFs.When the solution contains modal results, the Modes node contains an initial mode shape sensor set and mode shape results. The number in the square brackets of the Initial Mode Sensors [#] node indicates the number of DOFs associated to the solution.FRFs are not currently attached to the Test Analysis Reference Solution.
Test Analysis Reference Solution 1
TAM for Test Analysis Reference Solution
Modes
Initial Mode Sensors[30]
Results
FRFs
Initial FRF Sensors[0]
No FRF Set Reference
Correlation 1	Correlation 1	The Correlation node references both the reference and the work solutions, including their shapes. Depending on the result type, the Correlation node has different icons and contains different nodes.For a modal correlation solution process, the Correlation node is indicated by and contains a node map, mode shapes, sensor sets, and mode pairs.For an FRF correlation solution process, the Correlation node is indicated by and contains a node map, FRF sensor sets, and FRF pairs.
Correlation 1
Solution 1 Modes [10] or Solution 1 FRFs [65]	Solution 1	Modes [10]	Solution 1	FRFs [65]	Reference solution nodeFor a modal correlation solution process, the reference solution node contains the Modes [#] nodes. The number in the square brackets indicates the number of active normal modes of the reference solution. The reference solution can be a test solution or another analysis solution.For an FRF correlation solution process, the reference solution node contains the FRFs [#] nodes. The number in the square brackets indicates the number of active FRFs of the reference solution. The reference solution must be a test solution.
Solution 1
Modes [10]
Solution 1
FRFs [65]
Solution 2 Modes [15] A-Set DOF [90Mr [90 x 90]	Solution 2	Modes [15]	A-Set DOF [90	Mr [90 x 90]	Work solution node for a modal correlation solution processThe work solution results nodes can contain the A-Set DOF [#], Mr [# x #], U-Set DOF [#], and Modes [#] nodes.The A-Set DOF [#] and Mr [# x #] nodes are displayed when an Analysis (A SET) DOF set exists. The A-Set DOF must be compatible with the DOFs of the test sensors to enable the cross-orthogonality shape correlation metric. The Mr [# x #] node indicates that a reduced mass matrix exists for the work solution and is found in the OP2 result file.The U-Set DOF [#] node is displayed when an Analysis (U SET) DOF set exists in the OP2 result file. The U-Set DOF [#] node is shown for information only. U-Set DOFs do not affect correlation results. U-Set DOFs have meaning for the Model Update solution process, see Simcenter 3D FE Model Update for more information.Note: The A-Set DOF [#], Mr [# x #], and U-Set DOF [#] nodes are only supported for Simcenter Nastran SOL 103 Real Eigenvalues and SOL 200 Model Update solutions.
Solution 2
Modes [15]
A-Set DOF [90
Mr [90 x 90]
Solution 2FRFs [756]	Solution 2	FRFs [756]	Work solution node for an FRF correlation solution process The work solution node contains the FRFs [#] nodes. The number in the square brackets indicates the number of FRFs of the work solution.Note: The work solution must be a Nastran SOL 108 Direct Frequency Response Functions or SOL 111 Modal Frequency Response Functions solution.
Solution 2
FRFs [756]
Node Map [17]	Node Map [17]	The Node Map [#] node contains the number of nodes that are paired between the work model and the reference model, based on proximity. Ideally, this number should be equal to the number of sensors in the sensor sets.When you select the Node Map [#] node, the software populates the Correlation Details View subpanel with node map information. For more information, see Correlation Details View subpanel (correlation solution process).
Node Map [17]
Mode Sensor Sets Initial Mode Sensors [30] Sensor Set 1 [30] Sensor Set 2 [30]or Mode Sensor Sets Initial Mode Pressure Sensors [520] Mode Pressure Sensors 1 [520] Mode Pressure Sensors 2 [520]	Mode Sensor Sets	Initial Mode Sensors [30]	Sensor Set 1 [30]	Sensor Set 2 [30]	Mode Sensor Sets	Initial Mode Pressure Sensors [520]	Mode Pressure Sensors 1 [520]	Mode Pressure Sensors 2 [520]	For a structural or acoustic modal correlation solution process, the Mode Sensor Sets node contains the initial sensor set from the test reference solution and any number of sensor sets that are cloned from the initial sensor set. You can only edit the cloned sensor sets. You cannot add sensor DOFs that do not exist in the initial sensor set.After cloning and editing sensor sets, you can activate the desired sensor set for the modal correlation solution process.
Mode Sensor Sets
Initial Mode Sensors [30]
Sensor Set 1 [30]
Sensor Set 2 [30]
Mode Sensor Sets
Initial Mode Pressure Sensors [520]
Mode Pressure Sensors 1 [520]
Mode Pressure Sensors 2 [520]
FRF Sensor Sets Initial FRF Sensors [16]	FRF Sensor Sets	Initial FRF Sensors [16]	For an FRF correlation solution process, the Initial FRF Sensor [#] node contains the initial sensor set from the test reference solution.
FRF Sensor Sets
Initial FRF Sensors [16]
Mode Pairing Mode Clusters [4] Mode Pairs [8]	Mode Pairing	Mode Clusters [4]	Mode Pairs [8]	For a modal correlation solution process, the Mode Pairing node contains the following nodes:The Mode Clusters node, which contains mode clusters of work and reference mode shapes. It appears in the Simulation Navigator when you select the Define Mode Clusters check box in the Mode Pairing Control dialog box.The Mode Pairs node, which contains mode pairs that the software finds between the reference and work solutions.When you select the Mode Clusters or Mode Pairs node, the software populates the Correlation Details View with the mode clusters or mode pairs. For more information, see Correlation Details View subpanel (correlation solution process).
Mode Pairing
Mode Clusters [4]
Mode Pairs [8]
Mode Correlation Metrics	Mode Correlation Metrics	For a modal correlation solution process, the Mode Correlation Metrics node provides access to Correlate Mode dialog box, as well as to Plot MAC, Plot X-Ortho and the (1 – COMAC) commands. The Plot MAC and Plot X-Ortho commands are shortcuts to launch matrix plots using the up-to-date reference and work solution mode shapes and the up-to-date node map and active sensor set. You can display the (1 – COMAC) results in the Post Processing Navigator to visually identify the parts of the structure which are responsible for a poor correlation between the reference solution and the work solution.
Mode Correlation Metrics
FRF Pairing [20] Filter 1 [18] Filter 2 [20]	FRF Pairing [20]	Filter 1 [18]	Filter 2 [20]	For an FRF correlation solution process, the FRF Pairing [#] node contains the FRFs pairs that the software finds between the reference and work solutions.When you select the FRF Pairing [#] node, the software populates the Correlation Details View subpanel with the FRF pairs. For more information, see Correlation Details View subpanel (correlation solution process).The Filter[#] node contains the filtered FRF pairs. You can create more than one filter. For more information, see FRF pairing
FRF Pairing [20]
Filter 1 [18]
Filter 2 [20]

Right-click commands for the correlation solution process are available when you select the nodes in the Simulation Navigator. For more information, see Right-click commands for the correlation solution process.

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Pre-test solution process commands

Pre-test solution process nodes in the Simulation Navigator

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Correlation Details View subpanel (pre-test solution process)

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Right-click commands for the correlation solution process

Correlation Details View subpanel (correlation solution process)

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Model update nodes in the Simulation Navigator

Right-click commands for model update nodes

Correlation Detail View subpanel (model update and model update set solution processes)

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Correlation nodes in the Simulation Navigator, Simcenter 3D 2021.1 Series

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