Pre-Test

Use the Pre-Test command to create the pre-test solution process and obtain optimal sensor and exciter locations for modal testing. The pre-test solution process finds these locations using the finite element model and a normal mode solution.

In the Pre-Test dialog box, you can:

• Select the analysis solution and subcase that contain the normal mode shapes. The Analysis solution lists the solutions that are supported for pre-test planning.Note: When you edit a pre-test solution process, you cannot change the analysis solution but you can select a different subcase. To open a pre-test solution process that was saved in a release prior to Simcenter 3D 2021.1, containing a subcase without modes, you must edit the solution process and select a valid subcase.

• Remove or add low-frequency modes and high-frequency modes by specifying a cutoff frequency.

When you create a new pre-test solution process, the software automatically creates the Pre-Test node in the Simulation Navigator panel. Under the Pre-Test node are modal representations of the analysis solution, sensor selection nodes, and exciter selection nodes.

Pre-Test 1	Active
Analysis Solution Results
Modes [30]	Ready
Sensor Selection
Candidate DOF [0]
Required DOF [0]
Configurations [0]
Exciter Selection
Sensor DOF [0]
Candidate DOF [0]
Configurations [0]

Where do I find it?

Application	Pre/Post
Command Finder	Pre-Test
Simulation Navigator	Right-click the Simulation file node→New Solution Process→Pre-Test Planning

How do I

Create a new pre-test solution process

Display Auto-MAC results for the modes

Change the weight of the mode

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Pre-Test, Simcenter 3D 2021.1 Series

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