Nodal response functions

The Evaluate Nodal Function Response dialog box calculates response functions at selected nodes. Nodal response functions each contain one response (for example, displacement at one node) as a function of time (time history) or frequency (results over a range of frequencies).

You can evaluate displacement, velocity, acceleration, stress, strain, and reaction force at a node (you can select up to 100 nodes in an evaluation, but only 50 records can be plotted at a time). To evaluate nodal stress results, use the Evaluate Elemental Function Response command and choose Corner as the Location.

Note:

When you created the static or dynamic solution, you should have created a Structural Output Request and specified the result types to evaluate. For more information, see Define Response Dynamics result types.

You can generate nodal functions for Transient, Quasi-Static, Frequency, and Random events.

Function names

Response functions are stored as function records in an AFU file with the same name as your Response Dynamics solution process.

In the AFU file, the node ID and response direction are reflected in each function's name. For example, 2_(101Y+)_1 means that the function is the function “2” response at node 101 in the positive Y direction.

You can also find the node ID and response direction listed in the Response ID box on the Identifier tab of the Data Attributes (Ideas Format) dialog box (click Data Attributes on the XY Function Editor dialog box). The direction is represented by the axis of the nodal displacement coordinate system. If the direction is not shown in the name, the response is in a general direction, and its direction vector can be found in the ID lines on the Data Attributes dialog box.

For nodal average stress-strain function responses, the AFU name follows this format:

prefix_record number_(node ID Data Component Evaluation location)

For example, prefix_1_(101XXC), prefix_2_(101XXTOP), prefix_10_(101XX) are the XX data component AFU records for a 1D element at the C recovery point, a 2D element at the Top shell element layer and a 3D element.

Note:

For User Defined Direction, there is no Data Component in the AFU record name, such as prefix_18_(101C). You can find the user defined vector in the ID lines on the More ID Info dialog box.

Where do I find it?

• Choose Response Dynamics tab→Response Dynamics group→Evaluate Nodal Functions .

• Simulation Navigator→right-click the event node→Evaluate Function Response→Nodal

How do I

Evaluate nodal function responses

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Nodal response functions, Simcenter 3D 2021.1 Series

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