RMS results

Use the Evaluate RMS Results dialog box to calculate the root mean square (RMS) value for selected nodes or elements. The RMS value is a statistical value that is equal to the standard deviation (1 sigma) of a random process when its mean value is zero. You can generate RMS results for Random events only.

You can evaluate selected displacements, accelerations, stresses, strains, element forces, and shell stress resultants, depending on the available modes.

Note:

When you created the 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.

RMS results are scalar results of the RMS values at nodes or on elements. You can store the results in two different formats: node or node-on-element. The RMS values of the nodal response (such as displacement or acceleration) are stored in nodal format, while the RMS values of the elemental response (such as stress, element force, or shell stress resultant) are stored in node-on-element format.

• The nodal RMS results in a given direction (for example, acceleration in the X direction) are vector results. The magnitude is the RMS value, and the direction shows the requested (nodal) direction in the coordinate system.

• The elemental RMS von Mises stress and RMS strain results are scalar results.

• Results can be in the nodal displacement coordinate system or the element coordinate system, depending on the type of output you select.

• If the dynamic solution results file contains ply stress or strain modes, you can generate contour results for the ply layers. The composite elements are evaluated with respect to the ply result coordinate system.

Where do I find it?

Evaluate RMS Results

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed partSimcenter Nastran as the specified solverA solved random event in Response Dynamics
Command Finder	Evaluate RMS Results
Simulation Navigator	Response Dynamics tab →Response Dynamics group→Evaluate RMS Results

Evaluate RMS Contour Results

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed partSimcenter Nastran as the specified solverA solved random event in Response Dynamics
Command Finder	Evaluate RMS Results
Simulation Navigator	Simulation Navigator→right-click the event node Evaluate Contour Results→RMS

How do I

Evaluate response results

Learn more

Response results

Strength results

Peak results

Level crossing results

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RMS results, Simcenter 3D 2021.1 Series

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