Acoustic Panel Normal Velocity dialog box (Acoustics BEM)

Name
Name	Sets the name of the acoustic panel normal velocity.
Description	Sets description for the acoustic panel normal velocity.
Destination Folder
Load Container	Specifies the folder in the Simulation Navigator in which to store the acoustic panel normal velocity boundary condition.The list includes the root container and folders that you created using the New Folder command in the Load Container.
Folder Manager	Displays a hierarchical list of folders.To create a new folder, right-click any level of the hierarchy and choose New Folder.
2D Fluid Elements
Group Reference	Lets you select a group of 2D fluid elements to apply the acoustic panel normal velocity.For more information, see Group Reference options.
Select Object	Specifies the 2D fluid elements to which to apply the acoustic panel normal velocity.
Stacked Smart Selector Methods	Opens the Smart Selector Methods dialog box where you can specify a progression of smart selection filters.For more information, see Smart Selector Methods dialog box.
Excluded	Lets you remove individual entities from within the selected object.Select Object: Lets you select the geometry or FE entities from which the acoustic panel normal velocity will be removed. You can select it by using the Excluded icon.
Element Side
Side	Available for Indirect BEM Acoustic and Vibro-Acoustic solutions.Specifies the side of the fluid elements of the acoustic mesh on which to apply the acoustic panel normal velocity.Top — Applies the acoustic panel normal velocity to the top (positive) side of the fluid elements of the acoustic mesh.Bottom — Applies the acoustic panel normal velocity to the bottom (negative) side of the fluid elements of the acoustic mesh.Top and Bottom — Applies the acoustic panel normal velocity to the top (positive) and bottom (negative) side of the fluid elements of the acoustic mesh.Note: The direction of arrows on the selected fluid elements depends on the normals of the elements. It does not depend on the selected element side.When the acoustic mesh is composed of a single element, and an Acoustic Panel Normal Velocity is applied on both sides of the element to Top and Bottom, the pressure jump is zero at all nodes of the element, resulting in zero acoustic pressure at the microphones.
Value
Specifies the complex excitation values as real and imaginary parts, magnitude and phase angle, and complex field values of the acoustic panel normal velocity.
Normal Velocity	Specifies how the excitation is defined.
Real	Available when Normal Velocity is set to Real/Imaginary.Sets the real component value of the magnitude of the excitation.
Imaginary	Available when Normal Velocity is set to Real/Imaginary.Sets the imaginary component value of the magnitude of the excitation.
Magnitude	Available when Normal Velocity is set to Magnitude/Phase.Sets the magnitude value of the excitation.
Phase	Available when Normal Velocity is set to Magnitude/Phase.Sets the phase angle value of the excitation.
Specify Field	Available when Normal Velocity is set to Field.Specifies the frequency dependent complex field values.Options include:Select Existing Field from List opens the Fields dialog box, where you can select a field.A field can define a magnitude that varies with independent variables such as frequency, temperature, or time. For more information about fields, see Fields.Formula Constructor opens the Formula Field dialog box, where you can define a formula to construct a field.For more information, see Define a boundary condition using a formula field.Table Constructor opens the Table Field dialog box, where you can define tabular data to construct a field.For more information, see Define a boundary condition using a table field and Define a material property using a table field.Plot (XY) plots the field as an XY graph.For more information, see Graph overview.Overlay (XY) overlays a plot on an existing plot. You can overlay up to 50 plots.For more information, see Overlay plots.Scale Factor — Sets the scaling of values present in the Field.

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Defining acoustic sources and loads (Acoustics BEM)

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Acoustic Panel Normal Velocity dialog box (Acoustics BEM), Simcenter 3D 2021.1 Series

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