ATV response

In the Simcenter 3D Noise and Vibration environment, you can use the Acoustic Transfer (ATV) Response solution to compute vibro-acoustic responses of a model that contains all of the following:

• An ATV Set (from a FEM or BEM analysis).Note: An ATV Set replaces a component or assembly FEM file that contains an acoustic domain mesh.

• A FEM file that contains the structure.

• A fluid-structure coupling definition.

• Forcing frequencies.

• Load recipe to create loads from data source files.Note: You use data source files from structural solutions that may contain frequency, order, or RPM data stored in a file in Nastran (.op2 or .pch) results files, Simcenter 3D HDF5 (.sc_h5) results files, and so on. However, data in time domain must be first converted to frequency domain data or waterfall of time data by using the Model and Loads Pre-processing solution process.

• Visualization elements for post-processing.

The ATV response solution can efficiently compute vibro-acoustic pressure, structural panel contributions, ATV contributions, and other quantities in the context of one-way (weak) coupled interior or exterior vibro-acoustic problems.

Note:

ATV contribution results depend on several factors, especially fluid-structure coupling values.

You use the ATV Vibro-Acoustic Output Requests modeling object to specify the following types of results to recover from the ATV response solution and post-process them using the Scenario Based Data-Visualization Navigator:

• Acoustic pressure

• Acoustic intensity

• Structural panel contributions

• Equivalent radiated power

• Element equivalent radiated power

You use this method, for example, to compute vibro-acoustic pressure in an automotive cabin that is excited by external loading, and when you are certain that the effect of the fluid on the structure is negligible.

Where do I find it?

Creating Simcenter 3D Noise and Vibration Simulation files

Application	Pre/Post
Prerequisites	An assembly FEM file as the work part and displayed part, a FEM or BEM file represented as an ATV set, and FEM file that contains the structure
Command Finder	New Simulation
Simulation Navigator	Right-click the assembly FEM file→New Simulation
Menu	File→Utilities→New Simulation

Creating Acoustic Transfer Vector (ATV) Response solutions

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed part, an assembly FEM file, a BEM or FEM file represented as an ATV Set, and FEM file that contains the structureSimcenter 3D Noise and Vibration as the specified solverVibro-Acoustic as the specified analysis typeAcoustic Transfer Vector (ATV) Response as the specified solution type
Command Finder	Solution
Simulation Navigator	Right-click the Simulation file→New Solution

Creating ATV Vibro-Acoustic Output Requests

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed part, an assembly FEM file, a BEM or FEM file represented as an ATV Set, and FEM file that contains the structureSimcenter 3D Noise and Vibration as the specified solverVibro-Acoustic as the specified analysis typeAcoustic Transfer Vector (ATV) Response as the specified solution type
Command Finder	Modeling Objects
Simulation Navigator	Right-click the Modeling Objects node→Modeling Objects
Location in dialog box	Type list→ATV Vibro-Acoustic Output Requests

Specifying coupling definition

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed part, an assembly FEM file, a BEM or FEM file represented as an ATV Set, and FEM file that contains the structureSimcenter 3D Noise and Vibration as the specified solverVibro-Acoustic as the specified analysis typeAcoustic Transfer Vector (ATV) Response as the specified solution type
Command Finder	Modeling Objects
Simulation Navigator	Right-click the Modeling Objects node→Modeling Objects
Location in dialog box	Type list→Fluid-Structure Interface Modeling Parameters

Importing, editing, or creating load recipes

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed part.
Command Finder	Load Recipes

Attaching a load recipe to a solution

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed part.Simcenter Nastran, Simcenter 3D Acoustics BEM, Simcenter 3D Acoustics Transient BEM, or Simcenter 3D Noise and Vibration as the specified solver.
Simulation Navigator	Load Recipe Container node→right-click a load recipe node→Attach to Active Solution

How do I

Replace different FEM files with an Acoustics BEM ATV set

Learn more

ATV response workflow

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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ATV response, Simcenter 3D 2021.1 Series

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