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Simcenter 3D
Acoustic Simulation

Simcenter™ 3D software offers a comprehensive solution to minimize noise and optimize product sound quality. Dedicated acoustic modeling features, efficient solvers , and easy-to-interpret visualization tools allow you to quickly gain insight into a design's acoustic performance for decoupled acoustic, coupled vibroacoustics, and aeroacoustics applications.

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 Solution Benefits

Accelerate acoustic generation and modeling

Deliver high-fidelity vibroacoustic simulations in the most efficient way

Faster design analysis iterations with CAD-CAE test associativity

Gain instant insights with specific acoustic post-processing

Providing a platform for multidisciplinary simulation

  • Accelerate acoustic simulation model creation from complex geometries, whether structural mesh model, CAD geometry or from scratch

  • Use fast and efficient FEM/BEM solvers to provide acoustic calculations faster

  • Effectively solve acoustics, vibroacoustics, and flow-induced noise issues from a single interface

  • Simulate acoustic performance for indoor, outdoor or mixed interiors

  • Accelerate various acoustic RPM calculations involving engines, gearboxes, and rotating components

  • Perform realistic acoustic simulation: anechoic boundary condition, porous finishing materials (hard and soft frames), acoustic source, lightning noise and more

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Advanced features such as surface wrapping, convex meshing, mesh thickening, and the ability to create hybrid (hexa-tetra) meshes help speed up acoustic meshing processes more than traditional preprocessors. The availability of multiple material models for structure and fluid and the wide range of boundary conditions and structural and acoustic loads allow you to configure your analysis efficiently.

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Simcenter 3D increases realism in your simulations by providing support for loading or font creation from test data and predecessor simulations of multibody or computational fluid dynamics (CFD). Simcenter Nastran® software is used to quickly solve complex indoor and outdoor acoustics problems, thanks to key features such as Automatically Blended Layer (AML) technology and Finite Element Adaptive Ordering (FEMAO), which allows using small fluid meshes with an ideal number of Degrees of Freedom (DoF) per frequency.

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Simcenter 3D connects seamlessly to computer-aided design (CAD), computer-aided engineering (CAE), and even test data. Any design modification can be easily introduced into the structural and/or acoustic model, eliminating multiple conversions between file formats and recreating models.

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Simcenter 3D provides intuitive, easy-to-interpret post-processing tools for investigating noise such as sound pressure level (SPL), acoustic power, or directivity. Path, modal, and panel contribution analysis helps you quickly identify important noise sources and their propagation.

The Simcenter 3D acoustics solution is part of a larger multidisciplinary simulation environment and is integrated with the Simcenter 3D Engineering Desktop at the core for centralized pre- and post-processing for all Simcenter 3D solutions. This integrated environment helps you achieve faster CAE processes and streamline multidisciplinary simulations that integrate acoustics and other disciplines, such as gear noise analysis from motion solutions, or NVH and vibroacoustics analysis that require structural or flow-induced loads.

Sectors

Industry applications

Aerospace and Defense

Automotive and transport

Consumer goods

Industrial machinery

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As noise can affect health and a silent product is often perceived as superior quality, companies are adopting efficient processes and tools to optimize the noise performance of their products.

With Simcenter 3D, aviation engineers can predict cabin noise generated by turbulent boundary layers (TBL) in the fuselage or by aeroacoustic noise coming from the environmental control system (ECS). External noise can be solved using Edge Boundary Element Method (BEM) and FEM solvers . Spacecraft engineers can reduce the risk of their acoustic verification tests by virtually evaluating them in Simcenter 3D.

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During vehicle development and enhancement programs, Simcenter 3D capabilities can provide noise, vibration, and harshness (NVH) engineers with valuable insight into acoustic, vibroacoustic, and aeroacoustic noise contributions in the vehicle cabin and external environment.

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Building high-quality, powerful speakers, quiet vacuums and washing machines, and other noiseless consumer goods requires advanced noise engineering and sound characterization capabilities provided by Simcenter 3D.

Simcenter's 3D acoustic modules provide the capabilities needed to evaluate the noise radiated by the machine, including capturing the effect of encapsulations with sound treatments.

The acoustic capabilities of Simcenter 3D can be used to study complex underwater radiation from ship hulls, propellers, and submarine hull reflections of sonar waves.

Módulos

 

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Simcenter 3D Meshing for Acoustics software helps create meshes for FEM and BEM acoustic analysis. The module provides advanced, easy-to-use functionality for creating an acoustic fluid mesh for both indoor and outdoor acoustic applications from an existing structural mesh or CAD geometry.

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Simcenter Nastran Advanced Acoustics software provides support for standard loads and boundary conditions and key technologies such as AML and FEMAO to quickly solve acoustic simulations. It is suitable for studying component acoustic radiation and pass-by noise from complete vehicles, transmission loss from pipeline systems such as intakes and exhausts or mufflers, and transmission loss from panels.

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Simcenter 3D Acoustic Transfer Vector software supports acoustic transfer vector (ATV) computation, expressing the sensitivity of the pressure response in a virtual microphone per unit normal velocity at field points on a radiating surface. It can be reused to quickly predict the acoustic response to any surface vibrations. Likewise, vibroacoustic transfer vectors (VATV) express the sensitivity of microphone pressures to the unitary force applied at points in a structure. Furthermore, VATV can be quickly reused to predict the acoustic response to any force load. Modal participation factors (MPFs) can also be used with ATVs in the context of modal acoustic transfer vector (MATV).

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Simcenter 3D Aero-Vibro-Acoustics software supports the creation of aeroacoustic sources close to turbulent noise emitting flows and allows to calculate their acoustic response in the external or internal environment; for example, for noise from heating, ventilation, and air conditioning (HVAC) and environmental control system (ECS) ductwork, train boogies and pantographs, cooling fans, ship and aircraft propellers, and much more. The product also allows defining the wind loads that act on the structural panels, leading to a vibroacoustic response; for example, in a car or airplane cabin.

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Simcenter 3D Load Identification allows to obtain accurate dynamic loads of a structure. Operational loads are very important for accurate response prediction, but are often impossible or difficult to measure directly.

 

This product offers several ways to identify operating forces from measured data, either by the mounting stiffness method or the inverse matrix method. For example, in an inverse matrix method, operational vibration data can be measured under operating conditions and transfer functions (FRFs) can be measured under controlled laboratory conditions or obtained from simulations. This data is then combined into a reverse load identification case.

 

In addition, Simcenter 3D Load Identification supports a modal expansion solution to create enriched vibration results in a complete FE model based on measured vibrations at just a few points.

 

Finally, a second method for deriving structural surface vibrations is provided through inverse numerical acoustics, in which pressure responses measured at just a few points close to the structure are used together with acoustic transfer vectors to identify total surface vibrations. The obtained vibration field can then be used for acoustic radiation analysis.

 

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The Simcenter 3D Environment for BEM Acoustics software supports the generation of a ready-to-run acoustic or vibroacoustic simulation model for direct BEM and indirect BEM and provides comprehensive post-processing tools to analyze the acoustic or vibroacoustic results.

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The Simcenter 3D Acoustics BEM solver is used to predict the acoustic response in closed and unbounded domains using a mesh only for the boundary of the fluid domain. The vibroacoustic analysis is supported by coupling the acoustic fluid with a structural modal model. Structural vibrations can also be imposed on the BEM fluid using weak vibroacoustic coupling.

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Simcenter 3D Acoustics Accelerated BEM software provides hierarchical matrix (H-Matrix) BEM and fast multipole (FM) BEM solvers to extend the computational limits of standard solvers . These solvers are suitable for outdoor acoustics of large structures such as vehicles and large engines, aircraft, ships, submarines, as well as high frequency applications such a ultrasonic sensors.

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Simcenter 3D Acoustics' time domain BEM software enables BEM solutions to resolve transient acoustic and vibroacoustic phenomena. In opposition to frequency domain based BEM solvers , Simcenter 3D Acoustics Time Domain BEM Solver offers the possibility to solve problems involving short term excitation impulsive signals in time domain. This BEM solver is suitable for applications such as parking sensor design and door slam analysis, for example.

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​Simcenter 3D Acoustics HPC software allows you to run acoustic FEM or BEM calculations in multiprocessing mode on the parallel hardware of your choice. Parallel calculation sequences are implemented using the message passing interface (MPI) communication standard. In the case of FEM vibroacoustics, this product incorporates Simcenter Nastran's Distributed Memory Parallelization (DMP) feature.

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Simcenter 3D Ray Acoustics is used to predict acoustic responses up to very high frequencies and very large geometries, in closed and unlimited domains. Unlike finite element method (FEM) or boundary element method (BEM) acoustic solvers , ray acoustic solutions are not based on a fine domain discretization. Therefore, the solution is not limited by an upper frequency limit or the size of the model and the resolution is done orders of magnitude faster compared to FEM or BEM. Simcenter 3D Ray Acoustics integrates an engineering environment into Simcenter 3D to generate and post-process a ray acoustic model, as well as a ray acoustic solver , which is the CSTB ICARE solver.

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Module benefits:

  • Start from a structural FEM model or CAD geometry

  • Accelerate the acoustic meshing process for complex geometries

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Main features:

  • Hybrid polygon-based thickening, hole filling, and rib removal tools

  • Interior and exterior surface wrapping technology based on CAD or CAE model input

  • Easy creation of convex outer boundary surface to build FEM meshes for outdoor acoustics

  • Dominant hexadecimal hybrid hexa and tetra mesher for fluid volumes facilitating efficient solution

  • Shell mesh thickening (reverse of mid-surface) to derive boundary surfaces of fluid cavities, which is useful for muffler and other fluid FEM meshes

Module benefits:

  • Runs vibroacoustic simulations (SOL108/SOL111) for indoor or outdoor noise

  • Study outdoor acoustics with lean FEM models thanks to built-in AML technology

  • Efficiently simulate broadband acoustic problems using the adaptive FEMAO solver

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Main features:

  • Supports standard loads and boundary conditions, as well as specific acoustic boundary conditions such as duct modes and acoustic diffuse field (random) loads

  • Pressure loads on structural surfaces from other acoustic or CFD analysis

  • Porous and temperature-dependent fluid materials, average convective flow effects, frequency-dependent surface impedance, and transfer admittance between pairs of surfaces

  • Calculate sound pressure, intensity, and power for virtual microphones located inside or outside the mesh fluid volume

Module benefits:

  • Use ATV to calculate the noise of rotating machines with loads of several revolutions per minute (RPM) up to 100 times faster

  • Use VATV to quickly assess cabin noise due to various flow-induced pressure loads load cases such as wind loads and turbulent boundary layers

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Main features:

  • ATV results are efficiently stored in a Nastran (op2) or Sysnoise (ssndb) result file

  • ATV can be interpolated when used in a forced response context

  • Evaluate acoustic pressure and power and panel, network, and mode contributions to ATV response

 

Module benefits:

  • Conservative mapping of CFD pressure results to acoustic or structural mesh

  • Equivalent aeroacoustic surface dipole sources

  • Equivalent aeroacoustic fan sources for tonal and broadband noise

  • Wind loads, using semi-empirical turbulent boundary layer models or pressure loads mapped from CFD results

  • Derive aeroacoustic sources based on lean surface pressure for stationary and rotating surfaces

  • Provides easy-to-use, scalable load preparation for aerovibroacoustic wind noise simulations

  • Import binary files with load data directly into Simcenter Nastran for response calculation

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Main features:

  • Conservative mapping of CFD pressure results to acoustic or structural mesh

  • Equivalent aeroacoustic surface dipole sources

  • Equivalent aeroacoustic fan sources for tonal and broadband noise

  • Wind loads, using semi-empirical turbulent boundary layer models or pressure loads mapped from CFD results

Module benefits:

  • Determine operating forces or vibrations that are difficult or impossible to measure directly

  • Get a more realistic simulation by applying more accurate loading

  • Combine measured loading data with FE simulations

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Main features:

  • Assembly method for estimating assembly forces by combining operational vibration data on each side of the assembly and assembly stiffness data

  • Inverse matrix method by combining operational measurements and transfer functions based on all measured data or a combination of operational measurements and simulation data

  • Simple application and reuse of forces or vibrations identified in the simulation model

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Module benefits:

  • Provide a user-friendly interface to simplify the creation of acoustic BEM models for standard and accelerated BEM solvers

  • Supports pure acoustic issues as well as weak or fully coupled vibroacoustic response via modal-based framework definition

  • Leverage dedicated post-processing capabilities to improve engineering insight and user productivity

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Main features:

  • Provide all standard structural and acoustic loads and boundary conditions to accurately describe your vibroacoustic issues

  • Prepare deterministic and random acoustic and vibro-acoustic analysis

  • Standard post-processing of acoustic results such as acoustic pressure and power and structural vibrations

  • Dedicated diagnostic graphs showing panel contributions and structural modal contributions to acoustic pressure or power

Module benefits:

  • BEM solvers , fast and efficient to solve purely acoustic and vibroacoustic problems

  • A multitude of acoustic and structural loads and boundary conditions are supported for an accurate description of your vibroacoustic simulation model

  • Automatic BEM model corrections for free and seam edges

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Main features:

  • Direct and indirect decoupled acoustic solutions

  • Indirect, loosely coupled and strongly coupled vibroacoustic solutions

  • Deterministic and random acoustic and vibroacoustic analysis

  • Returns standard acoustic and structural response results

  • Provides structural panel contributions and modal contributions to acoustic pressure or power Solutions Guide | Simcenter 3D for acoustic simulation

 

Module benefits:

  • Provides faster calculations for large BEM models (larger geometry and/or higher frequencies)

  • Requires less system memory than standard BEM

  • Supports uncoupled acoustic response as well as coupled vibro-acoustic response simulation

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Main features:

  • Includes a fast iterative multipole solver as well as a direct hierarchical H-Matrix solver

  • Both solvers support parallel computing, including up to four processes for free, or using more than four processes, when combined with Simcenter 3D Acoustics High Performance Computing (HPC) software

  • Supports the convection effect of a medium (uniform) flow on acoustic wave propagation

 

Module benefits:

  • Allows accurate modeling of transient infinite domain problem

  • Provides solutions to purely acoustic and vibroacoustic problems

  • Provides fast and efficient time-domain solver , also for large models

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Main features:

  • Dedicated Simcenter 3D Acoustics Transient BEM solver environment for time-domain BEM calculations, including two analysis types: acoustic transient and vibro-acoustic transient

  • Supports various loads and boundary conditions:

    • ​Acoustic transient: acoustic monopole, plane wave, infinite plane, acoustic absorber, transfer admittance

    • Transient vibro-acoustics: force applied to the structure (with defined mode representation), pre-computed vibrations, infinite plane, acoustic absorber, transfer admittance, panel Solutions guide | Simcenter 3D for acoustic simulation

Module benefits:

  • Accelerates acoustic calculations using multithreading , shared memory parallelization (SMP), multiprocessing, and DMP

  • This product supports high performance computing for Simcenter 3D Acoustics FEM and BEM solvers

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Main features:

  • Solvers can run in high-performance computing mode on multi-node clusters as well as on multi-core workstations

  • Allows you to solve high frequency problems with DMP for which near linear parallel speed can be expected

Module benefits:

  • Solve high-frequency acoustic simulations for large models in a fraction of the time required with FEM or BEM solvers

  • A coarse mesh can be used as it captures model geometry, simplifying model creation

  • Standard acoustic loads and boundary conditions are supported for accurate description of the simulation model

  • Advanced results and post-processing to explore ray path arrivals or sound quality criteria

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Main features:

  • Returns acoustic results in both frequency and time domains

  • Simulates ray propagation of acoustic waves with adaptive beam-tracking technology

  • Accurately simulates reflections on curved surfaces despite coarse mesh discretization

  • Capture multi-order diffraction effects and creeping waves

  • Captures late reflections and diffusion effects with particle tracking technology

  • Supports standard acoustic loads including point source directivity

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Simcenter 3D Meshing for Acoustics

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Simcenter Nastran Advanced Acoustics

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Simcenter 3D Acoustic Transfer Vector

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Simcenter 3D Aero-Vibro-Acoustics

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Simcenter 3D Load Identification

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Simcenter 3D Environment for BEM Acoustics

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Simcenter 3D Acoustics BEM solver

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Simcenter 3D Acoustics Accelerated BEM solver

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Simcenter 3D Acoustics Time Domain BEM solver

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Simcenter 3D Acoustics HPC

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Simcenter 3D Ray Acoustics

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