Simcenter 3D Response Dynamics provides a platform to analyze system response under dynamic loading, i.e., when an impact, transient, frequency (harmonic), random (PSD), or response (shock) spectrum excitations are applied. Dynamic analysis defines undesired stresses and vibrations resulting in possible failures and system fatigue. This product is also needed for multi-discipline solutions considering dynamic loads from Electromagnetic, Motion, and Thermal Flow domains. Shared Memory Parallel (SMP) processing is included as well as basic dynamic solvers for modal analysis:

-Nastran Real Eigenvalues (SOL 103): natural frequencies and free vibration modes without damping.
-Nastran Response Dynamics (SOL 103): normal modes, attachment modes, constraint modes, distributed attachment modes.
Simcenter 3D Response Dynamics has dedicated tools for multi-CAD assembly pre/postprocessing, structural and vibro-acoustic meshing, Modal Correlation and Sensitivity-based Model Updating, connections modeling, dynamic loads mapping, Superlements to reduce the model size, and much more. Various add-ons with powerful capabilities for NVH analysis, rotor dynamics, and correlation with real measurements to validate and enhance FE results can be included optionally.
Prerequisites: Simcenter 3D Structures. Solvers included in Simcenter Nastran Advanced Dynamics may be required.

Simcenter 3D provides two add-ons specifically for Noise, Vibration, and Harshness which helps to create, evaluate and enhance NVH performance of entire systems and large assemblies.
Simcenter 3D Noise and Vibration Modeling is a dedicated product for hybrid Noise & Vibration engineering which gives access to Noise and Vibration calculations with combination of “reduced” representations of FE components, such as Mode Sets, Acoustic Transfer Vectors (ATV, VATV, MATV) sets, Frequency Response Functions (FRF) sets etc. This allows reducing model size and speed-up response simulation without losing accuracy settings. In addition, Simcenter 3D Noise and Vibration Modeling offers test and previous simulation (Motion, Electromagnetics, CFD) load mapping onto vibro-acoustic model for obtaining realistic and multi-discipline results.
Simcenter 3D Noise and Vibration Response performs forced response analysis of a component described by a set of simulated/ measured modes or Frequency Response Functions (FRFs). It allows customers to compute Modal based forced response or FRF based forced response without access to advanced Nastran solvers as separate product, as there are necessary solvers included into Simcenter 3D Noise and Vibration Response:
-Direct Frequency Response Functions (SOL 108)
-Modal Frequency Response Functions (111)
-Acoustic Frequency Response Functions (Ray Acoustics)
The forced response results can be used in NVH and Acoustic analysis. FRF based response results can be used for Transfer Path Analysis (TPA), while Modal Based Forced Response results are meant for exterior acoustic radiation simulations based on Acoustic Transfer Vectors (ATV, modal ATV).
Prerequisites: Simcenter 3D Structures. For TPA and ATV-based computations Simcenter Noise & Vibration Modeling is needed.

Simcenter 3D provides a wide range of tools to perform uncoupled acoustics, coupled vibro-acoustics and aero-acoustics. A multi-discipline approach makes it possible to integrate excitations from Electromagnetics and Motion for evaluating structural and acoustic response in the same model.
Simcenter Nastran Advanced Acoustics includes Direct Frequency Response Functions (SOL 108) and Modal Frequency Response Functions (SOL 111) solvers to perform vibro-acoustic simulations for interior or exterior noise together with Acoustics outputs. Besides standard loads and boundary conditions, Simcenter Nastran Advanced Acoustics provides such technologies as Anechoic nonreflective boundary (AML) and Finite element method adaptive order (FEMAO) to solve acoustic model faster.
Simcenter Nastran Advanced Acoustics enables users to define porous, temperature-dependent fluid materials, and calculate mean convective flow effects, frequency-dependent surface impedance and transfer admittance between pairs of surfaces. In addition, this tool can compute sound pressure, intensity and power for virtual microphones located inside or outside the meshed fluid volume.
Prerequisites: Simcenter 3D Structures AND Simcenter 3D Meshing for Acoustics AND Simcenter Nastran Dynamic Response OR Simcenter Nastran Advanced Dynamics.
Simcenter 3D Meshing for Acoustics contains tools to create acoustic fluid mesh for FEM and BEM (Boundary Element Method) acoustic analysis. Users can mesh both interior and exterior acoustic components, starting from CAD geometry or existing structural mesh. Simcenter 3D Meshing for Acoustics provides convex meshing, mesh wrapping, hex dominant meshing, acoustic mesh and much more. Mesh quality checking allows to improve and accelerate meshing process for complex geometries.
Prerequisites: Simcenter 3D Structures
Simcenter 3D Acoustic Transfer Vector provides unique technology of computing and implementing ATVs, that serve as an equivalent acoustic representation of the fluid inside vibro-acoustic model. Using ATVs allows to speed-up vibro-acoustic solutions by factor of 10 to 100, especially focusing on machines radiation: motors, engines, compressors, pumps. ATV can be interpolated when used in a forced response context. For that reason, Simcenter 3D Acoustic Transfer Vector is recommended to use together with Simcenter 3D Noise and Vibration Modeling which gives access to mixed representations of FE components, including ATV, VATV, MATV representations.
Prerequisites: Simcenter 3D Structures AND Simcenter Nastran Advanced Acoustics