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Full Vehicle NVH
Access the Assemble, Analyze, NVH Tools, NVH Post, and Physics AI ribbons.
Post-processing and Diagnostics
Define radiation conditions and create emissivity models.
Energy Distribution
Visualize the distribution of energy within a full vehicle NVH model to understand what components are dominating the vehicle response.

Welcome
What's New
View new features for HyperMesh NVH 2026.
Get Started
Learn the basics and discover the workspace.
Tutorials
Discover NVH functionality with interactive tutorials.
Full Vehicle NVH
Access the Assemble, Analyze, NVH Tools, NVH Post, and Physics AI ribbons.
- Assembly
  Learn how to create, open, import and save models.
- Analysis
  Set up the simulation model, materials, domains and boundaries.
- NVH Tools
- Prepare Module
  Create, organize and manage the CAE parts.
- Post-processing and Diagnostics
  Define radiation conditions and create emissivity models.
  - Load an NVH Utility
  - Integrated Diagnostics
    Calculate a response, perform contribution analysis, plot results, and perform diagnostic studies and study response changes.
  - Modal Participation
    Plot modal/panel participation curves from an OptiStruct .h3d file or an MSC Nastran .f06/.pch file.
  - Grid Participation
    The Grid Participation utility allows you to plot panel grid participation results and then use advanced scaling contour capabilities to isolate key contributing areas.
  - Energy Distribution
    Visualize the distribution of energy within a full vehicle NVH model to understand what components are dominating the vehicle response.
    - Energy Distribution - Load
      Load an H3D or OP2 file and perform the result selection.
    - Energy Distribution - Display
      After loading a file, select a method to display the energy contribution data.
    - Energy Distribution - Study
      After plotting the energy contribution curves, perform a Partial Sum, Modify Energy, or Energy Overlay response study .
  - Transfer Path Analysis
    Identifies the complex contribution of the excited structure through attachment points to a response in the responding structure.
  - Design Sensitivity Analysis
    Design sensitivity represents a change in response with respect to a change in a design variable, which is typically used for optimization.
  - Order Analysis
    Generates and post-processes engine order related data from an OptiStruct or Nastran frequency response analysis that contains either RPM-based loading subcases or order-based loading subcases.
  - Modal FRF
    Calculates a frequency response based on modal results.
  - Model Correlation
    The Model Correlation utility determines the degree of similarity or correlation between two sets of results.
  - Radiated Sound
    The Equivalent Radiated Sound utility post-processes the results of exterior structure-borne radiated sound.
  - Global Modes
    Identifies global modes from an OptiStruct or Nastran modal analysis.
  - Flow Induced Noise/General Signal Processing
    The General Signal Processing utility processes the time domain pressure results from CFD simulations and visualizes the results in both the time and frequency domain.
  - Green House Noise
    Post-process the pressure result of a vehicle panel obtained from ultraFluidX.
  - Mount Optimization
    Predicts powertrain rigid body mode frequencies and kinetic energy distribution, which play a critical role in optimizing the mount stiffness and layout configuration, by decoupling powertrain rigid body modes and reducing vibration transmission.
  - Optimization, RBDO
    Optimizes sensitive parameters for multiple sample analysis results using the RBDO or Deterministic approach.
  - Multiple Sample Analysis
    Post-process results from a Multiple Sample Analysis, including plotting a spread of responses (+/-95% and mean).
  - Deterministic Optimization
    Reads results from an OptiStruct optimization run and processes the results to review the overlay of the NVH responses, baseline versus optimized. Compare changes in the design variable values, baseline versus optimized.
  - Display Options
    Customize plots using the following options
  - Filter Contributors
    Filters contributors to a smaller set of data.
High Frequency NVH
High frequency NVH is an implementation of Statistical Energy Analysis (SEA), and is used to predict and analyze the vibration and acoustic response of complex dynamic systems.
Squeak and Rattle
Create and evaluate evaluation lines and optimize interfaces to eliminate squeak and rattle issues.

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Energy Distribution

Visualize the distribution of energy within a full vehicle NVH model to understand what components are dominating the vehicle response.

Energy Distribution in a Full Vehicle Model

The model is typically visualized as a hierarchy of subsystems and components, allowing you to view and compare energy results in a likewise hierarchical way.

Different components may be represented using different types of models, allowing you to view and compare the energy of a finite element model and modal-based model.

Bushings and mounts often have higher levels of energy to show the energy associated with connections at a proper level.

To meet the needs described above, the following comparator groups are created to ensure that the energy comparison within the group makes sense. Typically, energy results from finite element solvers are output for elements and CMS SEs, which can be difficult to relate to the subsystem and component they belong to. As a result, a set of module and connection ID mapping files are used to map the raw solver results to the appropriate module or components at the specific comparator levels. The module and connection ID mapping files can be automatically generated as a part of the analysis job package, if the frequency response analysis job is set up using the Analysis Manager in the NVH Director.


Contributor Type	Comparator Group Level
	System Mode	Subsystem (L1)	Component (L2)	Contributor (L3)	Element (L4)
FE	N/A	Sum to Module next to root	FE Module - sum of all comps	FE comp 1	FE element 1
				FE comp 2	FE element 2
				FE comp 3	FE element 3
CMS SE	N/A	Sum to Module next to root	CMS SE Module - sum of all modes	CMS SE mode 1	N/A
				CMS SE mode 2	N/A
				CMS SE mode 3	N/A
Connections	N/A	Sum of all connections	Connections owned by modules	Connector element 1	N/A
				Connector element 2	N/A
				Connector element 3	N/A
System Modes	System mode 1	N/A	N/A	N/A	N/A
	System mode 2
	System mode 3