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Full Vehicle NVH
Access the Assemble, Analyze, NVH Tools, NVH Post, and Physics AI ribbons.
NVH Tools
Coarsen Mesh
Simplify a mesh by combining many small elements into a smaller number of larger ones.

Welcome
What's New
View new features for HyperMesh NVH 2024.1.
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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
  - Coarsen Mesh
    Simplify a mesh by combining many small elements into a smaller number of larger ones.
    - Coarsen a 1D Mesh
      Coarsen 1D elements and components to the given element size.
    - Coarsen a 2D Mesh
      Coarsen 2D components to the given element size.
  - Acoustic Cavity Meshing for Interior Noise
    Acoustic cavity meshing for interior noise generates a fluid volume mesh used to calculate the acoustic modes (or standing waves) inside the air spaces of a vehicle or similarly enclosed structural model.
  - Acoustic Cavity Meshing for Exterior Noise
    Acoustic cavity meshing for exterior noise generates a fluid volume mesh and boundary mesh used to calculate the acoustic modes, or standing waves, in the external air spaces of a powertrain, e-motor or similarly enclosed structural model.
  - Frequency Response Process
    Setup a frequency response analysis with a series of step-by-step process templates.
  - Macros
    Use the Macros tool to access pre-defined macros packaged with the NVH solution and also user-defined macros.
  - Templates
    Use the Templates tool to edit and test NVH templates used for creating lumped parameter (LP) models, multiple instances of one model transformed to a new geometric location, or loadcases.
  - Pack and Go
    Use the Pack and Go tool to package all project data (Assembly .xml files, Representation files, LP Templates, Loadcase files, Job files and CSV templates) for transfer to others or for archival.
  - Solver Deck Comparison
    Use the Solver Deck Compare tool for quick comparison of Main solver decks generated from the Analysis Manager or existing Main solver decks.
  - File Path Replace
    Use the File Path Replace tool for automatic mapping of modified and/or missing file paths and folders in the .xml file.
- Prepare Module
  Create, organize and manage the CAE parts.
- Post-Processing and Diagnostics
  Define radiation conditions and create emissivity models.
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.

Coarsen Mesh

Simplify a mesh by combining many small elements into a smaller number of larger ones.

An existing mesh may be finer and more complex than your simulation requires. This can result in the simulation, or other utilities that depend on existing elements, taking an unnecessarily long time to run, especially when your goal is to view real-time animations for NVH (Noise, Vibration, and Handling) or similar analyses.

When a mesh is coarsened like this, it is important to note that every node in the coarse mesh corresponds exactly to one of the nodes in the original mesh, although many nodes are removed, the ones that remain are still the same nodes from the original model. No locations or qualities are changed. Similarly, any nodes or points with special information, such as comments, in the 10th column of their deck will be preserved.