What's New

View new features for NVH 2022.2.

NVH Director 2022.2 Release Notes

Deterministic Optimization workflow in Noise, Vibration and Harshness (NVH): A new option in the Analysis Manager to define optimization set-up for the selected analysis. The new options allow you to create design variables for materials, gages, connections and modal parameters. There are options to create design responses, constraints and objectives for the user-defined loadcases and submit the optimization for OptiStruct. The complete optimization set-up can be saved in an Assembly XML file for review and reuse. A new post-processing utility is developed to post-process the optimization results. A very powerful, efficient and end-to-end workflow for deterministic optimization for pre-processing, solving and post-processing.

Deterministic Optimization

Enhancement to define mass and volume as design responses. This allows you to set-up NVH optimization problems for vehicle weight reduction initiatives while maintaining vehicle NVH performance.
Enhancement to define the relation between design variables. This allows you to link and maintain the relation between design variables for optimization to objectives and constraints. For example, mount rates for suspension, engine, and can have the same values between symmetric sides.
Enhancement to read the sensitive variables from Design Sensitivity Analysis and define them as design variables for optimization.

Design Sensitivity Analysis

Pre-processing: Enhancement to define materials and properties to be defined as design variable for sensitivity analysis.
Post-processing: Enhancement to export sensitive variables for a particular response/frequency in a separate .csv file. This .csv file can then be imported in the optimization feature to define these as design variables.

NVH Process Managers

Migration of NVH Process Managers in HyperWorks NVH to a new framework to improve the user experience in HyperWorks NVH.

Modal FRF

Enhancement to convert the NVH responses from displacement to velocity to acceleration, and vice-versa.
Enhancement to calculate derived quantities for NVH responses, such as rms, rss, and average for the frequency range of interest.
Enhancement to define multiple subcases.

Issue related to displacement transfer functions in FRF-to-CDS utility.
Issue related to Modal Assurance Criteria (MAC) calculation for modal results in cylindrical coordinate systems.

Deterministic Optimization Workflow: The Deterministic Optimization Workflow is a very powerful, efficient end-to-end workflow for pre-processing, solving, and post-processing. In the Analysis Manager, Deterministic Optimization defines the optimization setup for the selected analysis. Use this option to create design variables for materials, gages, connections, and modal parameters. There are options to create design responses, constraints, and objectives for the user-defined loadcases, and submit the optimization to OptiStruct. You can save the complete optimization setup in an Assembly XML file for review and reuse. A new post-processing utility post-process the optimization results.

NVH Preferences: The NVH preferences supports team preferences and user preferences, providing efficient and seamless coexistence and usage of team and user preferences from a single preference file.
Model Correlation: Support for LCS from test UNV files in MAC calculation.
U-joint Connection: Support to specify plunging mass in U-joint connections.
Workflow Improvement: Workflow improvements for usability when creating and handling local coordinate systems, response point manager, frequency set manager, batch modal check, and batch model reduction.

Optimization in Model Correlation
Flexible Rim Support in CDTire
Non-linear stiffness (Force Vs Deflection and Frequency Vs Stiffness) of engine mounts in Mounts Optimization

Optimization in Model Correlation: New option in Model Correlation utility to set-up optimization set-up for model updating of the simulation model to improve the correlation. Poor modal correlation between test-simulation results can be possibly improved by updating the simulation model. The new option of optimization allows you to create design variables in the simulation model, specify relevant objectives and constraints for the necessary correlation values and submit the optimization run.
Flexible Rim Support in CDTire: New option to consider flexible rim in CDTire handling. This advanced feature automatically creates connection between CDtire and Flexible rim, and allows you to study the effect of rim dynamics on NVH responses.
Non-Linear Stiffness (Force Vs Deflection and Frequency Vs Stiffness) of engine mounts in Mounts Optimization: New feature to specify non-linear stiffness of mounts in terms of Force Vs Deflection or Frequency Vs Stiffness in Mounts Optimization utility. This allows you to simulate real-life stiffness behavior of engine mounts for prediction for mount displacements and reaction forces for different operating conditions.
General Signal Processing for aero-acoustics simulations: New feature for general signal processing to predict NVH responses for aero-acoustic usecases.

Mounts Optimization: Enhancements in defining stiffness based constraints for engine mounts optimization in addition to existing frequency based constraints.
Model Correlation: Enhancement to support test UNV files with modal results partial directions by automatically identifying the directions with result data and use it for calculation of MAC.

Issue in identifying the subcase IDs in order cut analysis for result files from optimization run.