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LMS Virtual.Lab Acoustics – Options   LMS Virtual.Lab Acoustics – Options   LMS Virtual.Lab Acoustics – Options
 

LMS Virtual.Lab Acoustics – Options


Mesh Coarsening

The innovative Mesh Coarsening technique for exterior meshing can be compared to wrapping the structure with a rubber sheet: small surface features are smoothed, which dramatically reduces the size of the models. The model features that have a significant impact on the acoustic response remain in place, which safeguards the quality and accuracy of the acoustic simulation. Using this meshing approach, users can create complex acoustic models in hours rather than weeks.

Cavity Meshing

The Cavity Meshing module significantly accelerates the acoustics meshing process for FEM-based acoustic simulations. The product creates a high quality HEXA dominant interior volume mesh starting from a general structural FE mesh.

Mesh Based Design

With the Mesh Based Design tool, LMS Virtual.Lab users can directly apply structural modifications to their FE model and change mesh properties such as increasing the shell thickness or adding ribs. Using the appropriate FE driver for Nastran or ANSYS, Virtual.Lab recalculates the structural modes and automatically updates the acoustic results without having to resolve the complete acoustic equations. These integrated FE mesh manipulation and editing tools significantly increase productivity.

Mesh Editing

This module delivers advanced functionality for stitching finite element meshes together or foot-printing areas in existing finite element meshes.

Mesh Morphing

LMS Virtual.Lab Mesh Morphing allows engineers to modify and morph existing meshes, independently from the functional performance attributes they are used for, without the need for remeshing, while preserving model integrity and connectivity. Engineers can perform analyses at the concept phase by morphing a predecessor model to the target style, resulting in better design directives much earlier in the development process, even before the first complete CAD models become available.

Path and Modal Contribution Analysis

This module allows engineers to quickly investigate and identify the major sources that contribute to a specific noise problem. It delivers insights in the dominant transfer paths or modes, assesses the noise and vibration contribution of individual system parts and supports users in suggesting the right design modifications.

Load Identification Analysis

The Load Identification Analysis module calculates operational forces acting on a system in either a direct way, an inverse way or through a combination of both methods. In the direct or mount stiffness method, the load is computed by multiplying the difference in operating displacement over a mount with its dynamic stiffness. The inverse method computes the loads by inverting the FRF matrix between the load application points and the operational response locations, and by multiplying with the operational responses.

Panel Contribution Analysis

The Panel Contribution Analysis module allows users to post-process panel contributions. Panels are defined as groups of elements that radiate noise to a target location. Specific visualization capabilities are available that allow engineers to identify the panels that contribute most to specific noise problems and to investigate structural design modifications.

High Speed BEM Solver

The High Speed BEM solver module starts by computing three to four ‘master’ frequencies. From this point, it predicts the results for all the remaining frequencies using an intelligent mathematical process based on the Padé expansion. Although solving each ‘master’ frequency is more time-consuming compared to conventional BEM, the computations at the ‘slave’ frequencies are dramatically faster. Overall, this module speeds up acoustic radiation calculations up to a factor of 30.

Acoustics x-node Multiprocessing Solver

This solver allows performing the acoustic solution on multiple nodes (multi CPUs or multiple computers in a network). Different types are supported applicable to different types of problems including frequency-level, matrix level, thread level and combination of the previous. In this way, very large models can be solved fast.

Modification Prediction

Using the Modification Prediction module, users can very quickly analyze modified designs and simulate the acoustic behavior of a large number of design options in a limited time. The module applies the design modification on the structural modes, and assesses the influence of structural changes on the overall noise performance without having to resolve the complete structural or acoustic equations.

Optimization

LMS Virtual.Lab Optimization provides a set of powerful capabilities for single and multi-attribute optimization. Through Design of Experiments (DOE) and Response Surface Modeling (RSM) techniques, engineers gain a rapid insight in all the possible design options that meet their requirements. Using advanced optimization routines including manufacturing for six sigma, LMS Virtual.Lab automatically selects the optimal design, taking into account its sensitivity to real-world variability, while meeting the strictest robustness, reliability and quality criteria.
 
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