NVH Response Analysis

LMS Virtual.Lab NVH Response Analysis

VL Noise and Vibration NVH Respons Analysis 01.jpg

LMS Virtual.Lab NVH Response Analysis is an easy-to-use, entry-level simulation tool for predicting the noise and vibration behavior of a component, sub-system or complete model under operational loading conditions. With transparent access to all available models and load data from CAE and testing, users can integrate the best available data mix at all times. Fast modal and FRF-based prediction solvers quickly analyze a multitude of design variants. NVH specific post-processing tools help the engineering team compare actual responses with pre-defined or imported targets and optimize noise and vibration behavior.

LMS Virtual.Lab NVH Response Analysis offers maximum flexibility when retrieving and applying load cases. The system accepts a multitude of load formats and types, derived from measurements, multibody or acoustic simulations, or generic loading sources. This includes structural forces, displacement excitations, and acoustic

loads. The latter can be derived from structural vibrations on panels using acoustic source quantification. Combining measured loads with virtual models results in a more realistic NVH simulation as well as better and more reliable design insights.

Engineers can easily set up NVH analysis runs with the template-based user interface, either starting from an FE model or using a test-based model. The solution also includes FRF and modal-based NVH response solvers to

compute system noise and vibration responses. This results in fast simulation runs to process numerous design options in a limited timeframe.

A wide variety of advanced post-processing tools help engineers investigate noise and vibration contributions of individual or grouped paths or modes to the final response and compare the response results with target data.

LMS Virtual.Lab NVH Response Analysis supports techniques to execute design modifications from manually triggered modification analyses to fully automated design space explorations in combination with LMS Virtual.Lab Optimization.

Features

Universal access to test and FE data for both model and excitation data
Numerous supported load data formats: frequency, rpm or time-dependent data for force, displacement, velocity, acceleration, volume velocity and volume acceleration
Fast modal and FRF-based forced response solvers
Modal-based FRF synthesis to determine transfer functions from modal data
Path and modal contribution analysis to determine the root cause of noise & vibration problems
Wide variety of 2D, 2.5D and 3D displays to analyze operational responses

Benefits

Transparent access to the best available test & CAE data at any time
Create templates that capture your analysis process and facilitate future calculations
Make predictions more quickly with embedded FRF and modalbased NVH response solvers
Increase response prediction accuracy using hybrid simulation: use measured loads with CAE or Test models
Better result visualization with various intelligent NVH post-processing indicators and interactive visuals
More insight into structural and acoustical contributions, path and modal contributions

Covering a range of industries, LMS application cases let you discover how LMS solutions help our customers solve their real-life engineering challenges.

Hybrid Modeling in Action at Atlas Copco

This case history clearly illustrates the potential of hybrid modeling techniques to come up with effective and detailed design modifications. It is clear that, although the approach is a CAE one, testing plays a crucial role in it. Instead of being focused on troubleshooting, as is often the case, the carefully planned testing program supports the entire CAE-based vibration optimization program by providing a set of comprehensive component models and reference data.

Noise Vibration H processes and technology 2

Tackling Tough NVH Challenges at BorgWarner

In working with design concepts early in development, BorgWarner uses LMS Sysnoise to simulate the performance of new transfer cases and predict their resulting sound signatures. The aim is to reduce reliance on prototype tests because of the time and expense of changing transfer case castings and reworking dies, which can take months to complete and cost thousands of dollars.

Opel Implements Hybrid FRF-Based Substructuring

Compressed development cycles and increased customer expectations in relation to the Noise, Vibration & Harshness (NVH) comfort of a car pressure automotive manufacturers to further extend the capability and efficiency of their NVH engineering process. To be able to meet these demands, Opel introduced FRF-Based Substructuring (FBS) and validated the practical use of this hybrid simulation method.

More cases:

DAF optimizes diesel engine performance with LMS Virtual.Lab

Brochures

Download the LMS Virtual.Lab Introduction Brochure

Download the LMS Virtual.Lab Noise And Vibration Brochure

Images


	Forced Response results displayed as model deformation and path contributions for fast problem assessment.		Modal results and synthesized FRFs.		FRF-based forced response analysis on test-based body model.

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