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Technical papers


Steady-state analysis: Predicts the frequency response due to a steady state sources, including:

Multiple compact acoustic sources Sources with directivity (with BEM interface, CLF or Test) Handle complex shaped...
Vibro-Acoustics

Presentation Overview

What is system simulation and where it is used in marine applications? Transient and steady-state torsional vibration analysis Application to vibro-acoustics Conclusions
Vibro-Acoustics

Prepared for AIAA Aviation 

ASME Turbo Expo

Vibro-Acoustics

Noise in cargo ships has become an important topic as international regulations are increasing the constraints. Predicting the sound pressure level in crew cabins for a new ship and diagnose the effect of design...

Vibro-Acoustics


Flow within a duct strongly affects the propagation of acoustic waves. This effect must be addressed by the vibroacoustic modeling of duct systems that are subject to flow. The effective sound propagation speed in a...

CFD, Vibro-Acoustics

Increased environmental awareness has created the need in commercial shipping, in addition to established military requirements, to understand and manage structure-borne machinery noise radiated to water. Noise...

Vibro-Acoustics

Recent developments in the prediction of the contribution of wind noise to the interior SPL (Sound Pressure Level) have opened a realm of new possibilities. The main physical mechanisms related to noise generation...

Vibro-Acoustics

This paper is concerned with the development of a hybrid methodology to speed up finite element analysis in vibroacoustic applications. The approach aims at avoiding the finite element modeling of the noise control...

Vibro-Acoustics

Consumers and regulations drive the noise requirements to levels constantly decreasing. For vehicles, noise control strategies include the application of noise control treatments on the vibrating panels. The...

Vibro-Acoustics

Many actual muffler systems with complex geometry have large temperature variations and large variations in the flow field under normal operating conditions. Often perforated regions and other complex design elements...

CFD flow, complex mufflers, thermal and flow effects, CFD VA coupling
CFD, Vibro-Acoustics

A finite element spot weld is proposed. The model is only weakly sensitive to element size, in contrast to some existing models, for which predictions of the static and dynamic responses can be strongly sensitive to...

finite element analysis, spot weld, sensitivity, structural dynamics, robustness
Vibro-Acoustics

The automotive industry is currently expressing a strong need to understand more into details the influence of the trim parts on the acoustic response in the vehicle in the case of structureborne or airborne...

Vibro-Acoustics

After a first estimation based on statistics, the design loads for instruments are generally estimated by coupled spacecraft/instrument sine analysis once an FE-model of the spacecraft is available. When the design...

Vibro-Acoustics

Spacecraft structural designs have to be designed and verified for a number of mechanical environments, namely:

Quasi-static loads Sinusoidal vibration Acoustic Noise Shock

The environments are present during...

Vibro-Acoustics