Technical papers

Using CFD flow fields to inform acoustic finite element models of complex mufflers with thermal and flow effects
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, Vibro-Acoustics CFD flow, complex mufflers, thermal and flow effects, CFD VA coupling
SEA Modeling And Validation Of A Truck Cab For Sound Package Optimization
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 definition…
Vibro-Acoustics
A hybrid Finite Element-Transfer Matrix method for the modeling of vibroacoustic systems with attached noise control treatment
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
Wind Noise Contribution to Vehicle Interior SPL
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
Low Transformation Temperature Welding Consumables For Residual Stress Management: Consumables Development And Testing Qualification
Residual stresses induced during joining are major contributors to the overall stresses in the vicinity of structural weld joints. Undesirable tensile residual stress is observed in low-carbon structural steel weld…
Welding & Assembly Low-Transformation-Temperature Welding Consumables, Martensitic Transformation, Phase-Induced Volumetric Expansion, Residual Stress Management, Compressive Residual Stress, Fatigue Strength, Microstructures, Microhardness
Low Transformation Temperature Welding Consumables for Residual Stress Management: A Numerical Model for the Prediction of Phase TransformationInduced Compressive Residual Stresses
Harmful tensile residual stresses are observed in structural steel weld joints as a result of the thermal strains between the solidified weld metal and surrounding base material. These harmful stresses, superimposed on …
Welding & Assembly Low Transformation Temperature Welding Consumables,Martensitic Transformation, PhaseInduced Volumetric Expansion, Residual Stress Management, Compressive Residual Stress, Numerical Analysis, Residual Stress Evolution with Time
A robust spot weld model for structural vibration analysis
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 the…
Vibro-Acoustics finite element analysis, spot weld, sensitivity, structural dynamics, robustness
Fully trimmed vehicle models with poroelastic finite element method, modelling technics
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 excitations…
Vibro-Acoustics
Predicting SC Acoustic Tests Using the Boundary Element Method
This paper focuses on how to effectively predict random acceleration spectra experienced during spacecraft (S/C) acoustic qualification tests representing the acoustic environment at launch by using a fully coupled…
Vibro-Acoustics
Acoustic Test Prediction and Correlation for the SGEO Satellite Platform STM Model
Spacecraft structural designs have to be designed and verified for a number of mechanical environments, namely:
  • Quasi-static loads
  • Sinusoidal vibration
  • Acoustic Noise
  • Shock…
    Vibro-Acoustics