Virtual Prototyping for Aero-Vibro-Acoustics
Addressing wind noise for overall vehicle quality
Wind noise is an important aspect of vehicle performance. It impacts interior comfort and perceived product quality, which directly affect the passenger’s experience. The successful deployment of vibro-acoustic simulation and the resulting improvements to vehicle acoustics have led to a reduction of interior noise from sources such as powertrain, tires and suspension. However, this results in a relatively greater contribution from wind noise to the vehicle interior. Because wind noise directly influences the passenger’s ability to communicate with other occupants or make use of hands-free devices or phones, it is considered an important product selection criterion and is consistently ranked as a top concern for overall vehicle quality.
Replace your costly Aero-Vibro-Acoustics tests with Virtual Prototyping
The growing speed and efficiency of Computational Fluid Dynamics (CFD) simulations result in greater accessibility to time-domain pressure distribution predictions. Turbulent flow can now be effectively simulated and processed to provide vibro-acoustic model excitations up to the higher frequencies that most strongly affect interior noise. The combination of CFD data and vibro-acoustic analysis as an ‘end-to-end’ solution for Aero-Vibro Acoustic (AVA) simulation reduces dependence on expensive wind tunnels, whose availability is very limited. Allowing designers to virtually model interior acoustics excited by turbulent pressure fluctuations enables design decisions to be made earlier in the design cycle, reducing the need for costly revisions in later design stages.
ESI’s VA One Aero-Vibro-Acoustic module automatically converts CFD pressure-distribution time histories from a wide range of formats into the appropriate Fluctuating Surface Pressure load or input power in the frequency domain. Both types of dominant excitation components, convective and acoustic, are derived from this CFD pressure data and applied to structures and fluids in the vehicle model to predict interior noise and support wind noise reduction and optimization through virtual design studies.
Benefits of ESI's Solution for Aero-Vibro-Acoustics
- Fewer expensive post-prototype modifications needed due to accurate prediction of flow-induced noise earlier in the design phase
- Easy-to-use tools and intuitive user environment offer seamlessly coupled methods, minimizing model building time and training
- Faster ROI and shorter learning curve is available through support infrastructure
- Proven customer success based on previous consulting projects
Read More: Aero-Vibro-Acoustic in Print.
