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Mantovani, Maurizio
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Integrated Virtual Approach for the Optimization of Vehicle Sound Packages

Rieter Automotive Management AG, Switzerland-Vijay Ravinath, Maurizio Mantovani, Claudio Bertolini, Davide Caprioli
Published 2009-01-21 by The Automotive Research Association of India in India
Generally all OEMs have a distinctive approach in designing their sound packages. Considering the complexity and combination involved in this process, there is no general valid scheme, although there tend to be some common blocks. Also as automotive manufacturers face strong demands to cut CO2 levels there is a trend to reduce prototypes and introduce limitations on weight of sound controlling materials. The supplier of the sound package must therefore be able to support the OEMs in taking design decisions early, quickly and based just on drawings, or even just on sketches in the concept phase.A proposed way forward in designing fast and cost-effective sound packages is by skillfully combining target setting, material characterization measurements, virtual prototyping and optimization tools.The solution should not only be acoustically effective, but also lightweight and cheap. Material characterization is dictated by design methodologies that allow accurate and efficient physical representation of not only damping material, in terms of their mechanical properties, but as well of porous materials in terms of their acoustic absorption and transmission properties. At material and…
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Functional and Material Acoustic Optimization integrated into Underbody Systems for Vehicle Performance Improvement

Rieter Automotive Systems-Maurizio Mantovani, Dirk Lehmann
Published 2007-05-15 by SAE International in United States
The first applications of plastic panels in the underbody targeted weight savings (elimination of the PVC coating) and aerodynamic drag reduction.The potential for the integration of acoustic functions in such new elements, addressing both interior and exterior noise, was readily recognized and demonstrated in several studies. These also pointed out the synergic interaction of the new elements with common systems and components of the sound package.While it was rather straightforward to define an acoustic design and optimization process, based on material modeling combined with component, system and vehicle SEA and FEM simulation, it also became clear that the integration of acoustic functions involved many problems that needed to be addressed in a multidisciplinary approach. This must consider the underbody elements as a part of a system having to fulfill functional requirements related to exterior and interior noise, aero-acoustics, aerodynamics for drag reduction and driving stability, thermal protection, thermal management in the engine compartment and in the tunnel area, protection of the body, assembly and durability. The harsh environment involves development of materials able to stand…
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Prediction of the Sea Input Parameters for the Sound Package

Honda R&D Co., Ltd.-Kazuhito Misaji, Kuruhara Yuji, Hiroko Tada, Yoshihiro Noguchi, Tsuyoshi Yamashita
Rieter Automotive-Maurizio Mantovani
  • Technical Paper
  • 2002-08-0437
Published 2002-11-28 by Society of Automotive Engineers of Japan in Japan
The prediction tool of acoustic property is applied for calculating the effects of the sound package on acoustic cavities damping. Predicted TL of trimmed components is compared to measurement results. This method is based on the transfer matrix approach and allow calculating, outside the SEA software, the needed quantities for multi-layered insulation components, by taking into account also the non-uniformity of the insulation part and the structure. This feature is crucial, in all cases, in which SEA models are used to design and optimize the vehicle acoustic package.