The vehicle development process is under continuous pressure to reduce the time and cast to come up with innovative designs while customer demands and legislation keep pushing the required performance envelopes. This demands frontloading the design optimization of functional performances such as noise, comfort, durability and safety to the earliest possible stages of the design cycle, which can only be realized through the extensive use of virtual prototypes. The applicable methodologies to realize such a virtual design optimization approach are reviewed and critical issues such as the correct load definition and simulation performance requirements are discussed. Specific attention is devoted to the potential of hybrid methods combining virtual models with experimental data. The discussed methods are illustrated by means of powertrain noise and vibrations case studies. Virtual Prototyping for engine and powertrain development has evolved to a stage where application as part of a standard industrial design engineering process is feasible. Success factors to achieve this are more than the (very significant) advances made on the level of computing power, fast solvers and application-specific models for components, materials and connections. Essential is the seamless integration of the various modelling and calculation steps in the complete design process in a design-centric way, allowing fast redesign and opening the way to formal optimization procedures. This includes the important advances on meshing, from CAD to CAE, from structural meshes to acoustic meshes. But it also relies on the full support of the complete process on a transparent platform.
Vibro-acoustic design engineering using virtual and hybrid models
Vibroakustisches Entwurfsverfahren mit virtuellen und hybriden Modellen
2003
14 Seiten, 22 Bilder, 19 Quellen
Conference paper
English
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