Quiet vehicle and power units are required to reduce noise pollution in the urban environment and to fulfil the rising comfort demands. In todays development process of new cars, engineers employ numerical simulation as a powerful tool for convincing predictions. Nevertheless, an effective benefit for the vehicle development process can only be gained if these methodologies are applied starting tram the early concept phase. The aims are an optimum concept design of the acoustic package with reference to the main criteria of cast, weight and acoustic comfort, as well as an accurate monitoring of the delivered quantities from component suppliers. Therefore, the enhancement in precision and efficiency of the NVH simulation for the early development of new vehicles is an ongoing This fact motivates for progress in simulation technologies to push existing limitations. The paper describes actual challenges for different simulation methodologies applied in the development of power trains and vehicles. On one hand, advanced techniques in the application of weil introduced methods are shown. Herein, actual requirements for interior noise calculation by means of the Finite Element Method (FEM) and Statistical Energy Analysis (SEA) are discussed. On the other hand, new predictive methods for specific applications are described, e.g. for the NVH assessment of new IC engine design and for the prediction of interior noise of vehicles in the mid frequency range. The specific requirements for different simulation methods are discussed and application examples are shown. New solutions are outlined in order to resolve limits in frequency range, to enhance the precision of the results and to introduce advanced methodologies for early product appraisal.
Challenges in power train and vehicle NVH simulation
Herausforderungen bei der Antriebsstrang- und NVH-Simulation bei Kraftfahrzeugen
2005
16 Seiten, 17 Bilder, 15 Quellen
Aufsatz (Konferenz)
Englisch
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