It is well known that involving NVH techniques and tools in the early phases of the development process can improve NVH behavior as well as reduce development time and costs. As engine and vehicle program timing continues to be reduced, development tasks for various components are run in parallel and as varying combinations of CAE and experimental analysis. The synthesis of interior noise from all these different results turns out to be a difficult task. In order to support this task a new approach has been developed that enables engineers to estimate interior noise in the very early phases of the development process. The Operational Noise Estimator (ONE) is a tool that provides audible prediction of interior noise from simulation, measurement data or a combination of both. By using this tool, the NVH effect of design modifications at the engine, intake / exhaust system, firewall isolation and the associated transfer paths becomes audible. This enables cascading of necessary targets from the desired interior noise target down to the component level. Prediction quality is largely determined by the quality of the input data. Reasonable predictions are achieved in the early stages of the development process in which only simulation data is available. Subsequently, optimization of interior noise by simulation loops of individual noise sources can be performed. As soon as prototype hardware is available, prediction accuracy can be enhanced. This paper describes this noise prediction approach in detail and demonstrates possible applications.
Interior Sound Prediction Assisting the NVH Development Process
2013
11 Seiten, Bilder, 3 Quellen
Conference paper
English
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