Résumé des résultats (Abstract)
(Anglais)
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Up to day, many intelligent materials systems such as fibre composites with embedded piezo-ceramics or shape memory alloys are derived, characterised and applied in smart structures on a laboratory scale without penetrating the existing design rules for engineered structures or being applied in mass products. Although their potential could be demonstrated and realised to a certain extend in prototypical structures, intelligent material systems have still a insufficient performance, requires a unacceptable electronic periphery, a lack of data on their durability and reliability and, most important, can not be included in the standard design and manufacturing process. The objective of the proposed Integrated project 'Intelligent Materials for Active Noise Reduction (1nMAR)' is therefore the realization of intelligent, high performing adaptive material systems with integrated electronics able to be applied for noise attenuation purposes, even in highly loaded structures a construction material in the same manner as common passive or light weight materials are used. Aside from the pure development of the materials or material systems itself, this research also includes their characterization, simulation tools for the design process, handling and manufacturing techniques as well as their reliability. According to the common trend in engineering the development has to be performed on an experimental as well as on theoretical and numerical level.
Since the requirements for intelligent material systems, other than conventional lightweight materials, strongly depend on the intended applications the newly designed intelligent material systems are applied to active noise reduction concepts based on Active Structural Acoustic Control (ASAC) or Active Noise Control (ANC) for Sound Quality Design. Out of manifold applications, noise problems in land-based traffic and related infrastructure such as buildings, bridges and tunnels are chosen for demonstration.
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