Meta-composites for noise and vibration control

用于噪声和振动控制的超复合材料

• 批准号: RGPIN-2015-05327
• 负责人: Atalla, Noureddine
• 金额: $ 3.13万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638538
• 关键词: Meta; composites; noise; vibration; control

The proposed research program is aimed at developing novel and lightweight meta-composite  sound packages designed for sound and vibration applications. The specific application of interest consists of modern lightweight constructions with attached noise control treatments. The targeted meta-composites combine the natural properties of the used structures (stiffness, lightweight…) and attached sound packages (e.g. passive absorption of open cell foams) with resonant and active inclusions suitably located and controlled to ensure maximum structural, vibration and acoustic performance over the entire audible frequency range and at low frequency in particular. This represents the major and current challenge in sound insulation since in this frequency range conventional treatments are practically inefficient. Using state of the art numerical and experimental tools, the methodology includes (i) designing new absorptive materials with augmented performances using a combination of adaptive and passive means; (ii) developing refined and robust analytical and computational models for these meta-composites combined with their fine experimental validations; (iii) fabricating reduced scale prototypes and using industry representative experimental tests to prove their practical performance and (iv) quantification of the variability and robustness of the developed prototypes. The outcome of this research is both fundamental knowledge (refined analytical and numerical models elucidating the used physics and guiding the design) and technology (characterization and design tools, fully functional prototypes). These developments are generic and applicable to noise and vibration control problems in the transport, aerospace and construction sectors. Moreover, several highly qualified people will be trained through this program; they will be able to support these industries and Canadian research institutions.

拟议的研究计划旨在开发专为声音和振动应用设计的新型轻质元复合声音包。感兴趣的具体应用包括现代轻质结构和附加的噪音控制处理。目标超复合材料联合收割机将所用结构的自然特性（刚度、重量轻.）和所附的声音包（例如开孔泡沫的被动吸收）与适当定位和控制的共振和主动内含物相结合，以确保在整个可听频率范围内，特别是在低频下的最大结构、振动和声学性能。这代表了隔音方面的主要和当前挑战，因为在该频率范围内，常规处理实际上是低效的。利用最先进的数值和实验工具，该方法包括：（i）设计新的吸收材料，使用自适应和被动手段的组合增强性能;（ii）开发这些超复合材料的精细和鲁棒的分析和计算模型，结合其精细的实验验证;（iii）制造缩小比例的原型，并使用具有行业代表性的实验测试来证明其实际性能，以及（iv）量化所开发原型的可变性和稳健性。这项研究的成果是基础知识（精细的分析和数值模型，阐明所使用的物理和指导设计）和技术（表征和设计工具，功能齐全的原型）。这些发展是通用的，适用于运输，航空航天和建筑部门的噪声和振动控制问题。此外，一些高素质的人将通过该计划进行培训，他们将能够支持这些行业和加拿大的研究机构。