Identification of physical parameters influencing the acoustic properties of composite sandwich panels

影响复合夹芯板声学性能的物理参数识别

• 批准号: 492192-2015
• 负责人: Ruiz, Eduardo
• 金额: $ 1.82万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=587202
• 关键词: Identification; physical; parameters; influencing; acoustic

Comtek Advanced Structures, a Canadian company based in Burlington, Ontario, has developed through the years an expertise in composite manufacturing. Comtek is now tackling the problem of sound attenuation in composite sandwich floor panels used in commercial, regional, and business aircrafts. Composite floor panels typically comprise a lightweight core material sandwiched between two thin skins. This architecture leads to light weight structures having excellent structural properties; however, the lightness of these panels eases the propagation of acoustic and mechanical vibration, causing passenger discomfort and damage of electronic system. Sound attenuation in such sandwich structures can be improved through modification of the construction parameters such as thickness, density, and mechanical properties of the core and/or skin. However, sound scientific understanding of the sound attenuation mechanisms is needed in order to develop engineering methods that would facilitate floor panel designs capable of achieving targeted acoustic performance. Polytechnique Montreal has an expertise in composite materials and has developed great knowledge in composite damping. Researchers at Polytechnique Montreal will work closely with Comtek to identify the physical parameters affecting the sound attenuation in composite floor panels. Materials and assembly of the sandwich panels will be studied to assess which parameters are most influential, such as damping material, thickness, density and stiffness of the constituents, the use of foam core, and the inclusion of perforated skins or septums. Based on the results of this project, Comtek will continue its collaboration with Polyetchnique Montreal to further develop an optimized panel configuration. Experimental data collected from this project will be used for analytical validation, and the lessons learned will guide future research efforts. Such a combined approach will provide Comtek with a valuable design tool that can be used to develop custom made aircraft floor panels having targeted acoustic properties.

位于安大略伯灵顿的加拿大公司Comtek Advanced Structures通过 多年的复合材料制造专业知识。Comtek现在正在解决声音衰减的问题， 用于商业、区域和商务飞机的复合夹层地板。复合地板 通常包括夹在两个薄表层之间的轻质芯材料。这种架构导致 轻质结构具有优异的结构性能;然而，这些面板的轻质性使 传播声音和机械振动，导致乘客不适和电子设备损坏 系统这种夹层结构中的声音衰减可以通过修改 构造参数，例如芯和/或表层的厚度、密度和机械性能。 然而，需要对声音衰减机制有合理的科学理解， 工程方法，这将有助于地板镶板设计能够实现目标的声学 性能蒙特利尔理工大学在复合材料方面拥有专业知识，并已开发出巨大的 复合阻尼知识。蒙特利尔理工学院的研究人员将与Comtek密切合作， 确定影响复合地板中声音衰减的物理参数。材料和 将研究夹层板的组装，以评估哪些参数最具影响力，例如 阻尼材料、组成部分的厚度、密度和刚度、泡沫芯的使用以及 穿孔的皮肤或隔膜。基于该项目的成果，Comtek将继续与 Polyetchnique Montreal进一步开发优化的面板配置。实验数据收集自 该项目将用于分析验证，所吸取的经验教训将指导今后的研究工作。 这种组合方法将为Comtek提供一种有价值的设计工具，可用于开发定制的 制造具有目标声学特性的飞机地板镶板。