Acoustic Design Tool for Structural Sandwich Panels

结构夹层板的声学设计工具

• 批准号: 508363-2017
• 负责人: Ruiz, Eduardo
• 金额: $ 0.91万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Engage Plus Grants Program
• 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=639513
• 关键词: Acoustic; Design; Tool; Structural; Sandwich

The Laboratory for Acoustics and Vibration Analysis (LAVA), at École Polytechnique de Montréal, andComtek, a Canadian company based in Burlington, are combining their expertise to develop new solutions forsound attenuation in sandwich floor panels used in regional and business jets. Composite floor panels are madeof lightweight core sandwiched between two thin skins having high tensile stiffness. Such design leads to lightstructures with exceptional flexural properties. However, the lightness of the panels facilitate the propagationof the acoustic and mechanical vibration causing passenger discomfort, and failure of electronic systems.Sound attenuation in such sandwich structures can be achieved through modification of the constructionparameters such as thickness, density of the core and/or the skin. Moreover a good scientific understanding ofthe sound attenuation mechanism is needed to correlate experimental measurements.In this collaborative project, an analytical model will be created to predict the acoustic properties of compositesandwich panels. The main purpose is to investigate and understand the relationship between the physicalparameters of the panels and the sound transmission loss (STL). Thus, a range of parameters known to improveacoustic properties such as the core shear modulus and the density of the core will be used as inputs to themodel. Experimental data collected from a previous Engage project will be used to validate the model. Such acombined approach will provide Comtek with valuable design tool to develop custom made floor panels withenhanced acoustic properties for the aeronautic industry.

典型理工学院的声学和振动分析实验室（LAVA），位于蒙特利尔的ÉcolePolytechnique deMontréal和位于伯灵顿的加拿大公司Comtek正在结合其专业知识，以开发新的解决方案，以在区域和商业码头中使用的三明治地板板中有效衰减。复合地板面板由轻巧的核心制成，这些芯夹在两个具有高拉伸刚度的薄皮之间。这样的设计导致具有特殊挠性特性的照明结构。然而，支持声学和机械振动的传播的面板的轻度导致乘客不适，以及电子系统的失败。可以通过修改构造参数（例如构造参数，例如厚度，核心的密度，核心和/或皮肤）来实现此类夹心结构中的衰减。此外，需要对合理的衰减机制进行良好的科学理解以关联实验测量。在此协作项目中，将创建一个分析模型来预测Copsitesandwich面板的声学特性。主要目的是研究和了解面板的物理参数与声音传输损失（STL）之间的关系。这是一系列已知可改善诸如核心剪切模量和核心密度的参数，将用作模型的输入。从先前的参与项目中收集的实验数据将用于验证模型。这种结合方法将为COMTEK提供有价值的设计工具，以开发为航空行业提供自我的声学特性的定制地板。