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.

位于蒙特利尔理工学院的声学和振动分析实验室（LAVA）和位于伯灵顿的加拿大公司Comtek正在结合他们的专业知识，开发用于区域和商务喷气机的夹层地板声音衰减的新解决方案。复合地板是由夹在两层具有高抗拉刚度的薄蒙皮之间的轻质芯材制成的。这样的设计导致具有特殊弯曲性能的轻质结构。然而，面板的轻质便于声和机械振动的传播，从而引起乘客的不适和电子系统的故障。在这种夹层结构中的声音衰减可以通过修改诸如芯和/或表皮的厚度、密度的构造参数来实现。此外，还需要对声衰减机理有一个很好的科学理解，以关联实验测量结果。在这个合作项目中，将建立一个分析模型来预测复合夹层板的声学特性。主要目的是研究和了解板的物理参数与传声损失（STL）之间的关系。因此，一系列已知的参数，以改善声学性能，如核心剪切模量和核心的密度将被用作输入到themodel。从以前的Engage项目收集的实验数据将用于验证模型。这种组合方法将为Comtek提供有价值的设计工具，以开发具有增强声学性能的航空工业定制地板。