Computational vibro-acoustic modeling for aircraft fuselage design optimization

用于飞机机身设计优化的计算振动声学建模

• 批准号: 453375-2013
• 负责人: Mechefske, Chris
• 金额: $ 2.4万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=659460
• 关键词: Computational; vibro; acoustic; modeling; aircraft

In order to remain commercially competitive and limit the environmental impact of their activities**(manufacturing and use of aircraft), Bombardier Aerospace continually searches for optimum aircraft design**and manufacturing methods. The focus of this project is on ways to reduce the acoustic noise transmitted**through the fuselage from the exterior to the interior of the aircraft while minimizing the addition of acoustic**barrier material and eliminating costly and environmentally unfriendly manufacturing methods.**The proposed project has two main objectives. The first objective is to develop and experimentally verify**accurate computational (FEM and BEM) vibro-acoustic models of various aircraft fuselage designs. These**models will then allow Bombardier to predict the acoustic transmission loss (acoustic noise attenuation)**through different aircraft fuselage designs without the need for expensive iterative experimental measurements.**The second objective is to use the newly developed computational modeling tool to search for optimum**fuselage designs. This objective has two principal tasks. The first task is to find the design that provides the**highest acoustic noise attenuation with the lowest weight per unit area. The second task will be to evaluate**alternative manufacturing methods that could be used with the optimum fuselage design to reduce overall**combined costs (including fuel consumption (due to net weight), manufacturing costs (due to materials used**and fabrication time), and inspection costs (to meet regulatory requirements). The multi-parameter optimization**will likely require revisiting the original "optimal" design (for reduced noise) and making modifications that**will affect factors related to manufacturing and operating costs. The computational model that predicts**vibro-acoustic noise transmission will allow this iterative process to be completed without the need for**prototype testing until the final stage, therefore saving considerable time and money.

为了保持商业竞争力并限制其活动 **（飞机制造和使用）对环境的影响，庞巴迪宇航公司不断寻求最佳的飞机设计 ** 和制造方法。该项目的重点是如何减少从飞机外部到内部通过机身传播的噪音，同时尽量减少隔音材料的添加，并消除昂贵和环境不友好的制造方法。拟议的项目有两个主要目标。第一个目标是开发和实验验证各种飞机机身设计的精确计算（FEM和BEM）振动声学模型。这些 ** 模型将使庞巴迪能够通过不同的飞机机身设计预测声传输损失（声噪声衰减）**，而无需昂贵的迭代实验测量。**第二个目标是使用新开发的计算建模工具来寻找最佳的机身设计。这一目标有两项主要任务。第一个任务是找到设计，提供最高的声学噪声衰减与最低的重量每单位面积。第二项任务是评估可用于最佳机身设计的替代制造方法，以降低总体综合成本（包括燃料消耗（由于净重），制造成本（由于使用的材料 ** 和制造时间）和检查成本（以满足法规要求））。多参数优化 ** 可能需要重新审视最初的“最佳”设计（以降低噪音），并进行修改，** 将影响与制造和运营成本相关的因素。预测 ** 振动-声学噪声传输的计算模型将允许完成此迭代过程，而无需在最后阶段进行 ** 原型测试，因此节省了大量时间和金钱。