Advanced technologies for aircraft engine vibration reduction

拟议研究的目标是开发先进的技术和工具来减少飞机发动机的振动。发动机诱发振动是飞机结构振动的主要来源，对座舱噪声有很大影响。随着化石燃料成本的上涨，航空业正在转向下一代飞机，这种飞机的机身更轻，空气动力学效率更高。在这些飞机的设计过程中必须考虑结构振动。类似的趋势也反映在飞机发动机市场上。本研究分三个主要阶段解决上述问题：模拟、实验以及设计指南和工具的开发。首先，将开发能够准确地考虑飞机发动机系统和部件的复杂几何、边界条件和非线性行为的数值和分析模型。然后将进行几个不同级别的实验，包括组件、钻机和发动机系统级别，以便于提供足够的数据来验证和校准组件和系统模型。这些充实的模型将被用来代表发动机系统在流体动力学和机械特性方面的多学科性质。它们还将被动态减少和微调/优化，以便它们在计算上高效，并可应用于实际工业环境中。然后，微调模型的预测将被用于在发动机设计周期中建立设计和分析指南。通过利用多伦多大学的现代结构动力设施和加拿大普惠公司的技术专长，该项目预计将产生丰富的先进技术和知识，以降低飞机发动机的振动。通过高保真模拟模型和工具改善发动机设计周期，显著提高了成功的创新设计和集成工程解决方案的潜力。因此，它将加强P&WC和加拿大航空工业在这个竞争激烈的行业中的技术优势。这项研究也将为高素质人才的培养提供一个独特的机会。

The objective of the proposed research is the development of advanced technologies and tools to reduce aircraft engine vibration. Engine-induced vibration is the main source of aircraft structural vibration, which contributes significantly to cabin noise. As the cost of fossil fuels rises, the industry is shifting to the next generation of aircraft, which feature lighter and more aerodynamically efficient airframes. Structural vibrations must be taken into account in the design processes of these aircraft. A similar trend is reflected in the aircraft engine market as well. This research addresses the above issue in three main phases: simulation, experiments, and the development of design guidelines and tools. First, numerical and analytical models, which can accurately account for the complex geometries, boundary conditions, and nonlinear behaviour of aircraft engine system and components, will be developed. Several different levels of experiments including component, rig, and engine system levels will then be carried out to facilitate enough data to validate and calibrate the component and system models. These substantiated models will be used to represent the multi-disciplinary nature of engine systems with regard to their fluid dynamic and mechanical characteristics. They will also be dynamically reduced and fine-tuned/optimized so that they are computationally efficient and can be applied in the practical industrial environment. The predictions of the fine-tuned models will then be employed to establish design and analysis guidelines in the engine design cycle. By utilizing the modern structural dynamic facilities at the University of Toronto combined with the technical expertise at Pratt & Whitney Canada, this project is expected to produce a wealth of advanced technology and knowledge for aircraft engine vibration reduction. The enhancement to the engine design cycle through high fidelity simulation models and tools significantly increases the potential of successful innovative designs and integrated engineering solutions. Thus it will strengthen the technological edge for P&WC and the Canadian aerospace industry in this competitive industry. This research will also provide a unique opportunity for the training of highly qualified personnel.