Transmission of Vibration Loads between Interacting Shafts

相互作用轴之间振动载荷的传递

• 批准号: 1790892
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1790892
• 关键词: Transmission; Vibration; Loads; between; Interacting

This project aims to investigate how vibrations are transmitted between different shafts in a jet engine, known as cross-shaft coupling. Most modern jet engines have split compressors each driven by its own turbine, with the speed of rotation increasing at each stage for improved aerodynamic efficiency. This allows for a more compact design for the same thrust. However, current modelling techniques do not accurately predict the transmission of vibrations from one rotor to another, due to the complex interaction of shafts, rolling-element bearings (REB) and squeeze film dampers (SFD). Previous work has concentrated on developing models of the individual components and this has not been straight forward, so incorporating them into a system level model is expected be extremely challenging, because there could be sub-harmonic, instabilities or even chaotic motion. Validation of the model will be performed against a test rig which will be developed in a parallel activity. The ultimate aim is to deliver fully validated lightweight models of the relevant components, and to provide insight into the mechanisms involved in these phenomena .

这个项目旨在研究振动是如何在喷气发动机的不同轴之间传递的，即所谓的交叉轴耦合。大多数现代喷气发动机都有分裂的压气机，每个压气机由自己的涡轮驱动，每一级的旋转速度都在增加，以提高空气动力学效率。这允许一个更紧凑的设计相同的推力。然而，由于轴、滚动轴承（REB）和挤压膜阻尼器（SFD）之间复杂的相互作用，目前的建模技术并不能准确地预测振动从一个转子到另一个转子的传递。以前的工作集中在开发单个组件的模型上，这并不是直截了当的，因此将它们纳入系统级模型预计是极具挑战性的，因为可能存在次谐波、不稳定甚至混沌运动。该模型的验证将在一个平行活动中开发的试验台上进行。最终的目标是交付相关组件的经过充分验证的轻量级模型，并提供对这些现象中涉及的机制的洞察。

项目成果

Experimental investigation of non-linear stiffness behaviour of a rolling-element bearing

滚动轴承非线性刚度行为的实验研究

• 发表时间: 2020
• 作者: A. Haslam

Asynchronous Rotor Excitation System (ARES) - A new rotor dynamic test facility at Imperial College London

异步转子励磁系统 (ARES) - 伦敦帝国理工学院的新转子动态测试设施

• 发表时间: 2020
• 作者: C.W. Schwingshackl

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

• DOI: 10.1007/s11071-020-05470-4
• 发表时间: 2020-01-22
• 期刊: NONLINEAR DYNAMICS
• 影响因子: 5.6
• 作者: Haslam, Alexander H.;Schwingshackl, Christoph W.;Rix, Andrew I. J.
• 通讯作者: Rix, Andrew I. J.