...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Techniques >Effects of Rub-Impact on Vibration Response of a Dual-Rotor System-Theoretical and Experimental Investigation
【24h】

Effects of Rub-Impact on Vibration Response of a Dual-Rotor System-Theoretical and Experimental Investigation

机译：摩擦对双转子系统的振动响应的影响 - 理论与实验研究

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to understand the mechanism of fixed-point rub-impact in aero-engine, a dual-rotor system with inter-shaft bearing able to describe the mechanical vibration caused by unbalance and fixed-point rub-impact is developed in this paper. Firstly, a finite element (FE) model of the dual-rotor based on Timoshenko beam element and disk element is proposed, in which the effects of gyroscopic moments, rotary inertias, bending and shear deformations are taken into account. A rub-impact model is developed to derive the rubbing force between the rotor and fixed limiter, in which the softening characteristics of coating painted in casing is fully taken into account. Moreover, the Coulomb model is applied to describe the frictional behaviors. Secondly, the governing equations to describe the motion of the dual-rotor system with rub-impact are solved numerically by the Runge-Kutta method, and the dynamic characteristics are investigated by 3D water-fall plots and frequency spectrum. Combined harmonic frequency, whirling frequency and rotational frequency components of dual rotors are observed. Finally, the experiments of fixed-point rub-impact are performed on a dual-rotor test bench. Good agreement between the theoretical and experimental results shows the accuracy of the dual-rotor FE model and rub-impact model. The results indicate that (1) first backward whirling and forward whirling are excited under the influence of unbalance force; (2) several combination frequency components and second backward whirling and forward whirling frequency components are presented under fixed-point rubbing condition.
机译：为了了解航空发动机的定点摩擦冲击机制，本文开发了一种能够描述由不平衡和定点摩擦冲击引起的机械振动的双转子系统。首先，提出了基于Timoshko梁元件和盘元件的双转子的有限元（Fe）模型，其中考虑了陀螺仪矩，旋转惯性，弯曲和剪切变形的影响。开发了一种摩擦冲击模型以导出转子和固定限制器之间的摩擦力，其中壳体涂漆的涂层的软化特性被完全考虑。此外，应用库仑模型来描述摩擦行为。其次，通过径格 - 库法测定用于描述双转子系统与擦伤的双转子系统的运动的运动方程，并通过3D水落图和频谱来研究动态特性。组合谐波频率，观察到双转子的旋转频率和旋转频率分量。最后，在双转子测试台上进行固定点摩擦的实验。理论和实验结果之间的良好一致性显示了双转子Fe模型和摩擦冲击模型的准确性。结果表明（1）在不平衡力的影响下，首先向后旋转和前向旋转令人兴奋; （2）在定点摩擦条件下呈现了几个组合频率分量和第二向后旋转和前旋转频率分量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号