东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (7): 1017-1020+1029.DOI: -

• 论著 • 上一篇    下一篇

气动力作用下旋转叶片的动力特性研究

谭祯;李朝峰;张鹏;闻邦椿;   

  1. 东北大学机械工程与自动化学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家科技支撑计划项目(2009BAG12A01-F01-3);;

Research on dynamic characteristics of rotating blades under aerodynamic forces

Tan, Zhen (1); Li, Chao-Feng (1); Zhang, Peng (1); Wen, Bang-Chun (1)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Tan, Z.
  • About author:-
  • Supported by:
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摘要： 气固耦合振动是叶片振动的影响因素之一,为了了解旋转机械中叶片在气流作用下的动力特性,使用CFX和ANSYS分别求解流场和结构响应.探讨了叶片在气流激励下的耦合计算方法,将旋转叶片与气流作为一个系统进行气流场与固体弹性结构的瞬态动态响应计算.建立了一个旋转叶片流道模型,对气流场进行全场三维非定常瞬态求解,将非定常气动载荷引入旋转叶片有限元结构计算中,得到叶片在不同转速下的强迫响应,并对其响应位移变化进行分析比较.结果显示在非定常条件下,叶片的不稳定范围位于固有频率附近.此研究为工程上对旋转叶片的动力响应预估和研究提供了一个可行的方法.

关键词: 旋转叶片, 非定常, 气动力, 气固耦合, 瞬态分析

Abstract: Air-structure coupling vibration is one of the influence factors of blades vibration. In order to study the dynamic characteristics of rotating blades under aerodynamic forces, the CFX and ANSYS were used to calculate the responses of flow field and structure, respectively. The coupling calculation method of blades under air excitation was discussed, and the transient dynamic response of the solid flexible structure was calculated with the blades and air as one system. A rotating blade flow channel model was established to compute the 3D unsteady transient in air flow channel, and the forced responses of blade in different rotate speeds were calculated by importing the transient pneumatic load to the finite element structural computation. The results showed that the blade instability range was near the natural frequency under the unsteady condition. Thus, a feasible method was provided for the estimation and study of the dynamic responses of rotating blades in engineering.

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