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 (12): 1758-1761+1799.DOI: -

• 论著 • 上一篇    下一篇

脉冲力加载下的叶片-机匣动力学特性研究

太兴宇;马辉;谭祯;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 blade-casing with impulse loading

Tai, Xing-Yu (1); Ma, Hui (1); Tan, Zhen (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: Tai, X.-Y.
  • About author:-
  • Supported by:
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摘要： 针对叶片与机匣碰摩故障,将叶片简化为悬臂梁,采用Timoshenko梁单元建立了叶片在脉冲力加载下的动力学方程,同时考虑了柯氏力与离心力的影响.对不同转速下的叶片的动力学特性进行数值仿真.通过分析发现,在低转速时,叶尖位移的振动与脉冲力加载同步,并且在力消失后,叶片处于高频振动;而在高转速时,叶尖振动会由于惯性等原因,与力的加载不同步,表现出非线性特征,而自由振动时间较短,很快便进入下一周期,叶片处于低频振动.并且发现,由于离心刚化的作用,使得高转速时叶片的位移要小于低转速时的位移.

关键词: 叶片-机匣, 碰摩, 动力学特性, 数值仿真, 离心刚化

Abstract: The dynamical equation of blade with impulse loading was established based on the Timoshenko beam element with considering the effect of Coriolis and centrifugal forces. The dynamic characteristics of the blade at different rotating speeds were analyzed. The results show that synchronization is produced between blade displacement and impulse loading under low speed, and the blade is in high-frequency vibration when the force is removed. Non-synchronization is observed under high engine speed because of inertia and the blade is in low-frequency due to the shorter vibration. Moreover, the displacement of blade in high speed is less than that in low speed for the effect of centrifugal rigidization.

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