东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (8): 1143-1148.DOI: 10.12068/j.issn.1005-3026.2018.08.016

• 机械工程 • 上一篇    下一篇

考虑机匣柔性的新型旋转叶片-机匣碰摩模型

李炳强1， 马辉1， 郝玉明2， 谢方涛1   

  1. (1. 东北大学 机械工程与自动化学院， 辽宁 沈阳110819; 2. 沈阳鼓风机集团股份有限公司， 辽宁 沈阳110869)
  • 收稿日期:2017-04-05 修回日期:2017-04-05 出版日期:2018-08-15 发布日期:2018-09-12
  • 通讯作者: 李炳强
  • 作者简介:李炳强(1986-)，男，辽宁沈阳人，东北大学博士研究生; 马辉(1978-)，男，河北安平人，东北大学教授.冯明杰(1971-)， 男， 河南禹州人， 东北大学副教授; 王恩刚(1962-)， 男， 辽宁沈阳人， 东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金委员会与中国民用航空局联合资助项目(U1433109)； 中央高校基本科研业务费专项资金资助项目(N150305001，N160313004).国家自然科学基金资助项目(51171041).

A New Rotating Blade-Casing Rubbing Model Considering Flexibility of Casing

LI Bing-qiang1， MA Hui1， HAO Yu-ming2， XIE Fang-tao1   

  1. 1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2. Shenyang Blower Works Group Corporation， Shenyang 110869， China.
  • Received:2017-04-05 Revised:2017-04-05 Online:2018-08-15 Published:2018-09-12
  • Contact: MA Hui
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摘要： 针对旋转叶片与机匣的碰摩故障，以弹性叶片和柔性机匣作为研究对象，基于弹性协调相容条件推导新的旋转叶片与柔性机匣碰摩力模型.基于材料力学理论，考虑叶片旋转效应，如离心刚化和旋转软化，以及碰摩软化的影响，计算了叶片的准静态弯曲变形.采用带有弹簧支承的柔性环来模拟机匣，其位移由整体位移和局部柔性位移组成.根据能量守恒原理，建立柔性环的位移方程，并对其进行离散处理，得到机匣的结构刚度，进而求得机匣局部柔性位移.与文献和实验结果的对比验证了本文碰摩模型的准确性.

关键词: 旋转叶片, 柔性机匣, 等效刚度, 碰摩, 碰摩力模型

Abstract: Aiming at rubbing fault between rotating blade and casing， and taking elastic blade and flexible casing as studying objects， a new rotating blade-casing rub impact model was deduced based on elastic compatibility condition. Then considering centrifugal stiffening， rotating softening and rubbing softening， the quasi-static bending displacement of blade was calculated based on relevant theory of material mechanics. The casing was simulated as an elastic ring with spring support， and the displacement was composed of rigid-body and local-flexible displacements. The displacement equation of the flexible ring was established according to the principle of energy conservation， and the structural stiffness followed by local flexible displacement of the casing was obtained by discrete processing. Because of more parameters considered， the model has a good generality. Compared with the experimental data and the literature， the model can meet the requirements of calculation with a higher accuracy.

Key words: rotating blade, flexible casing, equivalent stiffness, rub-impact, rubbing model

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