航空学报 > 2013, Vol. 34 Issue (6): 1301-1308   doi: 10.7527/S1000-6893.2013.0071

弹性环金属橡胶支承结构刚度设计与试验验证

马艳红, 陆宏伟, 朱海雄, 洪杰   

  1. 北京航空航天大学能源与动力工程学院, 北京 100191
  • 收稿日期:2012-07-24 修回日期:2013-01-14 出版日期:2013-06-25 发布日期:2013-02-01
  • 通讯作者: 马艳红, Tel.: 010-82319012 E-mail: mayanh2002@163.com E-mail:mayanh2002@163.com
  • 作者简介:马艳红 女, 博士, 副教授。主要研究方向: 航空发动机结构动力学, 金属橡胶材料性能, 金属橡胶结构设计及其应用。 Tel: 010-82319012 E-mail: manyanh2002@163.com
  • 基金资助:

    国家自然科学基金(51101008);国家自然科学基金-中英合作交流项目(51211130115)

Structural Stiffness Design and Experimental Evaluation of Elastic Ring-metal Rubber Damper

MA Yanhong, LU Hongwei, ZHU Haixiong, HONG Jie   

  1. School of Jet Propulsion, Beihang University, Beijing 100191, China
  • Received:2012-07-24 Revised:2013-01-14 Online:2013-06-25 Published:2013-02-01
  • Contact: 10.7527/S1000-6893.2013.0071 E-mail:mayanh2002@163.com
  • Supported by:

    National Natural Science Foundation of China (51101008); National Natural Science Foundation of China-Sino-British Cooperation Project (51211130115)

摘要:

弹性环金属橡胶阻尼器(MRD/ER)是本文提出的一种有别于传统挤压油膜阻尼器的新型无油润滑转子弹性支承阻尼结构,其支承刚度主要来源于弹性环和金属橡胶,并利用金属橡胶阻尼元件提供结构阻尼。该结构具有良好的线性支承刚度且对转子振动阻尼减振效果明显,其限幅凸台限制转子系统可能出现的过大振幅,保证系统安全可靠。本文对该种弹性阻尼支承结构进行结构和动力学设计,并通过刚度阻尼性能仿真计算以及相应的试验进行验证,结果表明:在准静态试验中,阻尼器的组合刚度在大变形范围内具有良好的线性特征且具有稳定的阻尼性能;在动态试验中,结构动刚度随激振频率的增加而减小,在宽频域内具有较大的阻尼系数。

关键词: 弹性环, 金属橡胶, 结构设计, 振动控制, 动刚度

Abstract:

The elastic ring-metal rubber damper (MRD/ER) presented in this paper is a new type of oil-free rotor support structure different from the traditional squeeze film damper and proposed according to the vibration control in design criteria. The elastic ring provides its essential stiffness, the metal rubber provides part of the stiffness, and the metal rubber damping elements provide the main support damping. Both the elastic support and damping properties are achieved, making possible the optimal design of the critical speed and the vibration control of the rotor system. The linear supporting stiffness of the elastic ring-metal rubber damper is better than the traditional squeeze film damper, and it can effectively inhibit rotor vibration. Large amplitudes can be prevented by the amplitude limit convex platform to ensure system safety and reliability. An investigation on the structural design, a simulation analysis and mechanical experiments are conducted in this study. The quasi-static tests suggest that the stiffness of the damper is within the design scope and the damping property is good. The dynamic tests suggest that the dynamic stiffness and damping coefficients decrease with the increase of the excitation frequency. On a wide frequency range, the elastic ring-metal rubber possesses large damping coefficient.

Key words: elastic ring, metal rubber, structural design, vibration control, dynamic stiffness

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