东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (1): 61-67.DOI: 10.12068/j.issn.1005-3026.2025.20230219

• 机械工程 • 上一篇    下一篇

考虑关节间隙的可调矢量喷管动力学特性

罗忠1,2,3, 赵江1,2, 许春阳4, 曹航4   

  1. 1.东北大学 机械工程与自动化学院,辽宁 沈阳 110819
    2.东北大学 航空动力装备振动及控制教育部重点实验室,辽宁 沈阳 110819
    3.东北大学 佛山研究生创新学院,广东 佛山 528312
    4.中国航发沈阳发动机研究所,辽宁 沈阳 110015
  • 收稿日期:2023-07-25 出版日期:2025-01-15 发布日期:2025-03-25
  • 作者简介:罗 忠(1978—),男,内蒙古集宁人,东北大学教授,博士生导师.
  • 基金资助:
    国家科技重大专项(J2019-IV-0002-0069);国家自然科学基金资助项目(12272089);广东省基础与应用基础研究联合基金资助项目(2020B1515120015);中央高校基本科研业务费专项资金资助项目(N2224001-4)

Dynamic Characteristics of Adjustable Vector Nozzles Considering Joint Clearance

Zhong LUO1,2,3, Jiang ZHAO1,2, Chun-yang XU4, Hang CAO4   

  1. 1.School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China
    2.Key Laboratory of Vibration and Control of Aero-Propulsion System,Ministry of Education,Northeastern University,Shenyang 110819,China
    3.School of Foshan Graduate Innovation,Northeastern University,Foshan 528312,China
    4.AECC Shenyang Engine Research Institute,Shenyang 110015,China. Corresponding author: LUO Zhong,E-mail: zhluo@mail. neu. edu. cn
  • Received:2023-07-25 Online:2025-01-15 Published:2025-03-25

摘要:

针对航空发动机可调矢量喷管机构运动稳定性差的问题,开展了间隙对其动力学特性影响的研究.首先,采用第一类Lagrange方程建立可调矢量喷管单链机构动力学模型,得到单链机构驱动力变化曲线.然后采用Lankarani-Nikravesh接触力模型和修正的Coulomb摩擦模型建立运动副间隙模型,并利用函数在动力学仿真软件中构建间隙模型.最后基于虚拟样机技术建立含关节间隙的单链机构动力学模型,仿真分析了间隙位置、间隙尺寸对可调矢量喷管机构动力学特性的影响.结果表明,间隙与气动力的力臂越大,系统动力学特性波动越显著,小间隙范围内关节间隙尺寸增大时,可调矢量喷管机构动力学特性的波动幅值先减小后增大,当三角拉杆与转向控制环之间的间隙为0.3 mm时,系统动力学最稳定.

关键词: 航空发动机, 可调矢量喷管, 动力学建模, 关节间隙, 动力学特性

Abstract:

Aiming at the problem of poor kinematic stability of the adjustable vector nozzle mechanism used in the aero‑engine system, the effect of clearance on its dynamic characteristics was studied. Firstly, the dynamic model of the adjustable vector nozzle single‑chain mechanism was established using the first type of Lagrange equation, and the driving force variation curve of the single‑chain mechanism was obtained. Then, the contact force model proposed by Lankarani and Nikravesh and the modified Coulomb friction model were used to establish the moving pair clearance model, which was constructed in the dynamic simulation software by using the function. Finally, a dynamic model of the single‑chain mechanism with joint clearance was established based on the virtual prototyping technology. The effects of clearance position and clearance size on the dynamic characteristics of the adjustable vectoring nozzle mechanism were simulated and analyzed. The results showed that the larger the clearance and aerodynamic force arm, the more significant the fluctuation of the system dynamics characteristics. As the joint clearance size increases within the small clearance range, the fluctuation amplitude of the dynamic characteristics of the adjustable vector nozzle mechanism decreases first and then increases. When the clearance between the triangular rod and the steering control ring is 0.3 mm, the system dynamics become the most stable.

Key words: aircraft engine, adjustable vector nozzle, dynamic modeling, joint clearance, dynamic characteristics

中图分类号: