• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2024, Vol. 60 ›› Issue (5): 70-80.doi: 10.3901/JME.2024.05.070

• 机器人及机构学 • 上一篇    下一篇

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高速薄辐板齿轮传动节径型振动位移与动应变时空变换方法

魏静1, 刘指柔1, 魏海波2, 徐子扬1   

  1. 1. 重庆大学机械传动国家重点实验室 重庆 400044;
    2. 重庆大学航空航天学院 重庆 400044
  • 收稿日期:2023-03-01 修回日期:2023-09-25 出版日期:2024-03-05 发布日期:2024-05-30
  • 通讯作者: 魏静,男,1978年出生,博士,教授,博士研究生导师。主要研究方向为机电传动系统动力学与振动噪声控制。E-mail:weijing_slmt@163.com
  • 作者简介:刘指柔,女,1993年出生,博士研究生。主要研究方向为高速航空齿轮振动控制。E-mail:20200701023@cqu.edu.cn;魏海波,男,1989年出生,博士,助理研究员。主要研究方向为高速航空齿轮振动控制。E-mail:haibwei@163.com;徐子扬,男,1994年出生,博士研究生。主要研究方向为高速航空齿轮振动控制。E-mail:slmt_xuzy@cqu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(52275048)。

Time-space Transformation Method of Vibration Displacement and Dynamic Strain in Nodal-diameter Vibration of High-speed Thin-walled Gear

WEI Jing1, LIU Zhirou1, WEI Haibo2, XU Ziyang1   

  1. 1. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044;
    2. College of Aerospace Engineering, Chongqing University, Chongqing 400044
  • Received:2023-03-01 Revised:2023-09-25 Online:2024-03-05 Published:2024-05-30

摘要: 高速薄辐板齿轮传动功率密度高,在航空动力传动系统中应用广泛,但节径型共振模态密集、振动能量高,是高速薄辐板齿轮传动疲劳损坏的主要形式之一。节径型振动位移与试验动应变呈非正相关关系,振动响应与动应力之间缺少直接量化的纽带,为此,提出一种高速薄辐板齿轮节径型振动位移与动应变时空变换方法。综合考虑节径型振动下试验动应变与振动位移行波之间的空间向量关系,建立试验动应变与振动位移变换函数,并给出偏微分方程的时空离散解与动应变-振动位移变换方法;根据试验动应变时/频信号以及不同节径数下齿轮行波模态特性,获取振动位移时空离散解。理论与试验结果表明,某试验齿轮在3节径下出现明显行波共振,理论仿真的振动频率、转速与试验结果基本一致,验证了所提理论和方法的正确性与可行性。

关键词: 薄辐板齿轮, 节径振动, 振动位移, 动应变, 时空变换方法

Abstract: High-speed thin walled gear has high-power density and is widely used in aviation power transmission system. However, the node-diameter type resonance has dense resonant modes and high vibration energy, which is one of the main forms of fatigue damage of high-speed thin walled gear. Due to the non-positive correlation between dynamic strain and vibration displacement of nodal diameter vibration, there is no direct quantitative link between dynamic response and dynamic strain. Therefore, a time-space conversion method of node-diameter displacement and dynamic strain of high-speed thin walled gear is proposed. Considering the space vector relationship between the measured strain and the displacement traveling wave of the strain gauge, the conversion function of dynamic strain and vibration displacement is established, and the time-space discrete solution of the partial differential equation and the strain displacement conversion method are given. Then, based on the time-frequency signal of the test strain and the gear modal characteristics under different nodal diameters, the time-space discrete solution of the vibration displacement is obtained. Based on the comparison between the theoretical and experimental results, the test spur gear has obvious resonance at 3 nodal diameters. And the theoretical simulation vibration frequency and speed are basically consistent with the experimental results, which validates the feasibility of the proposed theory and method.

Key words: thin-walled gear, nodal diameter vibration, vibration displacement, dynamic strain, time-space transformation

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