Boundary characterization of rub-impact response of a helicopter supercritical transmission shaft with a dry friction damper

被引:0
|
作者
Jin S. [1 ]
Song L.-Y. [1 ]
Cao P. [2 ]
Li J. [2 ]
You Y.-P. [1 ]
Zhu R.-P. [1 ]
Wang D. [1 ]
机构
[1] National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] National Key Laboratory of Science and Technology on Helicopter Transmission, AECC Hunan Aviation Powerplant Research Institute, Zhuzhou
关键词
dry friction damper; response characteristics; rub-impact; stability analysis; supercritical transmission shaft;
D O I
10.16385/j.cnki.issn.1004-4523.2024.05.004
中图分类号
学科分类号
摘要
In pursuit of the ideal power-to-weight ratio,supercritical transmission shaft systems are increasingly used in the design of helicopter structures,which leads to the generation of violent vibrations driving through its critical speed. To suppress the excessive transcritical vibration,dry friction dampers are usually employed. In this study,a supercritical transmission shaft system with a dry friction damper is investigated. The governing equations are established and the boundary characteristics of various rub-impact responses of the system under eccentric excitation of the transmission shaft are analyzed. Firstly,the nonlinear governing equations of the damper/shaft system are constructed. Secondly,typical response characteristics are determined using frequency sweep,and the boundaries of impact occurrence and stability conditions for the synchronous full annular rub are solved using analytical methods. Finally,the derived response boundaries are verified by the Runge-Kutta method,and the relationship between the response boundaries and the system parameters is further explored. © 2024 Nanjing University of Aeronautics an Astronautics. All rights reserved.
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页码:756 / 769
页数:13
相关论文
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