Nonlinear dynamics of asymmetrically supported supercritical rotor equipped with a dry friction damper

被引:2
|
作者
Wang, Dan [1 ,3 ]
Song, Liyao [1 ]
Cao, Peng [2 ]
Zhu, Rupeng [1 ]
机构
[1] Nanjing Univ Aeronaut & Astronaut, Natl Key Lab Sci & Technol Helicopter Transmiss, Nanjing, Peoples R China
[2] AECC Hunan Aviat Powerplant Res Inst, Natl Key Lab Sci & Technol Helicopter Transmiss, Zhuzhou, Peoples R China
[3] Nanjing Univ Aeronaut & Astronaut, Natl Key Lab Sci & Technol Helicopter Transmiss, 29, Yudao St, Nanjing 210016, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Dry friction damper; supercritical rotor; rub impact; support asymmetry; skew-symmetric cross-coupling stiffness; VIBRATION RESPONSE CHARACTERISTICS; DUAL-ROTOR; SYSTEM; WHIRL;
D O I
10.1177/09544062221145517
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
To suppress the excessive transcritical vibration of a supercritical rotor, dry friction damper is a popular choice especially in rotorcraft and aero-engine design. In the current work, we focus on the nonlinear dynamics of asymmetrically supported supercritical rotor equipped with a dry friction damper and the influence of support asymmetry on damper's performance. Governing equations of the rotor/damper system, which fully consider the nonlinear rub-impact and side dry friction effects, are derived. Typical results of symmetrically supported rotor/damper systems are firstly demonstrated and quantitatively compared with experimental counterparts to confirm the predicting capability of the nonlinear dry friction damper model. Afterward, influences of asymmetric direct stiffness and skew-symmetric cross-coupling stiffness are discussed. It is found that direct stiffness asymmetry deteriorates the transcritical vibration attenuation capability of the damper but reduces the width of transcritical region. For system with a severer direct stiffness asymmetry, a larger pre-tightening force is suggested to be imposed. Besides, unstable self-excited vibration induced by skew-symmetric cross-coupling stiffness is found to be well-limited by the dry friction damper within entire interested rotational speed range. Moreover, during critical speed transition, the self-excited frequency component is completely suppressed.
引用
收藏
页码:2954 / 2968
页数:15
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