主动干摩擦阻尼器参数敏感性分析及控制策略设计

doi:10.3901/JME.2025.20.328

摘要/Abstract

摘要： 在由主动干摩擦阻尼器(Active dry friction dampers，ADFD)支承的转子系统中，ADFD摩擦阻尼水平的可控性使转子系统不平衡振动能够通过ADFD的正压力调节，通过量化指标分析ADFD对转子系统不平衡振动的影响有利于ADFD正压力控制策略的合理设计。针对这一问题，提出应用Morris方法量化转子系统的不平衡振动关于ADFD正压力变化的敏感程度，并通过研究不同轴向位置、不同转速、不同正压力范围条件下转子系统不平衡振动灵敏度的变化规律来进行系统振动控制目标及正压力控制算法的设计。数值分析及模拟试验结果均表明，通过选取灵敏度最大轴向位置处转子的不平衡振动作为控制目标就能够对转子系统特定模态的振动进行有效控制；灵敏度指标能有效反映不同转速下ADFD对转子系统不平衡振动的影响，基于灵敏度分析能确定ADFD有效减振工作转速的范围；不同正压力范围下的灵敏度分析结果能用于正压力控制策略的优化设计，防止潜在的振动恶化。

关键词: 主动干摩擦阻尼器, 转子系统, 敏感性分析, Morris方法, 振动控制

Abstract: For the rotor system supported by active dry friction dampers(ADFD), the controllability of ADFD friction damping levels makes the unbalanced rotor vibration can be turned by ADFD’s normal forces, in which case analyzing the influences of ADFD on rotor unbalanced vibrations via quantitative indicators would be beneficial for reasonable controller design. To solve this problem, the Morris method is proposed to quantify the sensitivity of rotor unbalanced vibrations with respect to the changes of ADFD clamping forces. The variation of unbalanced response sensitivities for different axial locations are investigated under different rotational speeds and normal force ranges, and the results are further used for the choices of control objectives as well as the controller parameters. It was revealed by both numerical and experimental investigations that, by choosing the unbalanced response of the axial position with largest sensitivity metrics as the control objective, certain rotor vibration modes can be controlled effectively. The sensitivity indices could reflect the influences of ADFD on rotor unbalanced vibrations, thus the operating speeds with effective vibration attenuation performances can be determined for the ADFD. The sensitivity analysis results under different normal force ranges can be used for the optimization of control strategies, which can pretend potential vibration deteriorations.

Key words: active dry friction damper, rotor system, sensitivity analysis, the Morris method, vibration control

中图分类号:

TB535

蒋明宏, 高象宏, 张鹏, 祝长生. 主动干摩擦阻尼器参数敏感性分析及控制策略设计[J]. 机械工程学报, 2025, 61(20): 328-338,348.

JIANG Minghong, GAO Xianghong, ZHANG Peng, ZHU Changsheng. Parametric Sensitivity Analysis and Design of Control Strategies for Active Dry Friction Dampers[J]. Journal of Mechanical Engineering, 2025, 61(20): 328-338,348.

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