刘国勇1,赵鹏鹏1,贺国徽2,朱冬梅1.新型抗偏载变摩擦阻尼器力学特性研究[J].湖南大学学报:自然科学版,2021,(8):1~10
新型抗偏载变摩擦阻尼器力学特性研究
Research on Mechanical Characteristics of a New Anti-eccentric Load Variable Friction Damper
  
DOI:
中文关键词:  阻尼器  变摩擦  耗能能力  滞回曲线  稳定性
英文关键词:damper  variable friction  energy dissipation  hysteresis curve  stability
基金项目:
作者单位
刘国勇1,赵鹏鹏1,贺国徽2,朱冬梅1 (1.北京科技大学 机械工程学院北京 100083 2.中国铁建重工集团股份有限公司湖南 长沙 410100) 
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中文摘要:
      为提高传统摩擦阻尼器的耗能能力及耗能稳定性,提出并设计一种新型变摩擦阻尼器. 通过采用反向不连续斜坡结构设计与蝶形弹簧组合,新型变摩擦阻尼器能够实现变阻尼力输出特性且有一定的抗偏载能力,在结构中增加副摩擦板,可有效提高阻尼器耗能能力. 首先,通过建立理论模型分析阻尼器在不同工作阶段的力学特性,并对各个设计参数对阻尼器的阻尼输出特性影响进行分析. 在此基础上,设计加工原理样机并进行力学特性试验研究. 最后,通过有限元方法对隔振器的抗偏载能力进行验证. 结果表明:新型变摩擦阻尼器试验结果与理论分析吻合;滞回曲线呈“狗骨形”,即,可实现变阻尼力输出特性;摩擦耗能能力与普通平板摩擦阻尼器相比可大幅度提高耗能能力;通过调整扭矩值可实现不同的阻尼特性输出,以实现不同的隔振需求.分析结果表明,新型变摩擦阻尼器有一定的抗偏载能力.
英文摘要:
      A new type of variable friction damper is proposed and designed to improve the energy dissipation capacity and stability of the traditional friction damper. The new variable friction damper can achieve variable damping force output characteristics and have a certain anti-eccentric load capacity by adopting a reverse discontinuous slope structure design and a butterfly spring combination, and it can effectively improve the energy dissipation capacity of the damper, because the auxiliary friction plate is also added to the structure. Firstly, the mechanical characteristics of the damper in different working stages are analyzed by establishing a theoretical model, and the influence of various design parameters on the damping output characteristics of the damper is analyzed. Based on this, a prototype of the processing principle was designed and the mechanical characteristics were experimentally studied. Finally, the anti-eccentricity of the isolator was verified by the finite element method. The results show that the test results of the new variable friction damper are consistent with the theoretical analysis;the hysteresis curve is “dog-bone”,that is,the output characteristic of variable damping force can be achieved;compared with ordinary flat friction dampers,the frictional energy consumption can greatly improve the energy consumption capacity. Different damping characteristic outputs can be achieved to obtain different vibration isolation requirements by adjusting the value of the torque. The analysis results show that the new variable friction damper has a certain resistance to eccentric load.
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