摘要
针对大振幅低频振动控制问题,开展准零刚度隔振器分析研究。以拓宽准零刚度位移区为目标,创新提出重力倒摆式准零刚度结构,相比弹簧式准零刚度结构具有更宽的准零刚度范围,适用于大振幅振动的低频隔振。结合三弹簧式准零刚度结构进行多向隔振器设计,对比两种典型三弹簧式准零刚度特性,分析配置参数对刚度特性的影响。最后通过仿真验证了隔振器的多向隔振有效性,准零刚度结构显著降低了隔振频率,其中重力倒摆结构可降低隔振频率15 Hz以上。
To reduce the large amplitude low frequency vibration,the dynamic performances of a designed quasi-zero-stiffness vibration isolator were analysed.Aiming at widening the quasi-zero-stiffness displacement region,a gravity inverted pendulum quasi-zero-stiffness structure was innovatively proposed.Compared with the spring type quasi zero-stiffness structure,wider quasi-zero-stiffness displacement region was obtained,being suitable for isolation of low frequency vibration with large amplitude.By combinedly use of the three-spring type quasi-zero-stiffness structure,a multidirectional vibration isolator was designed.The quasi-zero-stiffness characteristics of two typical three-spring type structures were compared,and the influence of parameters on stiffness characteristics was analyzed.Finally,the effectiveness of the multidirectional vibration isolator was verified by simulation.It is shown that the quasi-zero-stiffness structure can significantly reduce the vibration isolation frequency,the gravity inverted pendulum structure can effectively reduce the vibration isolation frequency by more than 15 Hz.
作者
陈文华
黄伟稀
郝夏影
何涛
梁赟
CHEN Wenhua;HUANG Weixi;HAO Xiaying;HE Tao;LIANG Yun(National Key Laboratory on Ship Vibration&Noise,China Ship Scientific Research Center,Wuxi 214082,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第18期205-209,227,共6页
Journal of Vibration and Shock
基金
工信部高技术船舶科研项目([2019]360号)。
关键词
倒摆
准零刚度
大振幅
隔振
inverted pendulum
quasi-zero stiffness
large vibration amplitude
vibration isolation
