摘要
由于载荷变化会削弱准零刚度隔振器的隔振特性,设计了一种可变负载的准零刚度隔振器。首先,阐述了该隔振器的隔振原理,建立了数学模型,分析了隔振器的静力学特性;其次,采用平均法研究了振动的主共振响应,得到了相对位移的幅频特性及振动的位移传递率,并分析了隔振参数对振动特性的影响。研究结果表明:该隔振器可以通过改变准零刚度弹簧的夹角,来适应负载的变化,而且角度增加能削弱共振,降低起始隔振频率;隔振器同时还具有渐硬-渐软特性,能压缩共振频段,降低向下跳跃频率,可变负载的准零刚度隔振器低频隔振性能优于普通准零刚度隔振器。
A quasi-zero-stiffness vibration isolator with a variable load is designed to make up for the weakened ability to isolate vibration caused by the changed load. First, the principle of the vibration isolator is discussed in terms of its static characteristics based on its mathematical model. Then, the main resonance response is analyzed by the averaging method including the amplitude-frequency characteristic function of relative displacement and the displacement transfer rate of vibration. Besides, the rules of vibration changing with the parameters are investigated. The results show that the vibration isolator adapts to load by changing the angle of the quasi-zero-stiffness spring when the resonance is weakened and the initial isolation frequency is reduced with increasing angle. The vibration isolator is also characterized by gradual hardening, which compresses the resonant frequency bandwidth and reduces the descending frequency so that the quasi-zero-stiffness isolator with variable load excels the normal one in the low-frequency isolation performance.
作者
康冰冰
李海军
林学森
王景霖
邓力
KANG Bingbing;LI Haijun;LIN Xuesen;WANG Jinglin;DENG Li(Aviation Foundation Institute,Naval Aviation University Yantai,264001,China;Coast Defense Army Institute,Naval Aviation University Yantai,264001,China;Aviation Key Laboratory of Science and Technology on Fault Diagnosis and Health Management Shanghai,201601,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2020年第3期501-506,625,共7页
Journal of Vibration,Measurement & Diagnosis
关键词
准零刚度
隔振
平均法
可变负载
quasi-zero-stiffness
vibration isolator
averaging method
variable load
