摘要
针对惯导敏感元件的振动隔离问题,提出一种小型流体阻尼隔振器,采用金属膜片作为弹性元件,通过黏性流体间隙流动产生阻尼耗能。给出计算金属膜片挠度的解析式,建立隔振器动力学模型,获得刚度-阻尼并联的两参数模型的动刚度表达式,进而分析两参数原理模型的振动传递特性,给出根据隔振性能指标设计刚度、阻尼的方法。根据测试与理论计算结果,二者的加速度传递率曲线吻合良好,且实验结果表明可将共振峰值抑制在6 dB以下。
To isolate the vibration for sensitive instruments,a mini vibration isolator with fluid damping was presented.A metal diaphragm was used as an elastic element and the viscous fluid was used to dissipate vibration energy.The analytical expression for the deflection of the metal diaphragm was derived.Then a dynamic model of the vibration isolator was established,and the dynamic stiffness expression of a two-parameter model with stiffness-damping in parallel was also obtained.By analyzing the vibration transmission characteristics,a method for designing the stiffness and damping coefficients according to the vibration isolation performance requirement was proposed.The experimental and theoretical results agree well in terms of acceleration transmission rate,and the result shows that the resonance peak can be suppressed below 6 dB.
作者
黄子祥
杨德权
蒋圣鹏
张志谊
HUANG Zixiang;YANG Dequan;JIANG Shengpeng;ZHANG Zhiyi(Institute of Vibration,Shock and Noise,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Mechanical Systems and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2021年第14期180-185,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51875363)。
关键词
振动与波
振动隔离
金属膜片
流体阻尼
两参数模型
vibration and wave
vibration isolation
metal diaphragm
fluid damping
two-parameter model
