为了探究材料性能参数对液弹阻尼器动态特性的影响规律，采用电液伺服动态试验机研究了液弹阻尼器的载荷—位移曲线、弹性刚度、阻尼刚度和损耗因子随橡胶硬度和阻尼液粘度的变化。试验结果表明：液弹阻尼器91.5%以上的弹性刚度由橡胶部分提供，并且弹性刚度随橡胶硬度的增大而增大。液弹阻尼器84.8%以上的阻尼刚度由阻尼液提供，并且阻尼刚度和损耗因子随阻尼液粘度的增大而增大，随剪切振幅的增大而减小，阻尼液粘度越大阻尼刚度和损耗因子下降幅度越大。当阻尼液粘度由2000mm2/s增大到10000mm2/s时，液弹阻尼器的阻尼刚度由2420N/mm增大到5163N/mm；当剪切振幅由0.2mm增大到1.5mm时，阻尼刚度分别减小18.5%和40.1%。以上结论可为液弹阻尼器的选材提供依据。
Abstract
In order to investigate the influence law of material performance parameters on the dynamic characteristics of the fluid-elastomeric damper, the variation of load-displacement curve, elastic stiffness, damping stiffness and loss factor of the fluid-elastomeric damper with the difference of rubber hardness and damping fluid viscosity were studied by electro-hydraulic servo dynamic testing machine. The test results showed that more than 91.5% of the elastic stiffness of the fluid-elastomeric damper is provided by the rubber part, and the elastic stiffness increases with the increase of rubber hardness. More than 84.8% of the damping stiffness of the fluid-elastomeric damper is provided by the damping fluid, and the damping stiffness and loss factor increase with the increase of the viscosity of the damping fluid and decrease with the increase of the shear amplitude. The greater the viscosity of the damping fluid, the greater the decrease of the damping stiffness and loss factor. When the viscosity of damping fluid increases from 2000 mm2/s to 10000 mm2/s, the damping stiffness of the fluid-elastomeric damper increases from 2420 N/mm to 5163 N/mm. when the shear amplitude increases from 0.2 mm to 1.5 mm, the damping stiffness decreases by 18.5% and 40.1%, respectively. The above conclusions can provide a basis for the selection of materials for fluid-elastomeric damper.
关键词
液弹阻尼器；载荷&mdash /
位移曲线；弹性刚度；阻尼刚度；损耗因子
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Key words
fluid-elastomeric damper /
load displacement curve /
elastic stiffness /
damping stiffness /
loss factor
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参考文献
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