间隙式粘滞阻尼器温度变化对滞回性能影响的研究
首发时间:2018-11-29
摘要:为了探究间隙式粘滞阻尼器温度变化对其滞回性能的影响,试验监测了不同加载频率下间隙式粘滞阻尼器缸筒外壁温度及出力的变化,结果表明加载速度越快缸筒外壁温度上升越快,滞回曲线所围面积缩小越快。基于Fluent软件采用热流固耦合方法来仿真模拟粘滞阻尼器中流体运动摩擦生热及传热等过程,得出了间隙式粘滞阻尼器自身温度变化对滞回性能的影响。模拟曲线与试验曲线基本吻合,验证了通过模拟仿真手段对间隙式粘滞阻尼器的力学性能分析的合理性。间隙式粘滞阻尼器在持续往复工作中缸筒内部粘滞液体温度升高导致阻尼器滞回性能下降且与速度相关的。并提出了对间隙式粘滞阻尼器的改进意见。
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A study on hysteretic behavior of clearance viscous damper influenced by temperature
Abstract:To study the hysteretic behavior of clearance viscous damper influenced by temperature, the temperature of cylinder outer wall and damping force were monitored at different loading frequencies. The results indicate that the faster the loading speed is, the faster the temperature of cylinder outer wall rose, and the smaller the area of hysteresis curve is. Based on Fluent, two thermal-liquid-solid coupling surfaces were established to stimulate the process of viscous liquid motion. The influence of temperature variation on hysteresis behavior of clearance viscous dampers is obtained. The simulation curve basically coincides with the test curve, which confirms the reasonability of the stimulation. The decline in hysteretic behavior of clearance viscous damper is caused by the increasing temperature of viscous liquid during its continuous reciprocating motion and positively related to velocity. Two improvements of viscous damper for heat dissipation are suggested.
Keywords: civil building structure clearance viscous damper temperature hysteretic behavior
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间隙式粘滞阻尼器温度变化对滞回性能影响的研究
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