CAJ | 학술논문

孔隙式粘滞流体阻尼器除了阻尼力外还有附加刚度特性。在混有空气的情况下，流体阻尼器效能会发生改变，对附加刚度有显著影响。为了研究并预测混有空气的流体阻尼器的动态特性，从混有空气的流体非线性阻尼力和非线性弹性力串联模型出发，通过分析计算非线性阻尼器的等效线性阻尼和弹性，建立了便于工程实际应用的流体阻尼器线性并联模型，分析了混有空气的流体阻尼器在不同频率和位移工况下效能和附加刚度的变化。通过对孔隙式粘滞流体阻尼器的动态特性试验，验证了分析方法和等效线性模型的正确性。
공극식점체류체조니기제료조니력외환유부가강도특성。재혼유공기적정황하，류체조니기효능회발생개변，대부가강도유현저영향。위료연구병예측혼유공기적류체조니기적동태특성，종혼유공기적류체비선성조니력화비선성탄성력천련모형출발，통과분석계산비선성조니기적등효선성조니화탄성，건립료편우공정실제응용적류체조니기선성병련모형，분석료혼유공기적류체조니기재불동빈솔화위이공황하효능화부가강도적변화。통과대공극식점체류체조니기적동태특성시험，험증료분석방법화등효선성모형적정학성。
Orifice-type viscous dampers exhibit a hysteresis behavior which is explained by additional stiffness. When the throttled fluid is mixed with air,its efficiency and additional stiffness will be changed.To study the dynamic characteristics of the damper mixed with air,the nonlinear damping force and nonlinear elactic restoring force in a serial connection model were calculated.Then an equivalent linear damping and linear stiffness were derived to established a linear parallel connection model which is convenient in practical applications.The efficiency and additional stiffness of dampers mixed with air at different frequencies and under different amplitudes were discussed.The experimental results of viscous dampers imply the method and model are both correct.