【摘要】 通过数值计算方法,分析了粘弹性阻尼器的特征参数对减震效果的影响规律.考虑阻尼器的等效刚度系数不变而等效阻尼系数改变和等效阻尼系数不变而等效刚度系数改变两种情形,并分别选取加速度峰值为70gal和400 gal的El-Centro波、Taft波和天津波作用于无控和受控单层球壳,利用ANSYS进行非线性动力时程分析,得到球壳受控前后的最大节点位移、杆件的最大轴力、最大支座反力以及不同阻尼器参数情形下的减震系数.结果表明:阻尼器参数决定减震效果的好坏;不同地震波作用下的减震规律有所不同;罕遇地震作用下减震效果更明显.更多还原

【Abstract】 Numerical strategy is performed to investigate the influence of damper’s parameters to vibration effort.El-Centro wave,Taft wave and Tianjin wave with peak acceleration located at 70gal and 400gal are acted on the single-layer spherical reticulated shell with and without control respectively.Maximum nodal displacements and maximum axial forces as well as maximum support forces are gotten through non-linear dynamic time-history analysis by ANSYS software.Subsequently,the vibration reduction coefficients under different parameters are calculated.The results show that it is feasible to control the vibration arisen from earthquake by viscoelastic dampers,but the control effort is essentially influenced by the dampers’ parameters;the efforts of vibration reduction under different seismic waves are somewhat different,and it indicates that the damping effect is more obvious under rare earthquake.更多还原