应用液压阻尼系统(HDS)控制储罐地震响应

为了有效地提高立式圆柱钢制储罐的抗震性能,采用液压阻尼系统(HDS)控制储罐的地震响应.建立了HDS-储罐力学分析模型和储罐的控制目标,通过时程分析法研究了HDS控制参数对储罐动力特性和地震响应的影响规律.结果表明:增大α、c0(液压缸内截面与管路内截面的面积比、阻尼系数),均可提高阻尼比;增大k0(HDS系统中液体的刚度系数)阻尼比降低.增大α,圆频率比减小;增大k0,圆频率比增大,c0的改变不影响圆频率.增大α、k0,c0都能减小有控储罐的位移和绝对加速度反应峰值,有效地减小储罐的地震响应;其中c0的影响最大.HDS对储罐的液固耦合点位移和倾覆力矩控制效果良好,达到50%以上,烈度可降低一度进行储罐的抗震设计.

Seismic response control of storage tank with hydraulic damper system

In order to increase the seismic behavior of vertical steel storage tank,hydraulic damper system(HDS) is adopted to control seismic response of storage tank.Mechanics model of storage tank with HDS and controlled objects were set up.Affection law of the control parameters in HDS to dynamic performance and seismic response of the storage tank was discussed by time history analysis.Results show that the damping ratio is advanced with the increment of α(inter sectional area ratio of hydraulic cylinder to pipeline) and c0(damper coefficient of liquid),which is reduced with the increment of k0(stiffness coefficient of liquid).Circular frequency ratio is decreased with the increment of α,which is up with the increment of k0.The change of c0 cannot affect circular frequency ratio.With the increase of parameters α,k0,c0,the peak value of displacement and absolute acceleration are diminished with the control and the seismic response of tank is reduced effectively;the effect of c0 is better than others.The control effect of HDS on displacement and capsizing moment of liquid-solid coupling particle is good,it can reduce 50%.Storage tank can be seismic designed by reducing one degree of intensity.