附加粘滞阻尼器的球形储罐减震性能研究

球罐作为石油化工行业的重要存储容器，一旦在服役期间发生破坏，不仅将造成重大经济损失，而且易发生重大人员伤亡事故。用ADINA分析软件建立了球罐的设计模型及简化理论模型，并研究了附加粘滞阻尼器的速度指数与配置方案对球形储液罐减震的影响。利用达朗贝尔原理建立动力方程，采用非线性动力方程计算其基底剪力值，与有限元法计算结果对比分析。研究结果表明:当速度指数为0.3的时候，在地震动作用下其结构柱顶的加速度变大；当速度指数大于等于0.7时，滞回曲线明显变扁，耗能减震的效率降低到15%以下。相对于全布置方案，按方案7在布置粘滞性阻尼器，球罐基底剪力、柱顶速度、柱顶位移、拉杆应力及拉杆拉力的控制上，效果能达到全布置方案的60%以上，在波高的控制上能达到70%以上。有限元验算与计算结果较为吻合，可为后续的研究应用提供参考依据。粘滞阻尼器有助于球罐结构减震，但粘滞阻尼器的参数和配置方案应综合考虑工程的实际情况而定。

Study on shock absorption performance of spherical tank with viscous damper

As an important storage container in the petrochemical industry, spherical tank will not only cause great economic loss, but also easily cause great casualties once it is damaged in service. In this paper, the design model and simplified theoretical model of the spherical tank were established by the ADINA analysis software, and the influence of velocity index and configuration scheme of viscous damper on vibration absorption of spherical tank was studied. In addition,by using the d’Alembert principle,the dynamic equation was established.By using the nonlinear dynamic equation,the based shear force was calculatedand the results were compared with that obtained by finite element method. It is shown that when the velocity index was 0.3, the acceleration of the top of the structural column increases under the earthquake action. When the velocity index was greater than or equal to 0.7, the hysteretic curve becomes obvious flat and the energy dissipation and vibration absorption efficiency decreases to below 15%. Compared with the full layout scheme, if the viscous damper was arranged according to the scheme 7, the effect of the base shear force of the spherical tank,the speed of the column top,the displacement of the column top,the stress of the tie rod and the tensile force of the drawbar can reach more than 60% of the full layout scheme,and the control of wave height can reach more than 70%.The finite element calculation verified the result by the theoretical model, which can provide reference for the future study. Viscous dampers are helpful to the vibration absorption of the spherical tanks, but the parameters and layout scheme of the viscous dampers should be based on the actual engineering conditions.