密封油对大型储气柜柜体抗震性能的影响分析

在稀油密封储气柜结构中,密封油存储于活塞四周与柜体壁板之间的环形油沟中,在储气压力下与活塞一起悬浮于柜体中。随着储气柜向大容量、高压力方向发展,密封油的重量显著增加。在气柜结构的地震反应计算模型中,如何考虑密封油对气柜柜体抗震性能的影响,鲜有文献介绍。本文依据气柜的实际结构,将密封油视为环形液体阻尼器,建立气柜结构的CLD计算模型。以某30万m~3正多边形气柜为例,选择3条地震波,应用状态空间分析法,利用MATLAB软件实现2种计算模型的地震反应分析。计算结果对比分析表明,密封油对柜体抗震具有明显的减震效果,属于有利影响。

Study on the Damping Effect of Seal Oil on the Seismic Performance of Large-scale Gasholder

In the gashoder with oil-sealing, the seal oil stores in the circular channel between the piston side and gasholder wall plate and suspends with the piston in gasholder under the gas pressure. With the dry gasholders tend to be high-capacity and high pressure, the weight of seal oil increases evidently. There is no report about the effect of seal oil on the seismic performance of gasholder in its calculation model of seismic response. In this paper, based on the actual construction features of gasholder , taking the piston as a circular liquid darner （ CLD ）, the CLD calculation model for seismic design is established. Taking a regular polygon 300,000m^3 gasholder as an example, selecting 3 earthquake waves, the seismic responses for two models are calculated by applying state-space analysis method and MATLAB. The calculation results show that the seal oil has an evident positive damping effect on the seismic performance of gasholder.