压缩空气储能电站地下储气库密封钢衬应力与疲劳分析OA

The stress and fatigue life of the steel lining with sealing function in underground air storage caverns of compressed air energy storage power stations are of vital importance for the safe and stable operation of power stations.Based on a domestic underground air storage cavern project for a compressed air energy storage power station under design,a finite element model is established for the underground air storage cavern with stiffening rings for sealing steel linings,and through sequential coupling thermal stress analysis in ABAQUS,the stress field of the lining structure under the action of air pressure-temperature cycles is simulated.Then,the fatigue life of the welds of the sealing steel lining is calculated in FE-SAFE.The results show that:(a)the stress of the sealing steel lining with stiffening rings is lower than that without stiffening rings,and in some parts,the stress of the stiffening rings is greater than that of the steel lining wall;and(b)the sealing steel lining with stiffening ring bears different stress amplitudes at different circumferential angles,the top and bottom are the parts with larger stress amplitudes and shorter fatigue lives of the sealing steel lining,therefore,the fatigue life of the sealing steel lining and the stiffening rings can be improved by setting the welds in the low stress amplitude areas.