非规则环形圆柱水箱液体晃动动力特性试验

摘要

冷却水箱是核电厂非能动安全壳冷却系统(PCS)的重要组成部分.水箱中液体晃动频率低,在长周期地震动作用下容易发生大幅晃动,因此在进行核岛结构动力分析时,必须要考虑水箱结构的影响,研究其动力特性.本文通过振动台试验测试了水箱中液体的动水压和波高衰减数据,计算求得液体的晃动频率和阻尼比,并将试验结果与数值分析、等效模型理论计算结果进行比较.研究表明:采用的数值分析和等效模型理论方法能够较好地模拟试验结果,可被用来分析PCS水箱液体晃动动力特性,通过对比验证了试验测试方法的准确性以及等效模型计算方法的实用性.%A cooling water tank is an important component of a passive containment cooling system ( PCS) of an ad-vanced nuclear power plant.Large-amplitude sloshing occurs easily under long-period earthquakes because of the low sloshing frequency of liquid.Therefore, the dynamics of a cooling water tank must be considered when the nu-clear power plant is analyzed.The hydrodynamic pressure and attenuation data of wave height in shaking table test are measured and used to calculate the sloshing frequencies and damping ratio of liquid.Moreover, test results are compared with those from numerical analysis and theoretical calculation of equivalent model..This study demonstra-ted that the numerical analysis and equivalent model could properly simulate the test results and analyze the slos-hing dynamics of the liquid in a PCS water tank.It is proved that the proposed measuring method is accurate and the proposed equivalent model is reasonable.