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以我国自主设计的某第三代核电站反应堆厂房内置换料水箱和外层安全壳外挂水箱抗震设计为背景,采用附加质量法、光滑粒子流体动力学法(SPH)和耦合欧拉-拉格朗日(CEL)法进行了流固耦合分析,并对三种方法的计算结果和优缺点进行了对比。分析表明:相比于其他两种方法,附加质量法计算结果明显偏于保守;当粒子的数量足够多时,SPH法的计算结果与CEL法较为接近,但大量粒子的引入会影响计算效率;CEL法是三种分析方法中计算精度最高的一种,但用CEL法分析复杂异形水箱时容易出现漏水问题。针对实际工程中不同的流固耦合问题,应选择合适的分析方法。
Based on the seismic design of the built-in refueling water tank and the outer containment tank of a third-generation nuclear power plant in our country, the additional mass method, smooth particle hydrodynamics (SPH) and coupled Euler-Lagrange Day (CEL) method of fluid-structure coupling analysis, and the results of the three methods and advantages and disadvantages were compared. The results show that compared with the other two methods, the results of the additional mass method are obviously conservative. When the number of particles is enough, the calculation results of SPH method are close to those of CEL method, but the introduction of a large number of particles will affect the computational efficiency. Act is the highest accuracy of the three analytical methods, but the CEL analysis of complex shaped water tank prone to leakage problems. In view of the different fluid-solid coupling problems in practical engineering, a suitable analytical method should be selected.