复杂流域中异型结构附加质量精细化计算方法研究  

Study on Refined Calculation Method for Added Mass of Special-shaped Structures in Complex Fluid Domain

作　　者：谈熙明 高付海[1] 齐敏[1] 王月英[1] 刘兆阳[1] Tan Ximing;Gao Fuhai;Qi Min;Wang Yueying;Liu Zhaoyang(China Institute of Atomic Energy,Beijing,102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核动力工程》2023年第4期100-106,共7页Nuclear Power Engineering

摘　　要：反应堆堆内构件工程设计通常采用附加质量方法模拟流体对结构的动力作用。以浸没在复杂流域中某异型压力管为例,提出了一种结构附加质量迭代计算方法,即以声固耦合分析得出的湿模态为基准,综合考虑流体密度和体积模量精细化确定结构附加质量,并讨论了该方法的适用范围。通过压力管1∶1振动试验实测与仿真结果对比,证明了附加质量精细化计算的准确性。结果表明,本文方法能较为精确地获得结构的主频和振型,具有较快的收敛速度,可供类似工程仿真分析参考借鉴。The engineering design of reactor internals usually uses the added mass method to simulate the dynamic effects of fluids on the structure.Taking a special-shaped pressure pipe immersed in a complex fluid domain as an example,a structural added mass iterative calculation method is proposed,which uses the wet mode obtained from the acoustic-structure coupling analysis as the benchmark,comprehensively considers the fluid density and bulk modulus to determine the structural added mass,and discusses the applicability of this method.The accuracy of the added mass calculation has been demonstrated by comparing the measured and simulated results of the 1∶1 vibration test of the pressure pipe.The results show that the method proposed in this paper can accurately obtain the main frequency and vibration mode of the structure,and has a fast convergence speed,which can be used as a reference for similar engineering simulation analysis.

关 键 词：复杂流域 异型结构 声固耦合 附加质量 振动试验 

分 类 号：TL364[核科学技术—核技术及应用]