核电站管路流致振动和噪声的数值模拟研究  

Numerical simulation of flow-induced vibration and noise in nuclear power plant pipelines

作　　者：王天富 唐科范[1,2] 章期文 牛迪迪 WANG Tian-fu;TANG Ke-fan;ZHANG Qi-wen;NIU Di-di(School of Naval Architecture,Ocean&civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;MOE Key Laboratory of Hydrodynamics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学水动力学教育部重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2021年第1期56-66,共11页Chinese Journal of Hydrodynamics

摘　　要：该文针对工程上亟待解决的管路流、固及声耦合引起的振动和噪声问题,综合应用专业软件ANSYS、FLUENT和ACTRAN,基于流固耦合算法计算流致振动,基于多步骤混合算法(DES,有限元求解Lighthill方程)计算流致噪声。数值模拟了复杂工况下实际工程管路的流动模态、结构湿模态和管内声模态,为通过错频避免这三个模态耦合共振提供了基础;定量分析了振源和声源分布,以及流致振动和噪声频谱,为通过流场控制实现流致振源和声源强度控制提供了数值模拟方案;定量评估了关键部位倒圆角的减振降噪方案的工程效果。通过与实验数据的比较,验证了流、固和声模态定量计算以及流固耦合振动频谱与管内流致噪声频谱定量计算的适用性,为解决相应工程问题提供了有效的数值模拟方法和关键参考数据。In this paper, the vibration and noise problems induced by the flow-structural-acoustic coupling in the pipelines,which have been the burning issues of the practical engineering, are numerically investigated. By using a combination application of specialty softwares: ANSYS, FLUENT and ACTRAN, the flow-induced vibration is calculated based on the flow-structure coupling algorithm, and the flow-induced noise is computed based on the multi-step hybrid approaches(DES/Finite element solution of Lighthill’s equation). Through the numerical simulations of the flow-structure-acoustic coupling in the practical pipelines under complicated working conditions, the flow mode, wet mode of structure and acoustic mode are calculated in order to provide a quantitative database for avoiding the coupling resonances by means of frequency staggering;and the distributions of vibration and noise sources are located and the frequency spectra of fluid-induced vibration and noise are compared, for controlling these sources by means of the flow-field control, so as to form a set of numerical simulation and quantitative evaluation approaches for the vibration and noise reduction of the pipelines;then the effectiveness of the vibration and noise reduction design with the key corner rounding is quantitatively evaluated. Through the comparison with the experimental data, the flexibility of the computational approaches of the flow, wet structure and acoustic mode, as well as the vibration and noise spectra induced by flow-structure and flow-acoustic coupling are validated, so that a series of numerical simulation approaches and the key reference data for the practical engineering are set up.

关 键 词：流固声耦合 流致振动数值模拟 流致噪声数值模拟 结构湿模态 减振降噪 

分 类 号：TV131.33[水利工程—水力学及河流动力学]