Abstract

Basic approaches are outlined to solving complex engineering problems arising in the design and operation of power units at nuclear power stations (NPS) and based on large-scale physical simulation of dynamic conditions and parameters of dynamics and structural strength of modern power facilities. A procedure for physical simulation of specific dynamic processes in hydroelastic systems has been developed. Taking into account the identified distributions of pressure pulsations and flow rates on the surfaces of the structures of the investigated reactor plants (RU), hydrodynamic loads in various structures and facilities of modern power-machine buildings were determined considering the found distribution of fluctuations in flow pressure and velocity acting on the structure surfaces. The dynamic response parameters of the main structural members, such as dynamic strains and stresses, were obtained and analyzed. The effect of added masses of liquid, damping, and other factors on the dynamic processes in hydroelastic systems and ways for its reduction to increase the durability and service life of structures, first of all the critical elements of the studied power systems for each commissioned reactor, are determined. This approach is based on a comprehensive investigation of the interaction of a turbulent flow with the multicomponent structure of a reactor unit. The results of investigation confirmed the structure serviceability as to the relative error. The fitness for service of a structure during a specified operation time of the power unit was assessed. The implementation of the proposed approach involving large-scale physical simulation and, in many cases, numerical modeling, confirmed its effectiveness and the validity of the results obtained by the authors.

中文翻译：

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核电站水力弹性系统动力学过程的物理模拟

摘要

概述了解决核动力站（NPS）动力装置的设计和运行中出现的复杂工程问题的基本方法，并基于动态条件的大规模物理模拟以及现代动力设施的动力学和结构强度参数。已经开发了一种对水弹性系统中特定动力学过程进行物理模拟的程序。考虑到已确定的被调查反应堆工厂（RU）结构表面上压力脉动和流量的分布，考虑到所发现的流量波动分布，确定了现代动力机械建筑物各种结构和设施中的流体动力负荷作用在结构表面上的压力和速度。主要结构构件的动力响应参数，如动态应变和应力，获得和分析。液体，阻尼和其他因素的增加对水弹性系统动力学过程的影响及其减少方法以增加结构的耐用性和使用寿命，首先是每个调试反应堆研究的电力系统的关键要素，确定。该方法基于对湍流与反应堆单元多组分结构相互作用的综合研究。调查结果确认了相对误差的结构适用性。评估了在功率单元的指定运行时间内结构的适用性。拟议方法的实施涉及大规模物理模拟，在许多情况下还包括数值建模，