浮动核电站系统典型用泵动力吸振器的设计

浮动核电站系统典型用泵（典型泵）在系统运行期间振动线谱突出，加大了整个系统的振动水平。本文以典型泵在49 Hz处的振动特征线谱为控制对象，开展动力吸振器的设计研究。结合系统运行环境、吸振器吸振原理、安装方式等多方面因素，初步提出吸振器设计参数，并探讨吸振器几何参数、质量、阻尼对吸振频率的影响；建立典型泵的动力吸振器有限元模型，验证动力吸振器的吸振效果，并分析吸振器质量、阻尼、安装个数对吸振性能的影响。结果表明:动力吸振器满足在8~400 Hz的频率范围内可调，加装动力吸振器后典型泵在49 Hz处的振动线谱控制效果可达到7.3 dB。 

Design of Dynamic Vibration Absorber for Floating Nuclear Power Station Pumps

The vibrations in the line-spectrum of the floating nuclear power station pumps(the typical pump) are notable during the system operation, which increases the vibration level of the whole system. In this paper, taking the vibrations in the specific frequencies at 49 Hz of the typical pump as the research object, a dynamic vibration absorber is designed. Based on the related factors such as the system operation environment, dynamic vibration absorbing principle and installation method, this paper initiates the design parameters of the vibration absorbers, and then explores the effects of geometrical parameters, mass, damping on vibration absorption frequency band. The FEM model of the typical pump with dynamic vibration absorber is developed, which verifies the absorbing effect of dynamic vibration absorber. The effects of mass, damping and numbers of the dynamic vibration absorber on absorbing effect are analyzed. The results show that the dynamic vibration absorber can be adjusted within the frequency range of 8~400 Hz after adding the dynamic vibration absorber, and the absorbing effect in the line-spectrum vibration of a typical pump at 49 Hz can reach 7.3 dB.