The Effect of Spacer Grids on the Formation of Added Mass under the Bending Vibrations of a Fuel-Element Bundle in a Covered Fuel-Element Assembly of a VVER-440 Reactor

被引：0
|
作者：
Sorokin, F. D. [1 ]
Perevezentsev, V. V. [1 ]
Krutko, E. S. [2 ]
机构：
[1] Bauman Moscow State Tech Univ, Moscow, Russia
[2] Kurchatov Inst, Sci Res Ctr, Moscow, Russia
来源：
JOURNAL OF MACHINERY MANUFACTURE AND RELIABILITY | 2019年 / 48卷 / 02期
关键词：
VVER; fuel-element assembly; hydroelastic vibrations; spacer gratings; added mass; FLUID;
D O I：
10.3103/S1052618819020146
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A significant effect of spacer gratings exerted on the dynamic characteristics of the covered fuel-element assemblies is shown. The calculated and experimental values of the added mass in the course of the bending vibrations of a bundle of fuel elements (fuel elements) are in good agreement between each other only when taking into account the flow of liquid in a narrow gap between the hexahedral surface of the spacer gratings and the hexahedral border of the cover of fuel-element assemblies. The small dimensions inherent in the spacer gratings in the axial direction of fuel-element assemblies lead to uneven distribution of the added mass along the length of the fuel-element assemblies, which is a significant factor in the study of bending oscillations of a bundle of fuel elements in liquid.
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页码：104 / 110
页数：7
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