Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests

T. Somaki, Tsuyoshi Fukasawa, S. Okamura, Takayuki Miyagawa, M. Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, S. Fujita
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Abstract

The authors have been developing the three-dimensional isolation system for a Sodium-cooled Fast Reactor, and reported the details of characteristics of disc springs and vertical oil dampers on the basis of full-scale loading tests [1]. To clarify the fundamental characteristics of the three-dimensional isolation system, the loading tests using a half-scale assembled specimen have been planned, which is composed of a rubber bearing, disc spring units, the horizontal supporting functions, the smoothly sliding elements, and the rotate restraint elements. This paper describes each characteristic of the rubber bearings, disc springs and sliding element before assembling a half-scale specimen of the three-dimensional seismic isolation system by the static or dynamic loading. The applicability of design method, the scaling effect in disc springs, and the dependence on the friction coefficient of the sliding elements were investigated and confirmed. Additionally, the method of minimizing the variation of force-displacement relationships between four disc spring units, each of which has the three disc springs stacked in parallel and six disc springs stacked in series, was studied. It should be noted that this paper is in series from Part 2 [1] held on 2018PVP.
钠冷快堆三维隔离系统的研究与开发:第3部分:基于半尺度负荷试验的元件特性
作者一直在开发钠冷快堆的三维隔离系统,并在全尺寸加载试验的基础上详细报道了碟形弹簧和垂直油阻尼器的特性[1]。为了阐明三维隔震系统的基本特性,设计了由橡胶支座、碟形弹簧单元、水平支承功能、平滑滑动单元和旋转约束单元组成的半比例尺组合试件的加载试验。本文对三维隔震系统的橡胶支座、碟形弹簧和滑动元件的各项特性进行了描述,并对其进行了半比例尺的静力或动力加载组装。研究并验证了设计方法的适用性、盘形弹簧的尺度效应以及与滑动元件摩擦系数的相关性。此外,还研究了由3个盘簧并联堆叠和6个盘簧串联堆叠组成的4个盘簧单元间力-位移关系变化最小的方法。需要注意的是,本文是2018PVP上的第2部分[1]的系列文章。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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