NDLI: Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 2 — Details of Characteristics for Disc Springs and Oil Dampers on Basis of Full-Scale Loading Tests

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Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 2 — Details of Characteristics for Disc Springs and Oil Dampers on Basis of Full-Scale Loading Tests

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Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 2 — Details of Characteristics for Disc Springs and Oil Dampers on Basis of Full-Scale Loading Tests

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Somaki, Takahiro Fukasawa, Tsuyoshi Miyagawa, Takayuki Yamamoto, Tomohiko Hibako, Yoshifumi Okamoto, Masanari Noda, Osamu Ishizuka, Futoshi
Copyright Year	2018
Abstract	Being compatible with the seismic and thermal loads for the large Sodium-cooled Fast Reactor (SFR), the three-dimensional isolation system is inevitable technology. The three-dimensional isolation system consists of the thick rubber bearings, the disc springs and the oil dampers. Since the isolation performances on the rubber bearings in the horizontal direction have been revealed by the previous studies [1], the vertical isolation performance and characteristics such as restoring force and damping performance should be clarified by loading tests to build the analytical model. This paper presents these fundamental vertical isolation characteristics obtained by loading tests with full-scaled disc springs and oil dampers. The disc springs as the vertical restoring forces have 700 mm in external diameter and 34 mm in thickness. The oil dampers have the maximum damping force of 2,000 kN at the velocity of 0.25 m/s. The disc spring is one of the largest size, and the oil damper is one of the largest damping capacity in Japan. The static loading tests such as incremental cyclic loadings under the supporting load were conducted to investigate the restoring force characteristics for the disc springs. The dynamic loading using sinusoidal waves with varied input frequencies or the seismic response waves obtained by seismic response analysis were conducted to investigate the damping performance for the oil dampers. The applicability of the design method and the analytical model for disc springs and oil dampers were demonstrated by the restoring force characteristics obtained from tests. It should be noted, this paper is in series from Part 1.
Sponsorship	Pressure Vessels and Piping Division
File Format	PDF
ISBN	9780791851715
DOI	10.1115/PVP2018-84491
Volume Number	Volume 8: Seismic Engineering
Conference Proceedings	ASME 2018 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2018-07-15
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Damping Dampers Design methodology Bearings Dynamic testing (materials) Waves Stress Knudsen number Industrial research Disks Rubber Springs Sodium fast reactors
Content Type	Text
Resource Type	Article

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