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Simulation for a Floating Roof Behavior of Cylindrical Storage Tank due to Wind Load: Part 2 — Sloshing Response Analysis

[+] Author Affiliations
Shoichi Yoshida, Masaki Shiratori, Kazuyoshi Sekine

Yokohama National University, Yokohama, Japan

Shinichi Kuroda, Hidesaku Uejima

IHI Corporation, Yokohama, Japan

Kazuo Ishida

IHI Corporation, Tokyo, Japan

Tomohiko Tsuchida, Katsuki Iwata

Japan Oil, Gas and Metals National Corporation, Tokyo, Japan

Paper No. PVP2012-78163, pp. 103-114; 12 pages
doi:10.1115/PVP2012-78163
From:
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 4: Fluid-Structure Interaction
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5503-4
  • Copyright © 2012 by ASME

abstract

The floating roofs are used in large cylindrical storage tanks to prevent evaporation of oil. The single-deck floating roof, considered herein, consists of a thin circular plate called “deck” attached to a buoyant ring of box-shaped cross section called “pontoon”. The deck plates are deformed to create waves and they are subjected to cyclic bending due to wind load. This phenomenon may lead to initiate fatigue cracks at the welding joints. It is important to know the vibration characteristics of the waves in the deck plate. The authors have reported a CFD analysis of a cylindrical storage tank due to uniform wind flow in another paper. This paper presents the axisymmetric finite element analysis for the sloshing response of the single-deck floating roofs in a cylindrical storage tank subjected to wind load obtained by the CFD analysis. It is assumed that the liquid is incompressible and inviscid, and the roof is linear elastic while the sidewall and the bottom are rigid. The basic vibration characteristics of the waves in the deck plate, such as frequency and amplitude, are investigated.

Copyright © 2012 by ASME

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