Experimental and numerical analysis of container multiple stacks dynamics using a scaled model

Vinicius Aguiar De Souza, Levent Kirkayak, Ikumu Watanabe, Katsuyuki Suzuki, Hideyuki Ando, Hidetoshi Sueoka, Huseyin Darama

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

This research aim to understand the mechanical behavior of container stacks under predefined driving excitation emulating real maritime conditions. The objects of study are scaled models (Froude scaling) of a 20 ft ISO freight container and its linking connectors, i.e., twist locks arranged in three adjacent seven-tier stacks. In the first stage of the study: a series of experiments were performed, using a shaking table, to build a database to calibrate a numerical model. The second stage of the study used a numerical model (F.E.A.) to understand the effect of structural changes and basic vibrational variables on the structural response of the stacks. The numerical analysis incorporates contact using the Kelvin-Voigt model. From the results it is possible to identify how each variable affects the structural response. Additionally, it is possible to calculate explicitly the loads on critical points of the structure. The evidence from this study suggests that the use of discrete damping elements, decreasing gap size and joining stacks, may help to minimize the structural response of the container stacks. The modeling of such a problem may provoke profound modifications on the current methods used to calculate loads on the stacks and securing (lashing) systems.

Original languageEnglish
Pages (from-to)218-232
Number of pages15
JournalOcean Engineering
Volume74
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Container stack dynamics
  • Finite element analysis
  • Froude scaling
  • Pitching
  • Rolling
  • Shaking table testing

ASJC Scopus subject areas

  • Environmental Engineering
  • Ocean Engineering

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