Relationship of a moored vessel in a harbour and a long wave caused by wave groups

Toshihiko Nagai, Noriaki Hashimoto, Tadashi Asai, Isao Tobiki, Kazunori Ito, Takao Toue, Akio Kobayashi, Takao Shibata

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)


Loading operations failed at a berth in Sendai New Harbour in 1992. The vessels continuously moved along the berth, in spite of small wave heights and weak winds, which were much less than the criteria for loading operation at the berth. To clarify the cause of the failures, the authors analyzed the observed wave data. The phenomenon related to the time characteristics of wave groupiness. The vessels' motions were caused by the long waves that were bounded by wave groups. Mean Wave Group Period (Tḡ) proposed here, can explain the phenomenon.

Original languageEnglish
Pages (from-to)847-860
Number of pages14
JournalProceedings of the Coastal Engineering Conference
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 24th International Conference on Coastal Engineering. Part 1 (of 3) - Kobe, Jpn
Duration: Oct 23 1994Oct 28 1994

All Science Journal Classification (ASJC) codes

  • Ocean Engineering


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