Author(s): A. J. Van Der Hout; M. P. C. De Jong; F. Jaouen; O. J. Waals

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Keywords: Long waves; Infragravity waves; Moored ships; Nearshore terminals; Design methodology

Abstract: Over the last decades nearshore cargo terminals have become increasingly more common, for example for the transportation of LNG. Benefits include easy access to deep water and isolation of potentially dangerous cargo. However, long waves (infragravity waves) that occur at such exposed locations can lead to excessive vessel motions. Numerical methods that can calculate long-wave conditions have typically been developed and validated for the shallow coastal zone, say< 10 m depth. Therefore, it is relevant to understand the generation and propagation of long waves at intermediate depths (15-40 m) and their influence on ships moored nearshore. The Joint Industry Project HAWAII, the s HAllow WAter In Itiative, was started with that goal. The present paper summarises the results obtained from the first two phases of this initiative (2006-2012) ,with focus on numerical wave modelling. The main outcome is a design methodology from the offshore wave conditions to the downtime of a nearshore terminal. Further validation is foreseen in a third phase of this project (2015-2016) ,which will include dedicated 3D physical scale model tests in a shallow-water basin facility.

DOI:

Year: 2015