Oscillatory Forces on Square Cylinder and Cubes

E. D. Christensen*, F. Nielsen, M. Borup

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    51 Downloads (Pure)


    Large scale porous structures are a very common part of coastal and offshore structures such as breakwaters for coastal or harbors protection, and scour protection layers for offshore wind turbine foundations. Much research has been carried out on for instance breakwaters from a statistical point of view. This has led to design formulas. In this paper, we present an approach where the forces on large porous structures were measured directly. The goal was to investigate the variability of the wave forces on different structural elements depending on the spatial position in the protection layer. The study indicated that the elements or stones on the edge of a protection layer experienced the largest force away from the protection layer under the influence to an oscillatory outer flow (i.e. a simplification of wave dynamics). The KC-number ranged from 2 to 12. The results indicated a potentially spreading mechanism and explained instability of the outer positioned stones.
    Original languageEnglish
    Title of host publicationCoastal Structures 2019
    EditorsNils Goseberg, Torsten Schlurmann
    Place of PublicationKarlsruhe
    PublisherBundesanstalt für Wasserbau
    Publication date2019
    ISBN (Electronic)978-3-939230-64-9
    Publication statusPublished - 2019
    EventCoastal Structures 2019 - Hannover, Germany
    Duration: 30 Sept 20192 Oct 2019


    ConferenceCoastal Structures 2019

    Bibliographical note

    Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license is applicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the material of the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms of the restrictive license will be binding.


    • Oscillatory forces
    • Forces on cubes
    • Porous structures
    • Stone protection layer


    Dive into the research topics of 'Oscillatory Forces on Square Cylinder and Cubes'. Together they form a unique fingerprint.

    Cite this