Design of Passive Defense Structures in Coastal Engineering

D. Isèbe; P. Azérad; F. Bouchette; B. Mohammadi

doi:10.15866/irece.v5i2.2029

Design of Passive Defense Structures in Coastal Engineering

D. Isèbe⁽¹⁾, P. Azérad⁽²⁾, F. Bouchette⁽³⁾, B. Mohammadi^(4*)

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DOI: https://doi.org/10.15866/irece.v5i2.2029

Abstract

This paper aims to show that shape optimization can be efficiently applied to coastal engineering. This is a feasibility study for the design of defense structures for wave attenuation in deep water and against sandy beach erosion. Hence, we consider short wave propagation on a constant depth toward a vertical wall or sea cliff and long wave propagation in a domain with slow but arbitrary depth variations. The governing equations are either based on the Helmholtz wave propagation model or on a parabolic nonlinear refraction/diffraction model in shallow water. In each case, the shape of defense structures is modified in order to minimize a pre-defined cost function taking into account the strength (energy) of the water waves.
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Keywords

Shape Design; Global Optimization; Water Wave Propagation; Scattering; Coastal Engineering; Beach Erosion

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