2025年3月1日 · The design of hexagonal grating structures often involves mathematical equations related to diffraction and wave propagation. These equations can describe how the grating interacts with acoustic waves. Mathematical formulations, such as the Fresnel-Kirchhoff diffraction integral, can be used to model the diffraction of acoustic waves by the ...

2008年2月1日 · In an attempt to model the interaction of extreme ocean waves with offshore structures, the diffraction analysis is now extended to model the effect of incident NewWaves. Studying the diffraction of NewWaves will provide insight into whether real ocean waves can excite near-trapped responses.

1990年11月1日 · Two variational methods and an eigenfunction expansion method are used to determine the reflection coefficients for waves with wavelengths longer than the distance from gap to gap in the breakwater array. The eigenfunction method is also used for breakwaters, where the spacing between the gaps is longer than the water wavelength.

2019年5月13日 · Based on the diffraction effects of phase gratings, we demonstrate a broadband acoustic metagrating which can concentrate the diffracted waves in the first (±1) orders and achieve...

2022年12月1日 · Broad band wavelength waves blocked by the multiple vertical cylinders designed by combination grating theories. A novel waveguide type breakwater has been developed based on wave space modulation and grating control technologies.

wave energy impinging on beaches. Many are often constructed in a single straight line parallel to the coast, separated by gaps, which permit some wave action and water exchange to exist. This paper examines the propa-gation of the waves through these periodic gaps and …

2025年3月5日 · Diffraction gratings, with their unique capability to split light and shift phase, serve as essential beam-modulating components across diverse fields, such as laser modulation 1,2, spectral ...

2006年10月1日 · In practice this process could be achieved by bombarding the ocean with explosive material in vicinity of tsunami region from the earth or from airplane. The tsunami velocity could be decreased...

1993年11月1日 · The diffraction of water waves by an offshore breakwater consisting of an infinite row of equally spaced vertical screens is investigated theoretically. A Green's function approach is utilized and the use of geometric periodicity reduces the problem to that of a singular integral equation for the potential difference across a single screen element.

1990年11月1日 · Two variational methods and an eigenfunction expansion method are used to determine the reflection coefficients for waves with wavelengths longer than the distance from gap to gap in the...