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Listar por palabra clave "Cylinders"

Mostrando ítems 1-7 de 7

Anisotropic mass density by two-dimensional acoustic metamaterials

Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (IOP Publishing: Open Access Journals, 2008-02-06)

We show that specially designed two-dimensional arrangements of full elastic cylinders embedded in a nonviscous fluid or gas define ( in the homogenization limit) a new class of acoustic metamaterials characterized by a ...
Cylinders with a steel-concrete-steel wall to resist external pressure

Goode, Charles; Nash, Tom (Editorial Universitat Politècnica de València, 2018-06-05)

[EN] In the 1980’s Manchester University carried out over 110 tests on cylinders with a composite wall (steel-concrete-steel) subjected to external pressure as already reported in the literature. This paper describes ...
Investigación de modelos de pérdidas de calor y fricción para el diseño preliminar de novedosos motores de pistón en aeronaves

Gil Merino, Alejandro (Universitat Politècnica de València, 2020-05-13)

[ES] Este trabajo fin de máster realizado en Stuttgart forma parte de un proyecto de investigación sobre motores de pistón en la aeronáutica. Como el título dice, este trabajo se ha focalizado en los modelos de pérdidas ...
Multi-resonant scatterers in sonic crystals: Locally multi-resonant acoustic metamaterial

Romero García, Vicente; Krynkin, A.; García-Raffi, L. M.; Umnova, O.; Sánchez Pérez, Juan Vicente (Elsevier, 2013-01-07)

An acoustic metamaterial made of a two-dimensional (2D) periodic array of multi-resonant acoustic scatterers is analyzed both experimentally and theoretically. The building blocks consist of a combination of elastic beams ...
One-Dimensional Modeling of Mechanical and Friction Losses Distribution in a Four-Stroke Internal Combustion Engine

Tormos, B.; Martín, Jaime; Blanco-Cavero, Diego; Jiménez-Reyes, Antonio José (ASME International, 2020)

[EN] As the road transport accounts between 15%-18% of worldwide CO2 emissions, the automotive sector has a deep commitment to mitigate global warming. Consequently, stricter regulations have been adopted by the European ...
Optimum control of broadband noise by arrays of cylindrical units made of a recycled material

García Chocano, Víctor Manuel; Sánchez-Dehesa Moreno-Cid, José (Elsevier, 2013-01)

[EN] We report acoustic barriers that are designed to attenuate efficiently broadband noise. The barriers are structures consisting of only three layers of cylindrical units containing rubber crumb, a sound absorbing ...
Theoretical and experimental evidence of level repulsion states and evanescent modes in sonic crystal stubbed waveguides

Romero García, Vicente; VASSEUR, J.O; García-Raffi, L. M.; Hladky-Hennion, A.C. (IOP Publishing: Open Access Journals, 2012-02)

The complex band structures calculated using the extended plane wave expansion (EPWE) reveal the presence of evanescent modes in periodic systems, never predicted by the classical ω(kE) methods, providing novel interpretations ...