We study the problem of capsizing of a rolling ship in harmonic and random beam seas, by means of the Melnikov method and safe basin calculations. In the random excitation case, we consider an integro-differential Cummins-type model equation that takes into account the hydrodynamic memory. The non-linear restoring moment is modeled by a high-order ...
editorial reviewed / In teleost fishes, the swim bladder is an organ filled with gaz that, in addition to providing buoyancy, plays a role in hearing and, in some species, in acoustic communication. Although several studies in different species have demonstrated that the swim bladder has a prominent role in sound production, its function in this pr...
Published in Journal of Physics: Conference Series
A mobile phone application, referred to as SMARTdynamics, was developed to take site readings of the dynamic response of a cable-stayed highway bridge and a three-span plate girder railway bridge by making use of built-in accelerometers. The application allows to determine key dynamic properties including natural frequencies, displacements, and dam...
Brillouin light scattering and microstrip line ferromagnetic resonance were used to investigate the perpendicular magnetic anisotropy (PMA), the magnetic damping and the interfacial Dzyaloshinskii-Moriya interaction (iDMI) in X/Fe(t_Fe)/Y thin films of variable thickness (1.4 nm≤tFe≤10 nm), where X=Pt, Ir or Cu and Y=Ir, Cu or MgO. A particular int...
International audience
Published in Journal of Physics: Conference Series
The inlet rake is generally installed in aero-engine during rig and flight test for flow field pressure and temperature measuring. There are usually complex flow channels and pipelines inside the rake to extract air flow to the sensor. The laser powder bed fusion(L-PBF) technique was applied in rake fabrication recently due to its progressive layer...
Předmětem této práce je útlum mostů. V první části práce jsou shrnuty základy dynamiky stavebních konstrukcí, experimentální zkoušení konstrukcí a problematika útlumu stavebních konstrukcí. Dále je provedena statistická analýza výsledků útlumu mostů na základě dat z experimentů a jsou sestaveny grafy, které prezentují závislost hodnot útlumu na roz...
Three layers film shaped by thermocompression of acrylonitrile butadiene styrene copolymer and polycarbonate have been analyzed in dynamic mechanical thermal analysis in tensile mode. They present two peaks as the film is loaded perpendicularly to the layers and three peaks as the film is loaded in parallel to the layers. Numerical computations con...
In the era of advancing technology, the demand for specialized engineering materials has risen significantly. Active Mechanical Metamaterials (AMMs) offer a novel approach to engineering materials with tunable mechanical properties. This research focuses on developing tunable damping active mechanical metamaterials (AMMs) by incorporating magnetorh...
Silicon nitride is utilized clinically as a bioceramic for spinal fusion cages, owing to its high strength, osteoconductivity, and antibacterial effects. Nevertheless, silicon nitride exhibits suboptimal damping properties, a critical factor in mitigating traumatic bone injuries and fractures. In fact, there is a scarcity of spinal implants that si...
