We describe results concerning the existence proofs of Discrete Breathers (DBs) in the two classes of dynamical systems with optical linear phonons and with acoustic linear phonons. A standard approach is by continuation of DBs from an anticontinuous limit. A new approach, which is purely variational, is presented. We also review some numerical results on intraband DBs in random nonlinear syste...

The paper studies stochastic dynamics of a two-degree-of-freedom system, where primary linear system is connected to nonlinear energy sink with cubic stiffness nonlinearity and viscous damping. While the mass subjected zero-mean Gaussian white noise excitation, main objective this study maximise efficiency targeted transfer in system. A surrogate optimisation algorithm proposed for purpose adop...

The nonlinear energy sink (NES), which is proven to perform rapid and passive targeted transfer (TET), has been employed for vibration mitigation in many primary small- large-scale structures. Recently, the feature of bistability, two nontrivial stable equilibria one trivial unstable equilibrium exist, utilized TET what known as bistable NES (BNES). BNES generates a force that incorporates nega...

The effect of gravity and sliding friction on the dynamics around targeted energy transfer an inclined vibro-impact nonlinear sink (VINES) is addressed. non-smooth first formulated in Signorini’s contact law treated using a Moreau-Jean scheme adapted with energy-conserving integration method. Exhaustive discussions are then carried out regarding vibration damping performance VINES, as well thei...

nanofluid is a new class of heat transfer fluids engineered by dispersing metallic or non-metallic nanoparticles with a typical size of less than 100 nm in the conventional heat transfer fluids.this article aims to investigate the overall and convection heat transfer coefficient and nusselt number of al2o3-water nanofluid flowing in a horizontal double pipe heat exchanger under turbulent flow (...

Nanofluid is a new class of heat transfer fluids engineered by dispersing metallic or non-metallic nanoparticles with a typical size of less than 100 nm in the conventional heat transfer fluids.This article aims to investigate the overall and convection heat transfer coefficient and Nusselt number of Al2O3-water nanofluid flowing in a horizontal double pipe heat exchanger under turbulent flow (...