We present an embedding technique for metallic systems that makes it possible to model energy dissipation into substrate phonons during surface chemical reactions from first principles. The separation of chemical and elastic contributions to the interaction potential provides a quantitative description of both electronic and phononic band structure. Application to the dissociation of O2 at Pd(1...

The vibration dissipation mechanism of the rotating blade with a dovetail joint is studied in this paper. Dry friction damping plays an indispensable role direction reduction. level reduced by consuming total energy turbine dry device on blade-root reduction revealed variation force and ratio friction. In paper, flexible interface feature discretized using spatial beam element based finite theo...

Abstract The cubic or third-power (TP) nonlinear energy sink (NES) has been proven to be an effective method for vibration suppression, owing the occurrence of targeted transfer (TET). However, TET is unable triggered by low initial input, and thus TP NES would get failed under low-amplitude vibration. To resolve this issue, a new type with fractional nonlinearity, e.g., one-third-power (OTP) p...

It is well known that most important problems faced by many industrial machine parts are the wear and tear which increases the cost of production and wasted time for the replacement process. Now-a-days cryogenic treatment would be regarded as one of the most important processes in the field of industries, and it is the ultra modern type of processing to make the metals more resistant to wear an...

Vertical convection (VC) under the action of vertical vibration in a square cavity has been investigated using direct numerical simulation. The simulations are conducted with Prandtl number Pr fixed at 4.38 and Rayleigh Ra ranging from [Formula: see text] to text]. To examine influence vibration, dimensionless frequency is varied range small amplitude First, for low frequency, trivial results o...

This paper presents design recommendations for optimal seismic response control of damped braced tube system with focus on cost performance introducing energy-dissipation devices. According to the results, 1) structure should be designed so that coupled-shear-wall-like vibration modes are predominant obtain highly damping ratio and better dampers, 2) oil damper introduced ratio, 3) BRB has good...

Work in our laboratory has been directed at the development of a new class of instrumentation that can directly measure ambient aerosol absorption through photothermal interferometry. The hallmark of this approach is its ability to directly measure aerosol absorption without interference from aerosol scattering since the signal originates from the thermal dissipation of the spectrally absorbed ...

A method for the most efficient removal of heat, through an anisotropic composite, is proposed. It is shown that a rational placement of constituent materials, in the radial and the azimuthal directions, at a given point in the composite yields a uniform temperature distribution in spherical diffusers. Such arrangement is accompanied by a very significant reduction of the source temperature, in...

The aim of this research is to introduce a semi-analytical approach for the analysis free and forced nonlinear vibrations bending shape memory alloy (SMA) beam; while, considering effect its pseudo-elastic behavior. In order create primary deflection, an appropriate pre-strain applied SMA beam using compression spring. A new material model was utilized simulate hysteric behavior beam, while dif...