In this study, static and dynamic analyses of a spur gear pair with linear tip relief longitudinal crowning were performed. Dynamic experiments conducted to compare verify the analysis results. On basis theory gearing, mathematical model modified was established. addition, finite element mesh generation program developed according model. Finite applied calculate contact stress, patterns, stiffn...

To investigate the contribution of topographically organized brain areas to tactile working memory, we asked human subjects to compare the frequency of two vibrations presented to the same fingertip or to different fingertips. The vibrations ranged from 14 to 24 Hz and were separated by a retention interval of variable length. For intervals <1 sec, subjects were accurate when both vibrations we...

The vibrations produced by trains include two parts which are deterministic and random vibrations. Due to variation of dynamic loads and patterns of load-time, the random vibration of moving train is one of the most important issues in the field of railway engineering. One of the important sources in producing the train vibrations is rail roughness and irregularities. In this paper, responses o...

In this investigation, the material removal rate, tool wear rate and surface integrity obtained by EDM, ultrasonic vibrations assisted EDM and magnetic field assisted EDM were studied and compared with together to show the quality of the effects of applying each of ultrasonic vibrations to tool and magnetic field around gap distance of EDM process on material removal rate, tool wear rate, and s...

in this paper, the nonlinear free vibrations of thin symmetric and non-symmetric cross-ply composite plates subjected to biaxial initial stresses are investigated. because of their excellent properties such as specific strength and specific stiffness, composite plates have wide applications in aerospace and mechanical structures. based on von-karman's strain-displacement relations and using gal...

In the article ‘Illuminating Resolution’ (GEO ExPro Vol. 8, No. 3) we described the evolution of seismic acquisition technologies that aim to achieve the geophysicists’ goals of illumination and resolution. One development featured in the article is the concept of extending the frequency content or bandwidth of seismic signals, especially at the low-frequency end, in order to achieve better ver...

This paper is concerned with the exact controllability of a system that describes small vibrations bar which clamped at one and in other end glued mass. To obtain this system, we will use HUM Method due to Lions [20].

Abstract The propagation of the modulated wave (MW) pattern and its instability in nonlinear medium is an important study from where experimental results are obtained. In this work, we use Schrödinger equation (NLSE) with saturation nonlinearity (SN) which describes solitonic waves molecular chain (MC) model. We set our on effectiveness acoustic longitudinal velocity (ALV) related to vibration ...