Flow-induced vibration (FIV) is concerned in a broad range of engineering applications due to its resultant fatigue damage structures. Nevertheless, such fluid-structure coupling process continuously extracts the kinetic energy from ambient fluid flow, presenting conversion potential mechanical electricity. As air and water flows are widely encountered nature, piezoelectric harvesters show adva...

We examined the left ventricular functional response to externally applied vibration using four canine open chest preparations. A sinusoidal 30 Hz vibration (2.7 mm in amplitude) was applied to the ventricular epicardium at each level of propranolol-induced myocardial depression. External vibration in control conditions induced no significant change either in peak left ventricular pressure (LVP...

BACKGROUND Whole-body vibration (WBV) induces reflex muscle activity and leads to increased muscle strength. However, little is known about the physiological mechanisms underlying the effects of whole-body vibration on muscular performance. Tonic vibration reflex is the most commonly cited mechanism to explain the effects of whole-body vibration on muscular performance, although there is no con...

The vibrations in hydraulic pipeline systems inevitably involve the interaction between two-phase media of a solid and fluid. fluid flowing generates pressure on wall thus causes vibration deformation pipeline, which turn changes flow condition, thereby cyclically affecting motion making system vulnerable to damage. Therefore, it is great theoretical practical value investigate behavior charact...

Seismic analysis model is required to evaluate themechanical structural integrity of reactor internals when earthquakeis occurred. Finite element method is used to prepare a seismicanalysis model for reactor internals. The reactor internals arecomplex mechanical structures, so much analysis time is requiredto obtain the seismic responses with the detail finite element model....

In this paper, the 14-equations of pipeline system were written as matrix forms in frequency domain with Laplace transformation and further solved by transfer method (TMM). Moreover, added mass damping models established combined TMM for decoupling investigated Turbulence-Induced Vibration (TIV) clamped-clamped pipe system. Firstly, feasibility analyzing responses water-filled pipelines free su...

In this paper, the flow-induced vibration and flutter instability of cantilever carbon nanotubes conveying fluid and modeled as a thin-walled Timoshenko beam are investigated. Analytically nonlocal theory, transverse shear and rotary inertia effects are incorporated in this study. The governing equations and the boundary conditions are derived through Hamilton's principle. Numerical analysis is...