Active vibration control is investigated for axially moving strings with a tersioner. The tensioner is used as an actuator. The active control law is proposed from the view of the traveling wave propagation. Transverse response of both the uncontrolled and the controlled systems is derived in the frequency domain. The designed controller is numerically tested for the string under impulse and ha...

Compared with thrombus dissolution using only thrombolytic agents, an advanced therapy of direct stirring the blood clot can yield shorter recanalization time and higher velocity. Our previous research presented design a novel micro-stirrer, which convert longitudinal vibration into transverse eventually generate opposite at end-effort, like scissor, for efficient acceleration. Transverse is mo...

In this study, a semi analytical method for transverse and axial vibration of single-walled boron nitride nanotube (SWBNNT) under moving a nanoparticle is presented. The surrounding elastic medium as Pasternak foundation and surface stress effect are included in the formulations of the proposed model. Using Timoshenko beam theory (TBT), Hamilton’s principle and nonlocal piezoelasticity theory, ...

The Delaware Memorial Bridge is a major suspension bridge that is critical to the tri-state region of northern Delaware, southern New Jersey, and southeastern Pennsylvania. The Delaware Memorial Bridge consists of two nearly-identical suspension bridges (hence the nickname “Twin Spans”) that cross the Delaware River from southern New Jersey to northern Delaware. Field ambient vibration measurem...

− This paper addresses technical challenges unresolved in the calibration of angular vibration pickups. Primary and/or comparison calibration systems for angular vibration pickups can not be realised without the angular vibration exciter and the precision angular accelerometer suitable for the transfer standard. Recent attempts made to tackle these technical challenges and related achievements ...

the accuracy and efficiency of the elements proposed by finite element method (fem) considerably depend on the interpolating functions namely shape functions used to formulate the displacement field within the element. in the present study, novel functions, namely basic displacements functions (bdfs), are introduced and exploited for structural analysis of nanobeams using finite element method ...

This work focuses on the dynamical behavior of carbon nanotubes, including vibration, wave propagation and fluid-structure interaction. In the present research, transverse vibration of nano fluid conveying carbon nanotubes is investigated. To this end, based on the nonlocal and strain-inertia gradient continuum elasticity theories and by using rod and Euler-Bernoulli beam models, the system’s d...