Analysis of vibrations of continuous beams with discrete viscoelastic supports has been established through theoretical modeling and a finite element analysis. The theoretical model is based on the Euler-Bernoulli theory, and the Ritz approach was employed to obtain numerical results from which the attenuation of the beam’s vibration was obtained. In parallel, a finite element analysis was carr...

Title of Thesis: EMBEDDED STRAIN SENSOR WITH POWER SCAVENGING FROM BRIDGE VIBRATION Ming Wang, Master of Science, 2004 Thesis directed by: Professor Peter C. Chang Department of Civil Engineering The Objective of this thesis is to investigate an embedded strain sensor system with power scavenged from highway bridge vibration for structure health monitoring. A power scavenging scheme is develope...

The attenuation of engine vibration transmitted to a chassis has been a major focus in the automotive community for the increase of comfort for the driver and passengers. A hydro-mount system is designed to reduce the transmission of engine vibration to the chassis. It is also used for supporting the static load by an engine weight. In this paper, we present a modeling and parameter estimation ...

Ferroelectric and magnetic transducers are utilized in large number of applications, including nanopositioning, fluid pumps, high-speed milling, and vibration control/suppression. However, the physical mechanisms which make these materials highly effective transducers inherently introduce nonlinear, hysteretic behavior that must be incorporated in models and control designs. This significantly ...

BACKGROUND After the Fukushima Dai-ichi Nuclear Power Station accident in Japan on March 11, 2011, a large number of comments, both positive and negative, were posted on social media. OBJECTIVE The objective of this study was to clarify the characteristics of the trend in the number of tweets posted on Twitter, and to estimate how long public concern regarding the accident continued. We surve...

Mechanoreceptive hair-cells of the vertebrate inner ear have a remarkable sensitivity to displacement, whether excited by sound, whole-body acceleration or substrate-borne vibration. In response to seismic or substrate-borne vibration, thresholds for vestibular afferent fibre activation have been reported in anamniotes (fish and frogs) in the range -120 to -90 dB re 1g. In this article, we demo...

The paper presents the semi-active vibration control based on the Skyhook algorithm which benefits from the adaptively tuned inverse magnetorheological (MR) damper model. The structure of the inverse model consists of the atan function and a linear viscous damping component. The proposed algorithm was tested by simulation of the quarter-car suspension model subjected to multiple bump road excit...

The research performed in the domain of human body vibrations revealed their important influence on human health, being the origin of several professional diseases. Consequently, the vibrations influence can be clearly systematized in two distinct categories: whole body vibrations – with significant effects in the entire human body; vibrations on different sections of the body – that transmit s...

The blasting vibration has an impact on the rock and soil around hole nearby structures. vibration-isolating slot is one of methods to reduce damage vibration. In this paper, influences depth position isolation PPV (peak particle velocity) attenuation characteristics ground damping effect at different measuring points are studied systematically by LS-DYNA numerical models. results show that rea...

the application of energy absorbing systems in the structures are one of the main methods in attenuation of earthquake effects. in this paper, the vibration control of structures by using of tube inversion systems is considered. in this novel system, the energy is dissipated by the inversion of a metal tube. this energy dissipater has large energy absorbing capacity along with constant stiffnes...