V avtomobilski industriji se dandanes precej pozornosti namenja tako analizi izvora kot tudi obvladovanju akustičnega hrupa. V uvodnem delu se osredotočim na ozadje te tematike in predstavim, kako je prišlo do zahtev po dodatnem razumevanju vpliva močnostnega pretvornika na akustični hrup motorja. Sledi opis modeliranja električnega pogonskega sist...
Published in Journal of Vibroengineering
The methods of arranging frame spacing are explored for reducing the vibration of a cylindrical shell. According to the principle that an aperiodic structures will produce irregular reflections on structural waves, resulting in structural vibration attenuation, two methods of arranging frame spacing are adopted: periodic frame spacing and random fr...
Published in Journal of Physics A: Mathematical and Theoretical
We examine the impacts of time-delay and phase shift between two acoustic driving forces on vibrational resonance (VR) phenomena in the oscillations of a spherical gas bubble. Using the approximate method of direct separation of the motions, we obtain the equation of slow motion and the response amplitude, and we validate the theoretical prediction...
Published in Australian endodontic journal : the journal of the Australian Society of Endodontology Inc
This study evaluated the perceived vibration, noise and discomfort levels associated with two nickel-titanium file systems with different kinetics; reciprocating motion (REC) using WaveOne Gold and continuous rotation motion (CON) using ProTaper NEXT. Forty roots with two canals from maxillary premolar and molar of 40 patients were included. Root c...
Published in Journal of Physics: Conference Series
Structure design is a mixture of art and science, combining the experienced engineer’s intuitive feeling of statics and material. In the engineering practice, it is not exact enough to design a structure only by considering the constant loading. Time-varying loading such as earth-quake, wind loading, bomb blast loading, vortex should be taken into ...
Published in Vibroengineering PROCEDIA
Through the practice of a highway pavement overhaul project, the feasibility of the old concrete pavement recycling scheme in terms of technology, economy and sustainable development is analyzed. The dynamic characteristics of concrete pavement were tested. The results show that crushing the old concrete panels into recycled aggregates and then re-...
Published in Comparative Exercise Physiology
Delayed onset muscle soreness (DOMS) is a condition that happens following eccentric or intensive exercises. Whole-body vibration (WBV) is a potential treatment for DOMS; however, there is a lack of studies assessing its effectiveness in the untrained population. Our study objective was to test the efficacy of WBV compared with no treatment on pain...
Published in Journal of Vibroengineering
The load that borne by ship mining system is very complex. The vibration of lifting pipe can be significantly affected by ocean current and wind load, which has a key impact on material lifting, ore bin storage and ship towing. Considering the composite load condition, the vibration control equation of mining ship is established based on the transv...
Published in Frontiers in Mechanical Engineering
Metamaterials have recently emerged and shown great potential for noise and vibration reduction in specific frequency ranges, called stop bands. To predict stop bands, their often periodic nature is exploited and dispersion curves are calculated based on a single representative unit cell, typically modeled using the finite element method. Since the...
Published in MATEC Web of Conferences
The paper deals with evaluation of experimental data obtained from the real-size 30 MW output Waste to Energy steam turbine. For many turbine regimes pressures in the last stage area were obtained. At the same time amplitudes of blade tips vibrations were measured of last rotor blades using the blade tip timing system and axial velocity of the stea...
