Vibrations are ubiquitous. In many application scenarios, people use vibration to bring great convenience to our life. For instance in providing power in sensors1, the piezoelectric energy harvesters2, and in inductively coupled electromechanical systems3. However, the ability of a supporting system to...
Acoustic Engineer: An acoustic engineer is a type of engineer whose main function is to deal with sound as well as vibrations that occur in a system. The main responsibility of the acoustic engineer is to control the noise that ...
This paper divides the vibration into periodic and random vibrations according to the different pressures. And a coupling vibration model was established by analyzing the contact relationship between the stent and the trachea tissue. And this study discusses the influence of tracheal diameter, respiratory...
Forced vibration is a phenomenon in which a structure oscillates at a frequency that is not determined by its natural properties, but rather by an external force or input. It is characterized by non-harmonic vibrations that can occur when a crack or delamination is present in the structure. ...
Intensive research efforts have been conducted to develop methods for the prediction of bladed disk vibrations in the presence of friction dampers since the 1970s [4]. In 1980s, Griffin [5] attempted to model the dynamics of blades with underplatform dampers. The prediction of vibratory ...
Vertical-axis wind turbines (VAWTs) are compact and efficient and have become increasingly popular for wind energy harvesting. This paper mainly focuses on free and forced vibration analysis of two different types of VAWTs, i.e., an H-type VAWT and a new
The method is applied successfully in several contexts, although the obtained spectral ratio amplitudes cannot be related to the real amplification (e.g., [24,25,26,27,28]). In the last few years, some works have documented changes through time in the HVSR shape. The ambient vibrations ...
The above-referenced research focused mainly on the analysis of fan geometry and design, air flow characteristics, fan vibrations, noise and fouling as well as on the possibilities for the improvement of fan performance and efficiency. However, the analysis of fan performance, including energy and ...
Only the low-frequency vibrations are determined by inductance L1. There are two high-frequency oscillations. The first high frequency is influenced by the frequency-modulation circuit and the forced-commutation branch. When the parameters in the forced-commutation branch are fixed, dv/dt is ...
Only the low-frequency vibrations are determined by inductance L1. There are two high-frequency oscillations. The first high frequency is influenced by the frequency-modulation circuit and the forced-commutation branch. When the parameters in the forced-commutation branch are fixed, dv/dt is ...