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How the radial gap affects the runner’s hydrodynamic dam** characteristic of a pump-turbine: A physical experiment on a rotating disc
Clarifying how radial gap affects the vibration characteristic of a disc-like structure is of importance in engineering applications, such as in...
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Amplitude–Frequency Characteristics of Magnetically Controlled Hydraulic Bearings with Added Mass
AbstractThe amplitude–frequency characteristic of magnetically controlled hydraulic bearings is considered in the case where a constant magnetic...
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The Effect of Camera Exposure on the Results of Spatial-Frequency Processing and the Quality of the Obtained Amplitude Images
The paper presents the results of experiments which purpose was disclosure the influence of image recording parameters, such as exposure time, on the...
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Anomalous amplitude-frequency dependence in a micromechanical resonator under synchronization
It is well known that the oscillation frequency relates approximately quadratically with amplitude in a Duffing nonlinear oscillator while the...
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Characteristic analysis and design of nonlinear energy sink with cubic dam** considering frequency detuning
The nonlinear energy sink (NES) is a vibration energy absorber, which is of great significance in vibration reduction applications. In this study,...
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Rotorcraft stability analysis using Lyapunov characteristic exponents estimated from multibody dynamics
Stability analysis of complex, nonlinear dynamical systems is a challenge. The use of Lyapunov Characteristic Exponents through a Jacobian-less...
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Site-Specific Amplitude-Distance Laws, Wave Velocities, Dam**, and Transfer Functions of the Soil from Hammer Impacts and Application to Railway-Induced Ground Vibration: Similarities and Mid-Frequency Differences
PurposeThe purpose of this article is to check if and how hammer experiments can be applied to the prediction of railway vibration.
Methods ...
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Research on the Effect of Amplitude-Frequency Fluctuation for Satellite Data Transmission Link
Bit error rate (BER) may get worse, when the received spectrum of signal fluctuates in satellite data transmission system. It has set up three...
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Characteristic analysis of waves through semiconducting medium with multi-phase lags model
The research is associated with characteristic analysis of the reflected waves through visco-elastic medium. The medium selected is having...
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Research on characteristic frequency extraction and sound source identification of electromagnetic noise of medium and low speed maglev train
For the operational noise of a medium-low speed maglev train, this paper proposes a method to achieve sound source identification based on...
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Dynamic modeling and elastic characteristic analysis of the transverse leaf spring suspension
The transverse leaf spring (TLS) suspension has simple structure, convenient installation and low cost. And the suspension stiffness is optimized by...
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Design and characteristic analysis of an X-shaped negative stiffness structure
The quasi-zero stiffness (QZS) mechanism is typically implemented by paralleling negative and positive stiffness structures to enhance the vibration...
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Broadband Antipodal Vivaldi Antenna With Simultaneous Flat Gain and Filtering Characteristic
A broadband antenna with simultaneous flat gain and filtering characteristic is proposed in this paper. To achieve a flat gain response, rectangle...
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The effect of thermal frequency and current amplitude on weldability, microstructural evolution and mechanical properties of AA7075 alloy joint in DP-GMAW process
In this study, the effect of dual-pulsed gas metal arc welding (DP-GMAW) parameters such as thermal frequency and current amplitude on weldability,...
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Frequency capture characteristic of a vibration system driven by four counterrotating unbalanced rotors
This study investigates the frequency capture characteristic of four unbalanced rotors in multi-frequency ranges. First, using the average method,...
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Design Improvement of the Small-Scale Vortex-Induced Bladeless Wind Turbine Considering the Characteristic Length of the Oscillating Structure
In this paper, a modification of the mast, which is the main part of a vortex-induced wind generator was considered in order to improve the...
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Dynamic Characteristic Analysis of the Shield Machine Three-Stage Planetary Reducer Considering Tooth Wear
PurposeIn response to the problem that the third-stage sun gear of the shield machine three-stage planetary reducer is prone to tooth wear and...
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Memristive oscillator to memristive map, energy characteristic
Most of nonlinear oscillators composed of capacitive and inductive variables can obtain the Hamilton energy by using the Helmholtz theorem when the...
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An amplitude-based characteristic parameter extraction algorithm for cerebral edema detection based on electromagnetic induction
BackgroundCerebral edema is a common condition secondary to any type of neurological injury. The early diagnosis and monitoring of cerebral edema is...
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Incipient fault characteristic extraction for gears by using MVMD and IDTW
The fault characteristics of incipient fault gears are relatively weak and easily buried by background noise. Moreover, the characteristics of fault...