Numerical Simulation and Experimental Analysis of an Active Hydraulic Excitation System Based on Pulsating Flow

Kou, Zi Ming; Zhang, Hui Xian; Wu, Juan; Lu, Chun Yue

doi:10.4028/www.scientific.net/amr.295-297.2216

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…If the converter are set as 20Hz, 35Hz, 40Hz and 50Hz , and the system pressure is 3.5MPa.Through the developed program, the simulation results shown Fig. 2 show the excitation pressure at the vibration exciter will rise with the increasing frequency of converter, which indicates that the vibration exciter, serving as excitation source, can generate variable and controllable pressure wave [8]. Fig.…”

Section: Fluid Simulation By Mocmentioning

confidence: 99%

Modeling and Experiment on Active Vibration Control of Hydraulic Excitation System

Zhang

Miao

2012

AMM

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For studying dynamic characteristics of fluid filled pipe under hydraulic excitation force generated actively by a new developed vibration exciter, at first a computer code based on the method of characteristics (MOC) was developed. Then the excitation force calculated by MOC was applied to the corresponding nodes of finite element of pipe, by using Newmark’s method, the dynamic response at every cross section of pipe was obtained. The numerical simulations show that a simple harmonic motion arises at every cross section of the pipe, and the lateral vibration amplitude of every node along the pipe increases as the rising excitation force. In addition, measured data were compared with numerical simulation, which were basically consistent with each other.

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Section: Fluid Simulation By Mocmentioning

confidence: 99%

Modeling and Experiment on Active Vibration Control of Hydraulic Excitation System

Zhang

Miao

2012

AMM

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“…For the sake of researching the vibration performance, Han et al simulated the vibration characteristics of a new electro-hydraulic vibrator by using the AMESim software [17]. Wei et al and Kou et al summarized the law of pressure pulsation [18,19]. However, the studies all above have only focused on the frequency range and stability of the excited system, and ignored the displacement amplitude range.…”

Section: Introductionmentioning

confidence: 99%

Effect of sink flow on dual-valve electro-hydraulic excitation system

Meng¹,

Wu²,

Ni³

2016

J. vibroeng.

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In this study, the main goal is to investigate the displacement gain characteristics of novel dual-valve Electro-Hydraulic Excitation system (EHES). Relative to conventional system, the dual-valve system can improve the amplitude range, but the range is always affected by some nonlinear factors. In order to analysis on the issue, a nonlinear mathematical model of dual-valve EHES is established based on Bernoulli and classical electro-hydraulic servo equation. Then, the results of numerical simulations by using of the MATLAB/Simulink software are compared with experimental results. Simulation and experimental results show that the sink flow mainly influences on the flow dynamic characteristics of dual-valve EHES. Because of that, dual-valve EHES only can improve 50 %-70 % of displacement within 5 to 50 Hz of excitation frequency and 45 %-80 % of displacement amplitude within 20 % to 100 % of command value.

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“…Some studies show that transient flow can produce a low-frequency small-amplitude vibration of hydrocylinder in a certain way. But this vibration system is still a valve-control-cylinder one [3][4][5][6][7] . Liquid in the pressure pipe generates unsteady flow as the pump suddenly stops or valve's opening and closing [8] .…”

Section: Introductionmentioning

confidence: 99%

The vibration controllability of 20# steel pipe excited by unsteady flow

Kou

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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An excited experiment system of 20 # steel pipe was established with oil cylinder, 20 # steel pipe, frequency converter, pump station and wave exciter generating unsteady fl ow artifi cially. The experimental results showed that the 20 # steel pipe could vibrate with the excitation of unsteady fl ows, and the vibration was periodic, instead of a harmonic one. Particles on the front and rear positions of pipe vibrated synchronously, and the vibration intensity of the pipe's two ends was greater than in the middle. System pressure and wave exciter' s frequency had much infl uence upon pipe's amplitude. Pipe's vibration frequency was little affected by system pressure, and its value was close to the wave exciter's. Therefore, the active control of pipe's vibration can be realized by setting system pressure and adjusting frequency converter's frequency.

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Numerical Simulation and Experimental Analysis of an Active Hydraulic Excitation System Based on Pulsating Flow

Cited by 3 publications

References 3 publications

Modeling and Experiment on Active Vibration Control of Hydraulic Excitation System

Modeling and Experiment on Active Vibration Control of Hydraulic Excitation System

Effect of sink flow on dual-valve electro-hydraulic excitation system

The vibration controllability of 20# steel pipe excited by unsteady flow

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