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Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheologicalintelligent isolation system and its key technique

Weilian QU, Jianwei TU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 32-41 doi: 10.1007/s11709-009-0003-8

Abstract: This paper proposes a roof magnetorheological (MR) intelligent isolation system to prevent the seismicintelligent isolation system was installed was deduced.intelligent isolation system controlling the whipping effect was carried out and the results of theinverse neural network control strategy and passive isolation strategy were compared.It was proven that the MR intelligent isolation system with proper control strategy can greatly reduce

Keywords： Three-Gorges ship lift tower whipping effect magnetorheological (MR) intelligent isolation system neural

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Variable stiffness and damping magnetorheological isolator

Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3, Pages 310-315 doi: 10.1007/s11465-009-0039-4

Abstract: This paper presents the development and characterization of a magnetorheological (MR) fluid-based variableThe prototype of the MR fluid isolator is fabricated, and its dynamic behavior is measured under variousExperimental results indicate that both the stiffness and damping capability of the developed MR isolator

Keywords： magnetorheological (MR) fluid stiffness damping mathematical model dynamic performance parameter identification

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H_∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3, Pages 264-275 doi: 10.1007/s11709-013-0214-x

Abstract: A floor isolation system installed in a single floor or room in a fixed base structure is designed toThe floor isolation system should minimize the acceleration to protect equipment; however, displacementSemi-active control with an control was adopted for the floor isolation system and a new input shapingA series of shake table tests for a semi-active floor isolation system using rolling pendulum isolatorssystem.

Keywords： semi-active floor isolation H_∞ control MR damper shaping filter shaking table

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Design considerations and experimental studies on semi-active smart pin joint

Yancheng LI, Jianchun LI, Bijan SAMALI, Jiong WANG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4, Pages 363-370 doi: 10.1007/s11465-009-0074-1

Abstract: An intelligent structural system equipped with smart structural members that are controllable in real-timeCivil intelligent structures with controllable properties to adapt to any changes due to dynamic loadingsIn this paper, design and testing of a semi-active magnetorheological (MR) pin joint, in which the momentreported with the view of using it as a potential candidate for smart members in the development of intelligentpin joints includes theoretical analysis related to the radius of the rotary plate, the property of MR

Keywords： magnetorheological (MR) fluids smart pin joint design consideration

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Study on damping properties of magnetorheological damper

ZHOU Yu-feng, CHEN Hua-ling

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4, Pages 452-455 doi: 10.1007/s11465-006-0057-4

Abstract: To research the properties of a new kind of smart controllable MR (magnetorheological) fluid, in thisOn the basis of analyzing the structural forms of MR dampers, an improved structure of the MR damperis introduced; the properties of the novel MR damper are then tested.model predicts the force-velocity well; the damping properties of the ameliorated structure of the MRat high velocity; and when the excitation is a sinusoidal signal, the MR damper reveals a nonlinear

Keywords： nonlinear hysteretic force-velocity unsolved excitation magnetorheological

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Dynamic characteristics of a magnetorheological pin joint for civil structures

Yancheng LI,Jianchun LI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1, Pages 15-33 doi: 10.1007/s11465-014-0283-0

Abstract:

Magnetorheological (MR) pin joint is a novel device in which its joint moment resistance can be controlledAs an intrinsically nonlinear device, modelling of this MR fluid based device is a challenging task andcivil structure, the main purpose of this paper is to test and characterise the hysteretic behaviour of MRA test scheme is designed to obtain the dynamic performance of MR pin joint in the dominant earthquakeSome unique phenomena different from those of MR damper are observed through the experimental testing

Keywords： Magnetorheological pin joint hyperbolic hysteresis model experimental testing frequency dependence

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Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 341-346 doi: 10.1007/s11465-010-0096-8

Abstract: This paper presents experimental and modeling study of creep and recovery behaviors of magneto-rheological elastomers (MREs) under constant stresses. Experimental study was accomplished using a rheometer with parallel-plate geometry. Under constant stresses ranging from a small value to a large one, the resultant strains were recorded. The experimental results demonstrated that MREs behave as linear visocleastic properties. The effects of the magnetic field and stress on MRE creep behaviors were discussed. Moreover, a four-parameter viscoelastic model was developed to describe MRE creep behaviors. The comparison between the experimental results and the modeling predictions indicates that the model can predict MRE creep behaviors very well.

Keywords： magneto-rheological elastomers (MREs) creep recovery linear viscoelastic model

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Analytical study on damping performances of magnetorheological grease damper based on disk squeeze mode

Danxia ZHAO, Changrong LIAO, Qiong LIU, Jing LUO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 312-317 doi: 10.1007/s11465-011-0235-x

Abstract:

In this paper, a small displacement-type magnetorheological grease (MRG) damper based on disk squeezeMRG damper is designed and fabricated according to the technical requirements of an engine vibration isolationsystem.

Keywords： magnetorheological grease (MRG) damper squeeze model

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Investigations concerning seismic response control of self-anchored suspension bridge with MR dampers

YANG Menggang, HU Jianhua

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1, Pages 43-48 doi: 10.1007/s11709-008-0011-0

Abstract: the seismic response of self-anchored suspension bridges, equations of motion governing the coupled systemof bridge- magneto-rheological (MR) dampers subject to seismic excitation are formulated by employingthe phenomenological model of MR dampers.displacement of the tower top and bridge girder decrease with the increase in input current and number of MR

Keywords： longitudinal displacement corresponding computer excitation phenomenological self-anchored suspension

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Seismic response reduction of a three-story building by an MR grease damper

Tomoki SAKURAI, Shin MORISHITA

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2, Pages 224-233 doi: 10.1007/s11465-017-0413-6

Abstract:

This paper describes an application of magneto-rheological (MR) grease dampers as seismic dampersMR fluid is widely known as a smart material with rheological properties that can be varied by magneticHowever, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certainThe analysis results of the MR grease damper were compared with those of other seismic dampers.We confirmed that the MR grease damper is an effective seismic damper.

Keywords： MR grease damper seismic damper vibration control structural response FEM analysis

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Semi-active fuzzy control of Lali Cable-Stayed Bridge using MR dampers under seismic excitation

Sajad JAVADINASAB HORMOZABAD, Amir K. GHORBANI-TANHA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 706-721 doi: 10.1007/s11709-020-0612-9

Abstract: The performance of fuzzy control systems is also compared with a sky-hook and a passive-on system.

Keywords： semi-active control Fuzzy Control Algorithm cable-stayed bridge MR damper Lali Bridge

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Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline

Yongqing SU, Yikuan SONG, Jiguang YUE

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3, Pages 339-344 doi: 10.1007/s11465-009-0048-3

Abstract: The controllability of the magneto-rheological fluid (MRF) flowing through a micro-pipeline is analyzed. The coupled formulas for MRF are deduced by analyzing the property of the flow field and magnetic field. Then, the relationship between the flow speed of MRF and the special shear stress under the effect of the magnetic field is founded. The model of the MRF and micro-pipeline is established by using multi-physics software of Comsol, the curve of - in an ideal condition is attained by modifying parameters, and by adding the boundary condition of the model. This paper provides a theoretical proof of the controllability of MRF flowing through the micro-pipeline and explores MRF’s application on the micro-drive and control field.

Keywords： Magneto-rheological fluids (MRF) micro-pipeline coupled model multi-physics simulation

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Intelligent fault diagnostic system based on RBR for the gearbox of rolling mills

Lixin GAO, Lijuan WU, Yan WANG, Houpei WEI, Hui YE

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4, Pages 483-490 doi: 10.1007/s11465-010-0118-6

Abstract: This paper presents an intelligent system that is necessary for diagnostic accuracy and efficiency inA rule-based reseaning (RBR) intelligent diagnostic system has been developed based on many successfulIts application results prove that the usability of the system is good and it will increasingly attain

Keywords： rule-based reasoning fault diagnosis intelligent system gear box

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Vibration control of a structure using Magneto-Rheological grease damper

Shinya SUGIYAMA, Tomoki SAKURAI, Shin MORISHITA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3, Pages 261-267 doi: 10.1007/s11465-013-0268-4

Abstract:

This paper describes an application study of Magneto-Rheological (MR) grease damper to a structureMR fluid is known as one of successful smart materials whose rheological properties can be varied byNo or little sedimentation was observed in MR grease whose characteristics could be controlled by theMR grease was introduced into a cylindrical damper and its performance was studied.experimentally, and it was shown that MR grease damper worked effectively as a semi-active damper.

Keywords： vibration control damper smart material Magneto-Rheological (MR) grease MR fluid

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Study on Semi-active Control of Multi-dim Damping Platform Based on Parallel Mechanism and MR Damper

Zhu Wei,Ma Lüzhong,Chen Xiuxiang,Wu Weiguang,Xie Jun

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 63-67

Abstract:

MR damper is analyzed on its mechanical characteristic, and is applied

Keywords： parallel mechanism multi-dim damping MR damper semi-active control

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Title Author Date Type Operation

Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheologicalintelligent isolation system and its key technique

Weilian QU, Jianwei TU

Journal Article

Variable stiffness and damping magnetorheological isolator

Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI

Journal Article

H_∞ control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Journal Article

Design considerations and experimental studies on semi-active smart pin joint

Yancheng LI, Jianchun LI, Bijan SAMALI, Jiong WANG,

Journal Article

Study on damping properties of magnetorheological damper