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Design considerations and experimental studies on semi-active smart pin joint
Yancheng LI, Jianchun LI, Bijan SAMALI, Jiong WANG,
《机械工程前沿(英文)》 2009年 第4卷 第4期 页码 363-370 doi: 10.1007/s11465-009-0074-1
关键词: magnetorheological (MR) fluids smart pin joint design consideration
Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline
Yongqing SU, Yikuan SONG, Jiguang YUE
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 339-344 doi: 10.1007/s11465-009-0048-3
关键词: Magneto-rheological fluids (MRF) micro-pipeline coupled model multi-physics simulation
Variable stiffness and damping magnetorheological isolator
Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 310-315 doi: 10.1007/s11465-009-0039-4
关键词: magnetorheological (MR) fluid stiffness damping mathematical model dynamic performance parameter identification
Weilian QU, Jianwei TU
《结构与土木工程前沿(英文)》 2009年 第3卷 第1期 页码 32-41 doi: 10.1007/s11709-009-0003-8
关键词: Three-Gorges ship lift tower whipping effect magnetorheological (MR) intelligent isolation system neural network sliding steel supporting
Study on damping properties of magnetorheological damper
ZHOU Yu-feng, CHEN Hua-ling
《机械工程前沿(英文)》 2006年 第1卷 第4期 页码 452-455 doi: 10.1007/s11465-006-0057-4
关键词: nonlinear hysteretic force-velocity unsolved excitation magnetorheological
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 15-33 doi: 10.1007/s11465-014-0283-0
Magnetorheological (MR) pin joint is a novel device in which its joint moment resistance can be controlled in real-time by altering the applied magnetic field. The smart pin joint is intended to be used as a controllable connector between the columns and beams of a civil structure to instantaneously shift the structural natural frequencies in order to avoid resonance and therefore to reduce unwanted vibrations and hence prevent structural damage. As an intrinsically nonlinear device, modelling of this MR fluid based device is a challenging task and makes the design of a suitable control algorithm a cumbersome situation. Aimed at its application in civil structure, the main purpose of this paper is to test and characterise the hysteretic behaviour of MR pin joint. A test scheme is designed to obtain the dynamic performance of MR pin joint in the dominant earthquake frequency range. Some unique phenomena different from those of MR damper are observed through the experimental testing. A computationally-efficient model is proposed by introducing a hyperbolic element to accurately reproduce its dynamic behaviour and to further facilitate the design of a suitable control algorithm. Comprehensive investigations on the model accuracy and dependences of the proposed model on loading condition (frequency and amplitude) and input current level are reported in the last section of this paper.
关键词: Magnetorheological pin joint hyperbolic hysteresis model experimental testing frequency dependence
Creep and recovery behaviors of magnetorheological elastomers
Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 341-346 doi: 10.1007/s11465-010-0096-8
关键词: magneto-rheological elastomers (MREs) creep recovery linear viscoelastic model
Danxia ZHAO, Changrong LIAO, Qiong LIU, Jing LUO
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 312-317 doi: 10.1007/s11465-011-0235-x
In this paper, a small displacement-type magnetorheological grease (MRG) damper based on disk squeeze mode is proposed. The squeeze flow differential equation is obtained. The Navier slip condition is considered on the surfaces and the boundary compatible condition is established. The radial velocity profiles and the radial pressure distributions are derived respectively, and the mathematical stress expression is calculated. To verify rationality of analytical method, the MRG damper is designed and fabricated according to the technical requirements of an engine vibration isolation system. The experimental damping force from MTS870 Electro-hydraulic Servo with sine wave excitation shows that the proposed analytical method is feasible and provides the reference value for designing MRG damper based on disk squeeze mode.
YANG Menggang, HU Jianhua
《结构与土木工程前沿(英文)》 2008年 第2卷 第1期 页码 43-48 doi: 10.1007/s11709-008-0011-0
关键词: longitudinal displacement corresponding computer excitation phenomenological self-anchored suspension
Seismic response reduction of a three-story building by an MR grease damper
Tomoki SAKURAI, Shin MORISHITA
《机械工程前沿(英文)》 2017年 第12卷 第2期 页码 224-233 doi: 10.1007/s11465-017-0413-6
This paper describes an application of magneto-rheological (MR) grease dampers as seismic dampers for a three-story steel structure. MR fluid is widely known as a smart material with rheological properties that can be varied by magnetic field strength. This material has been applied to various types of devices, such as dampers, clutches, and engine mounts. However, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval because of the density difference between the particles and their carrier fluid. To overcome this defect, we developed a new type of controllable working fluid using grease as the carrier of magnetic particles. MR grease was introduced into a cylindrical damper, and the seismic performance of the damper was subsequently studied via numerical analysis. The 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.
关键词: MR grease damper seismic damper vibration control structural response FEM analysis
Semi-active fuzzy control of Lali Cable-Stayed Bridge using MR dampers under seismic excitation
Sajad JAVADINASAB HORMOZABAD, Amir K. GHORBANI-TANHA
《结构与土木工程前沿(英文)》 2020年 第14卷 第3期 页码 706-721 doi: 10.1007/s11709-020-0612-9
关键词: semi-active control Fuzzy Control Algorithm cable-stayed bridge MR damper Lali Bridge
An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal
Qi WEI, Xiaohui ZHANG
《能源前沿(英文)》 2010年 第4卷 第4期 页码 507-516 doi: 10.1007/s11708-010-0017-x
关键词: thermal convection porous media viscoelastic fluid thermal nonequilibrium model
Combined static mixers for high viscous fluids mixing
Zhenhao XI, Weizhen SUN, Ling ZHAO, Zhaoyan LIU
《化学科学与工程前沿(英文)》 2009年 第3卷 第1期 页码 93-96 doi: 10.1007/s11705-009-0112-x
关键词: static mixer Cross-over-Disc pressure drop mixing performance high viscous fluid
Vibration control of a structure using Magneto-Rheological grease damper
Shinya SUGIYAMA, Tomoki SAKURAI, Shin MORISHITA
《机械工程前沿(英文)》 2013年 第8卷 第3期 页码 261-267 doi: 10.1007/s11465-013-0268-4
This paper describes an application study of Magneto-Rheological (MR) grease damper to a structure with three stories. MR fluid is known as one of successful smart materials whose rheological properties can be varied by magnetic field strength, and has been applied to various kinds of device such as dampers, clutches, engine mounts, etc. However, ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval due to the density difference between the particles and their career fluid. To overcome this defect, we have developed a new type of controllable working fluid using grease as the career of magnetic particles. Network of thickener in grease is expected to hold the magnetic particles and prevent them from settled down. No or little sedimentation was observed in MR grease whose characteristics could be controlled by the magnetic field strength. MR grease was introduced into a cylindrical damper and its performance was studied. As a result, it was confirmed that the damping force of MR grease damper could be controlled by the applied electric current to the coil in the cylinder of damper. Furthermore, vibration response of a three-story model structure equipped with MR grease damper was investigated experimentally, and it was shown that MR grease damper worked effectively as a semi-active damper.
关键词: vibration control damper smart material Magneto-Rheological (MR) grease MR fluid
朱伟,马履中,陈修祥,吴伟光,谢俊
《中国工程科学》 2007年 第9卷 第11期 页码 63-67
分析了磁流变阻尼器的力学特性,将其应用于多维减振系统中。采用经典的三平移并联机构作为多维减振平台的主体机构,推导出其位置逆解公式;建立了系统动力学状态方程模型,以运动学方程得到的支路加速度作为输入信号,控制器采用了基于线性二次型最优控制理论的半主动控制算法。考虑到动态过程中机构动力学方程的复杂性,采用稳态方法对并联机构处于某一运动姿态的支路移动副振动进行控制,从而控制了整个平台的振动。仿真结果表明,所采取的控制算法有较好的控制效果。
标题 作者 时间 类型 操作
Design considerations and experimental studies on semi-active smart pin joint
Yancheng LI, Jianchun LI, Bijan SAMALI, Jiong WANG,
期刊论文
Analysis and experiment of controllability of magnetorheological fluids based on micro-pipeline
Yongqing SU, Yikuan SONG, Jiguang YUE
期刊论文
Variable stiffness and damping magnetorheological isolator
Yang ZHOU, Xingyu WANG, Xianzhou ZHANG, Weihua LI
期刊论文
Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheological
Weilian QU, Jianwei TU
期刊论文
Dynamic characteristics of a magnetorheological pin joint for civil structures
Yancheng LI,Jianchun LI
期刊论文
Creep and recovery behaviors of magnetorheological elastomers
Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,
期刊论文
Analytical study on damping performances of magnetorheological grease damper based on disk squeeze mode
Danxia ZHAO, Changrong LIAO, Qiong LIU, Jing LUO
期刊论文
Investigations concerning seismic response control of self-anchored suspension bridge with MR dampers
YANG Menggang, HU Jianhua
期刊论文
Seismic response reduction of a three-story building by an MR grease damper
Tomoki SAKURAI, Shin MORISHITA
期刊论文
Semi-active fuzzy control of Lali Cable-Stayed Bridge using MR dampers under seismic excitation
Sajad JAVADINASAB HORMOZABAD, Amir K. GHORBANI-TANHA
期刊论文
An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal
Qi WEI, Xiaohui ZHANG
期刊论文
Combined static mixers for high viscous fluids mixing
Zhenhao XI, Weizhen SUN, Ling ZHAO, Zhaoyan LIU
期刊论文
Vibration control of a structure using Magneto-Rheological grease damper
Shinya SUGIYAMA, Tomoki SAKURAI, Shin MORISHITA
期刊论文