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Wind-induced vibration control of Hefei TV tower with fluid viscous damper

Zhiqiang ZHANG , Aiqun LI , Jianping HE , Jianlei WANG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 249-254 doi: 10.1007/s11709-009-0038-x

Abstract: The Hefei TV tower is taken as an analytical case to examine the control method with a fluid viscousdamper under wind load fluctuation.Finally, a dynamic model is proposed to study the wind-induced vibration control analysis using viscousfluid dampers, and the optimal damping coefficient is obtained regarding the wind-induced response ofviscous damper, and the peak acceleration responses of the upper turret is reduced by 43.4%.

Keywords： high-rise structure wind-induced response fluid viscous damper vibration control

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Evaluation of a developed bypass viscous damper performance

Mahrad FAHIMINIA, Aydin SHISHEGARAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 773-791 doi: 10.1007/s11709-020-0627-2

Abstract: In this study, the dynamic behavior of a developed bypass viscous damper is evaluated.Bypass viscous damper has a flexible hose as an external orifice through which the inside fluid transferMoreover, the external orifice acts as a thermal compensator and alleviates viscous heating of the damperAccording to experimental results, Computational Fluid Dynamic (CFD) model, a numerical formula and theNonlinear time history analyses revealed that the hospital with viscous damper experiences less structural

Keywords： developed viscous damper external orifice energy dissipation seismic behavior CFD model of viscous damper

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Seismic performance of steel MRF building with nonlinear viscous dampers

Baiping DONG,James M. RICLES,Richard SAUSE

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3, Pages 254-271 doi: 10.1007/s11709-016-0348-8

Abstract: consisting of a moment resisting frame (MRF) with reduced beam sections (RBS), and a frame with nonlinear viscousThe DBF with nonlinear viscous dampers was designed to control the lateral drift demands.

Keywords： seismic response steel MRF nonlinear viscous damper design basis earthquake real-time hybrid simulation

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Combined static mixers for high viscous fluids mixing

Zhenhao XI, Weizhen SUN, Ling ZHAO, Zhaoyan LIU

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1, Pages 93-96 doi: 10.1007/s11705-009-0112-x

Abstract: A new static mixer Cross-over-Disc has been invented to strip off the boundary layer and to make strong radial mixing. The pressure drop of Cross-over-Disc is 12—26 times as large as that of empty pipe with equivalent diameter and length. The mixing performance of Cross-over-Disc with 14 elements has been investigated in the viscosity range of 190—250 Pa?s by decoloration method, and the gray analysis of images shows that mixing inhomogeneity is about 7.5% and 9.4% for the mixing ratio of 5∶1 and 10∶1, respectively. Furthermore, mixing inhomogeneity for a combination of static mixing elements (four from Cross-over-Disc and three pairs from Sulzer-type) can be decreased to 2.1%—3.1% within a reasonable range of pressure drop.

Keywords： static mixer Cross-over-Disc pressure drop mixing performance high viscous fluid

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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: MR fluid is known as one of successful smart materials whose rheological properties can be varied byHowever, ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain intervaldue 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 theexperimentally, 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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Key technology research and field test of offshore viscous polymer flooding

Zhang Fengjiu,Jiang Wei,Sun Fujie,Zhou Shouwei

Strategic Study of CAE 2011, Volume 13, Issue 5, Pages 28-33

Abstract: analysis of EOR techniques of offshore thickened oil, a series of resolutions and techniques on driving fluid

Keywords： offshore heavy oil polymer flooding displacing fluid polymer solution preparation produced fluid

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Stability of an annular viscous liquid jet in compressible gases with different properties inside and

Chunji YAN, Maozhao XIE,

Frontiers in Energy 2010, Volume 4, Issue 2, Pages 198-204 doi: 10.1007/s11708-009-0054-5

Abstract: A spatial linear instability analysis is conducted on an annular viscous liquid jet injected into compressible

Keywords： liquid jet dominant wave number compressibility instability

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Parametric control of structural responses using an optimal passive tuned mass damper under stationary

Min-Ho CHEY, Jae-Ung KIM

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 267-280 doi: 10.1007/s11709-012-0170-x

Abstract: In this study, the structural control strategy utilizing a passive tuned mass damper (TMD) system as

Keywords： tuned mass damper parametric optimization passive control white noise earthquake excitation

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Study of steam injection technology for low permeablehigh viscous light oil reservoir

Wang Lizhi,Wang Yunlong

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 88-94

Abstract: approaches to reduce viscosity of crude oil reservoirs, increase permeability and improve flow rate of high viscousindicated suitable reservoir geological conditions for steam-flooding extraction of low permeable high viscous

Keywords： low permeability high viscous light oil steam-flooding extraction

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Hysteretic behavior of cambered surface steel tube damper: Theoretical and experimental research

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 606-624 doi: 10.1007/s11709-023-0925-6

Abstract: A novel cambered surface steel tube damper (CSTD) with a cambered surface steel tube and two concave

Keywords： cambered surface steel tube damper energy dissipation capacity finite element model hysteretic performance

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Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4, Pages 410-416 doi: 10.1007/s11465-012-0341-4

Abstract: The present investigation aims at developing a magneto rheological (MR) fluid damper for suppressingThe magneto rheological Fluid acts as a viscoelastic spring with non-linear vibration characteristicsthat are controlled by the composition of the magneto rheological fluid, the shape of the plunger andvibration and promote better cutting performance during turning of AISI 4340 steel of 46 HRC with minimal fluidIt was observed that the use of MR fluid damper reduces tool vibration and improves the cutting performance

Keywords： tool vibration magneto rheological damper hard turning surface finish tool wear

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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 squeezeTo verify rationality of analytical method, the MRG damper is designed and fabricated according to thethat the proposed analytical method is feasible and provides the reference value for designing MRG damper

Keywords： magnetorheological grease (MRG) damper squeeze model

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Application of coupled multi-body dynamics–discrete element method for optimization of particle damper

Danhui DAN, Qianqing WANG, Jiongxin GONG

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 244-252 doi: 10.1007/s11709-021-0696-x

Abstract: the application of the particle damping technology to cable vibration attenuation, the rootless cable damperpaper, a coupled multi-body dynamics–discrete element method is proposed to simulate the damping of the damper–cableThe simulation results demonstrate the damping efficiency of rootless particle damper under different

Keywords： granular material vibration control discrete element method particle damper cable vibration

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Review of the LNG intermediate fluid vaporizer and its heat transfer characteristics

Frontiers in Energy 2022, Volume 16, Issue 3, Pages 429-444 doi: 10.1007/s11708-021-0747-y

Abstract: The intermediate fluid vaporizer (IFV), different from other liquefied natural gas (LNG) vaporizers,Moreover, studies on the fluid flow and heat transfer behaviors of the supercritical LNG inside the tubesand the condensation heat transfer of the intermediate fluid outside the tubes are summarized.

Keywords： intermediate fluid vaporizer design of structure and intermediate fluid condensation heat transfer

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Review of fluid and control technology of hydraulic wind turbines

Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 312-320 doi: 10.1007/s11465-017-0433-2

Abstract:

This study examines the development of the fluid and control technology of hydraulic wind turbinesThe current state of hydraulic wind turbines as a new technology is described, and its basic fluid model

Keywords： wind turbine hydraulic system fluid model control technology