IRJET- Simulation of Structural Vibration Controlled System using Semi Actively Controlled MR Dampers

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 05 | May 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 808
SimulationofStructuralVibrationControlledSystemUsingSemi Actively
ControlledMRDampers
Rahul Arghode1, Dr. G.D. Awchat2
1M-tech Student, Department of Civil Engineering, GurunanakInstituteofTechnology,Nagpur,MS,India
2Professor and Dean, Department ofCivil Engineering, GurunanakInstituteofTechnology,Nagpur,MS,India
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Abstract - Semi-dynamic disconnection framework have gotten consideration over the dynamic and uninvolved
separation framework for vibration, alleviation of vibration in modern application is the basic improvement. Magneto
rheological damperspeedyreactiontounexpectedmoveswith less power utilization prompts many research andstructureof
MR damper for various plan parameters and variable flow contribution, in this present work planned a MR damper with
all the essential structure parameter data assembled from before work., number of loops required to create the
compelling attractive transition field has been determined to plan the magneto rheological damper and to arrive most
extreme attractive motion thickness versus dc ebb and flow with legitimate extent level of ferrite particles in MR liquid
which further prompts ascertain shear pressure and damper power can deliver by the planned MR damper at variable ebb
and flow input.
Key Words: MR damper, MR fluid, damping force
1. INTRODUCTION
Recently rising semi-dynamic control device, magneto rheological (MR) damper, indicates great promises for stun
assimilation in the fields, for example, structural designing, aeronautic design, car building, etc. Some issue ought to be
completely concentrated to make MR dampers use broadly in engineering, for example, plan ofMR dampers, execution tests
and numerical model forMR dampers.
The customary strategies utilized for the ideal structure of MR damper are done through streamlining the geometric and
parameters of the electromagnetic circuit [1].In a MR gadget, magnet get together assumes a significant job in gadget in
general attributes. Electromagnet configuration influences both liquid stream and magnetics. Since the hole is likewise part
attractive circuit, it influences the attractive execution parameters, for example, motion thickness and time response.so
following are the goals of magnet get together plan for MRgadget
Design a low hesitance attractive circuit that manages the attractive transition lines into a locale where MR liquid shouldbe
stimulated(forthemostpartanannular gapinthe scope of 0.5– 2 mm). • Minimize weight and cost of the electromagnet by
utilizing least center material and selecting simple to assembleparts.
• Select loop parameters, e.g., the quantity of turns and wire check, to furnish the required magneto-thought process
powerwithleast ohmicresistance.Animperativeisthealloutspace available to oblige theloop.
Gavinetal. [3]has talkedabout thetwo noteworthy structureobjectivesforthemgadgets.Tostartwith, the dampers must have
lowelectrical power usage. Second, the power in the gadget must reaction quickly to changes on the electrical direction flag.
Aydar et al. [4] has planned and created a little MR damper, which can be possibly connected to a level pivot, front-stacking
clothes washer. Lee et al. [5] has considered the coordinated structure strategy for an extensive scale MR damper and
electromagnetic enlistment frameworkandhas alsoconsidereda brilliantaloof control framework for lessening remain link
reactions in this investigation. Taking into thought that most MR dampers have annular attractively dynamic region, Chooi
et al. [6] has designed and createdatwofoldtuberdamperdependentonthe annular arrangement and on the compressibility
of MRfluidinsidethechambers. Jorgeetal.[7]has proposed a way to deal with discover the preparation inputs for detection
of a MR damper, which has the attributes of decrease of abuse of the damper, number of examinations and arrangements of
preparing inputs. A later report by Ding et al. [8] has also planned and manufactured two MR dampers with full-length
compelling damping way and an arrangement of tests have been performedtoacquire the force– dislodging bends and the
force– speed bends of thedamper.
Inthispaperconsideringallparametersestablished by earlier work considered to deign low force MR damper and analysis is
carried out for variable current from 0.1A to 1.0A for maximum magnetic flux density. Based on resulted Maximum flux
density shear stress computed and also computed thedampingforcegeneratedbythedesignedmodel

1.1 MAGNETO RHEOLOGICAL DAMPER DESIGN PROCESS
The MR damper plan process comprises of material determination, geometry structure and attractive circuit design.One
of the objectives for materials choice is to pick a sort of MR liquid that has low apparent viscosity and proper attractive
immersionyieldquality.Anotherobjective for materials determinationis to choosethe materials ofthe barrel and cylinder, in
which the immersion enlistment thickness ought to be higher than the attractive field force when MR liquid accomplishes
attractive immersion yield strength, so that the MR liquid can be utilized completely. The errand of geometry configuration is to
pick a fitting hole, significant cross-segment zone of cylinder head and a functioning post length to fulfill the design
requirements. The target of attractive circuit design is to decide the quantity of the loops, with the goal that the attractive
acceptance thickness in the annular flow path produced by attractive circuitis more than theattractivefield force when MR
liquid achieves magnetic immersion yieldquality.
1.2 MATERIALS SELECTION
For the cylinder and the piston, the two parts are not only the part of magnetic circuit but also the main force delivery
members of MR dampers. Therefore, Steel 1008less carboncontentwhichhavehigh magneticpermeabilityand high saturation
induction density, are adopted for manufacturing the pistonandthecylinder, respectively
2. CONCEPT DEVELOPEMENT
Magneto-rheologicaldamperdesign requiresknowledgeof fluiddynamics,electromagneticprinciples,andbasicmachine design.
The purpose of this section is to describe the guidelines of designing and manufacturing MR dampers. As a Semi active control
device, MR damper have paid more attentionandappliedinmanyareastomitigatethevibration, sosuppressionofvibrationwill
becarriedoutinthreeways as explained below. The process of vibration suppression systemisin differentcategories stepby
stepShowsinfig.1
MR dampersarecategorized as “semi-active”.Thisindicates that these dampers retain some of their damping properties even
when there is no power supply, or even when the controllerfails.Insuch casesthedamperrevertstoapassive state, working
as a passive damper. This property is a significant advantage over similar systems which are not semi- active.
Fig.1 overview of Vibration Suppression
MRdampersarecategorizedas“semi-active”.Thisindicates that these dampers retain some of their damping properties even
when there is no power supply, or even when the controllerfails.Insuch casesthedamperrevertstoapassive state, working
as a passive damper. This property is a significant advantage over similar systems which are not semi- active.
3. GEOMTERY DESIGN
MR dampers havebeencreatedfordifferentsizes,setupsand burdenprerequisitesforexplicitburdenapplications.Ofthe three
methodsofactivityofMRliquidtalkedaboutabove,MR damperworksinvalvemodeandforspecificapplicationsin consolidated

(blended)methodofvalveandshear.Inviewof the development strategy, MR dampers are grouped into mono cylinder, twin
cylinder and tri-tube gadgets. Mono cylinder is the generally utilized structure because of its straightforwardness for plan
and manufacture. Twin cylinder structures are utilized for burden serious applications and tri-tube configuration is still in the
lab look into. The sort of damper investigated in this exploration work is mono cylinder damper development. On a basic
level, it is like a traditional mono cylinder damper with couple of adjustments. By and large, a high-weight gas chamber is
availablewitha skimmingcylinderisolatingthegaschamber and working liquid. For fundamental undertaking investigations,
the gas chamber configuration is avoided and constrained to the principle working liquid or spring can be utilized. A primary
cylinderisavailable,isolatingtheworking liquid into two chambers –pressure chamber and bounce back chamber. An annular
is available in the middle of the cylinderandchamber.Scarcelyanystructures additionally join theannular holeinthecylinder
gettogetheritself.The figure 3 indicates one such structure.
The current in the loopcreates an attractive transition. The attractive transition goes through the attractive circuit of which
the cylinder, MR liquid hole, barrel divider are the fundamental segments. The cylinder and chamber are made of materials
with high porousness. The attractive transition crosses over the MR liquid motion as spillage motion. The underlying
structure stage for a MR damper includes the attractive circuit configuration joining the electromagnetic properties of the
cylindermaterial, barrelmaterial andMR liquid. This task work includes in the fundamental electromagneticexaminationofa
MRdamper.Speakstothe attractive circuit of the dynamic working space of the magnetorheologicaldamper.Thespeckedline
speaks to the progression of attractive transition lines. The motion lines structure a shut circle taking the most reduced
hesitancewayinthedynamicareadistrict.Themeasure ofdampingpowercreatedfromthedamperdependsup- ontheenactmentof
the MR liquid in the annular hole localethroughwhichMRliquidstreams.Thesuccessfully of the damper relies on the dynamic
volumeoftheMR liquidoverwhichattractivemotionisacting.
3.1 MAGNETICCIRCUITOFTHEMRDAMPER
Themagneticcircuit(loop)forthefluxflowisshowninFig.2. Thedottedlinerepresents thefluxflowdirection. Dottedred line
path shows the flow of magnetic fluxwhenelectromagnetic coils are active where outer cylinder and electromagnetic coil separated
byfluidflow gap
3.2 GEOMETRICPARAMETERS INVOLVED
The magnetic flux passes through various cross- sectionalareasinthedamper.Theparameterforeach of the flux area passage
is found out and listed. The magnetorheologicalfluidflowsintheannularorifice between the piston and cylinder, where the
piston bobbin portion acts as a magnetic pole and the piston outer portion acts as the complementary magnetic pole. The
fabricated MR damper is compared with LORD MR Damper 8040/1-0. The following dimensions are assumed for the
fabricated MR damper.
Table.1 GEOMETRICAL PARAMETERS
Flux path portion Geometricalparameter
Piston middle portion Piston diameter (Dp) Piston rod diameter (Dr)
Coil portion height (hc)
Table.2 DIMENSIONS
Piston bobbin portion Piston diameter (Dp)
Width of MR fluid gap (Lp)
Piston outer portion Piston diameter (Dp) MR fluid flow gap (g) Cylinder thickness
(ct)
MR fluid gap Piston diameter (Dp)
Width of MR fluid gap (Lp)

Fig.3MRDamper(monotubeMRdamperwith floatingpiston)
3.3 MRFLUID CHAMBER
An MRF consists of micron-sized, magnetically polarized particles Suspended in a carrier fluid, Such as Silicon or mineral oils.
MRFs are capable of responding to a magnetic field in a few milliseconds. The material properties of an MRF can be changed
rapidly by increasing or decreasing the intensity of the applied magnetic field. Silicon oil with suspended carbonyl iron
powder of 30% of volume is used for the designed damper in this project. Components are all applied of magnetic steel to
accommodate easier flow of MR fluid and effective activation when the current flow through the electric leads to the
electromagnetic coil, electromagneticcoilinducesmagneticfieldwhichpasses through the ferromagnetic particles suspended in
the MR fluid
4. CONCLUSION
In light of present work the plan of MR damper is finished and Analysis of damper at annular liquid stream hole attractive
transitionthicknessfordifferingcurrentgivesthe mostextremeattractivemotionthicknessatfixedvoltage,so acquired greatest
motion density(B) prompts figuring of shearpressureanddampingpowerofstructureddamper.In light of the accomplished
plan measurements the MR damper made and tried for damping power..
REFERENCES
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[9] Jolly MR, Bender JW, Carlson JD (1998) Properties and applicationsof commercial magnetorheological fluids. In: 5th
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IRJET- Simulation of Structural Vibration Controlled System using Semi Actively Controlled MR Dampers

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