4684

4412

كارشناسي ارشد

طراحي كاريردي

اصفهان: دانشگاه صنعتي اصفهان،دانشكده مكانيك

1387

ده،102،[II]ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

سعيد ضيايي راد، محسن اصفهانيان

88/7/14

سعيد بهبهاني، حميدرضا ميردامادي

1396/09/20

كتابنامه

مهندسي مكانيك

ID4412

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Vibrational Modelling and Analysis of a Mechanical System Equipped by Magneto Rheological Fluid Damper Tara Farizeh t farizeh@me iut ac ir 11 March 2009 Department of Mechanical Engineering Isafahan University of Technology Isafahan 84156 83111 IranDegree M Sc Language FarsiDr Saeid Ziaei Rad szrad@cc iut ac irAbstract Magnetorheological MR fluids offer solutions to many engineering challenges Thesuccess of MR fluid is apparent in many disciplines ranging from the automotive and civilengineering communities to the biomedical engineering community The success of MRfluids continues to motivate current and future applications of MR fluid One of the criticalobstacles to progress in developing MR fluids has been a lack of understanding in theunderlying mechanisms of magnetorheology Because of the nonlinear and complex nature ofcontrollable fluids it seems likely that suitable modeling that can forecast the operation ofMR devices will continue to play a significant role in the design optimization of thesedevices In this thesis a multidisciplinary finite element analysis is performed involvingmagnetostatics and fluid flow analysis to study the behavior of the MR system and to serveas basis for a multidisciplinary design optimization procedure A finite element model wasbuilt to analyze and examine a 2 D axisymmetric MR damper force velocity diagrams Comparison between finite element results and non dimensional theory results shows goodagreements The results obtained from these tow approaches will help designers to createmore efficient and more reliable MR dampers Non dimensional parameters of MR dampers that can affect on the non dimensional plugthickness and equivalent viscous damping coefficient are then discussed In addition comparisons between mixed and flow mode dampers are undertaken using this non dimensional parameters The electro magnetic components of an MR damper are characterized by multiple designvariables In this thesis first the necessary background information about these variables arepresented Then an MR smart structure design method is presented according to the wholerequirement of smart structure characteristics Multi objective function method is used fordesign optimization of an automotive MR damper In the last chapter of this thesis dynamic behavior of an MR damper as an element in atruss structure is analyzed to show the performance of these devices and effect of them on thevibration mitigation of mechanical structures Around 32 decrease in amplitude fortransient vibration of a 3D truss structure equipped with MR damper shows an excellentperformance for these devices Key wordsMR Damper Finite Element Analysis Design Optimization Dynamic Response

سعيد ضيايي راد، محسن اصفهانيان

سعيد بهبهاني، حميدرضا ميردامادي