0
Research Papers

A Squeeze-Flow Mode Magnetorheological Mount: Design, Modeling, and Experimental Evaluation

[+] Author and Article Information
T. M. Nguyen

Mechanical and Industrial Engineering Department,  The University of Minnesota Duluth, 1305 Ordean Court, VKH 105, Duluth, MN 55805tmnguyen@d.umn.edu

C. Ciocanel

Department of Mechanical Engineering,  Northern Arizona University, P.O. Box 15600, Flagstaff, AZ 86011constantin.ciocanel@nau.edu

M. H. Elahinia

Mechanical, Industrial and Manufacturing Engineering Department,  The University of Toledo, 2801 West Bancroft Street, Mailstop 312, Toledo, OH 43606mohammad.elahinia@utoledo.edu

J. Vib. Acoust 134(2), 021013 (Jan 18, 2012) (11 pages) doi:10.1115/1.4005011 History: Received July 07, 2009; Revised July 17, 2011; Published January 18, 2012; Online January 18, 2012

This paper presents a dual-mode magnetorheological (MR) fluid mount. Combining the fluid’s flow and squeeze modes of operation gives this MR mount a unique possibility for varying dynamic stiffness and damping. Details on the design of the internal structure of the mount and the magnetic circuit are provided. Simulation and experimental results are presented to show the effectiveness of the magnetic circuit. A mathematical model that combines the behavior of the fluid and the elastomeric parts and takes into account the magnetic activation of the fluid is used to gauge the effect of design parameters on the isolation characteristics of the mount. Experimental results show that in the proposed design, the dynamic stiffness of the mount may be varied over a wide range of frequencies making the mount a unique and versatile vibration isolation device for cases where input excitation occurs over a wide range of frequencies.

Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 23

Bird’s eye view of the upper part

Grahic Jump Location
Figure 2

Dynamic stiffness variation in the MR fluid mount shown in Fig. 1 [10]

Grahic Jump Location
Figure 3

Section view of the MR mount

Grahic Jump Location
Figure 4

Inner coil subassembly for squeeze mode: (a) Isometric section view and (b) front section view

Grahic Jump Location
Figure 5

Outer coil subassembly for flow mode (inner coil assembly is also shown in the center): (a) Isometric section view and (b) front section view

Grahic Jump Location
Figure 6

Magnetic flux density distribution within flow conduits with different geometries for 1 A electric current feeding the coils: (a) Rectangular 2.5 mm gap, (b) square 5 mm side, and (c) circular 5 mm diameter

Grahic Jump Location
Figure 7

(a) Magnetic flux line paths in a cross section cut through the outer magnetic circuit; (b) magnetic flux density variation along the vertical midline (the white dashed line shown in (a)) of the flow conduit with different geometries. The applied current was 1 A in all cases.

Grahic Jump Location
Figure 8

(a) Cross sectional view of the mount with the coils supplied with a 1 A electric current. (b) Overall field distribution in the MR fluid contained in the flow passage and on the bottom plate of the squeeze mode.

Grahic Jump Location
Figure 9

Flow mode only, displacement excitation of 0.2 mm

Grahic Jump Location
Figure 10

Flow mode only, displacement excitation of 1.0 mm

Grahic Jump Location
Figure 11

Flow mode only, displacement excitation 0.2 versus 1.0 mm

Grahic Jump Location
Figure 12

Squeeze mode only, displacement excitation of 0.2 mm

Grahic Jump Location
Figure 13

Squeeze mode only, displacement excitation of 1.0 mm

Grahic Jump Location
Figure 14

Squeeze mode only, displacement excitation of 0.2 versus 1.0 mm

Grahic Jump Location
Figure 15

Combined mode, displacement excitation of 0.2 mm

Grahic Jump Location
Figure 16

Combined mode, displacement excitation of 1.0 mm

Grahic Jump Location
Figure 17

Comparison in performance of individual modes and combined mode

Grahic Jump Location
Figure 18

Simulation versus experiment

Grahic Jump Location
Figure 19

Inner coil assembly

Grahic Jump Location
Figure 20

Outer coil assembly

Grahic Jump Location
Figure 21

Lower (left) and upper (right) plates

Grahic Jump Location
Figure 22

Bottom view of the upper part

Grahic Jump Location
Figure 1

(a) A small size variable-damping MR mount [77 ], (b) ER valve mount [99 ], (c) mount with MR valve and inertia track [88 ], and (d) ER squeeze mount [99 ]

Grahic Jump Location
Figure 24

Experimental setup—Bose machine on the left (white color), PCI box and analytical program on the right

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In