Numerical Evaluation Method for Semi-Active Damping Characteristics of a Passive-Type MR Damper with Functional Damping Force

Abstract

An evaluation method for the damping force characteristics of a passive-type MR damper with functional damping characteristics equivalent to a semi-active damper is developed. Although the MR damper is a fully passive device without any electrical components such as sensors, power supplies, or power controllers, it exhibits a functional variable damping characteristic analogous to that of a semi-active damper. The developed evaluation method consists of static magnetic field analysis and algebraic equations representing the simplified fluid flow, and is executable with a low computational cost. The developed method was applied to the characteristic evaluation of a prototype passive-type MR damper. The obtained analytical results agree well with the measured damping force and the response characteristics of a single-degree-of-freedom system with the damper obtained in a shaking table test. These results indicate that the evaluation method can be effectively used when designing passive-type MR dampers.

Keywords

magnetorheological damper evaluation method.

Get full access to this article

View all access options for this article.

References

Carlson, J.D. 2003. ‘‘Innovative Devices That Enable Semi-Active Control,’’ In: Proceedings of the 3rd World Conference on Structural Control, April 2002, Como, Italy, pp. 227-236.

Carlson, J.D. 2007. Textbook in MR Technology Workshop Asia 2007, Lord Corporation, Tokyo, Japan.

Cho, S.W. , Jung, H.J. and Lee, I.W. 2005. ‘‘Smart Passive System Based on Magnetorheological Damper,’’ Smart Materials and Structures, 14:707-714.

Min, T. , Choi, H.G. , Yoo, J.Y. and Choi, H. 1997. ‘‘Laminar Convective Heat Transfer of a Bingham Plastic in a Circular Pipe - II. Numerical Approach - Hydrodynamically Developing Flow and Simultaneously Developing Flow,’’ International Journal of Heat and Mass Transfer, 40:3689-3701.

Murakami, T. , Sakai, M. and Nakano, M. 2009. ‘‘Damping and Response Characteristics of Passive Type MR Damper,’’ In: Proceedings of the 14th International Symposium on Applied Electromagnetics and Mechanics , 20-24 September, Xian, China, pp. 333-334.

Murakami, T. , Sakai, M. and Nakano, M. 2010. ‘‘Study on the Development of Passive MR Damper with Displacement-Dependent Damping Characteristics,’’ Journal of Fluid Science and Technology, 5:86-97.

Rabinow, J. 1948. ‘‘The Magnetic Fluid Clutch, ’’ AIEE Transactions, 67:1308-1315.

Rakheja, S. and Sankar, S. 1985. ‘‘Vibration and Shock Isolation Performance of a Semi-Active On-Off Damper,’’ ASME Journal of Vibration , Acoustics, Stress, and Reliability in Design, 107:398-403.

Vola, D. , Boscardin, L. and Latché, J.C. 2003. ‘‘Laminar Unsteady Flows of Bingham Fluids: a Numerical Strategy and Some Benchmark Results,’’ Journal of Computational Physics, 187:441-456.

10.

Yamamoto, H. and Nakano, M. 2002. ‘‘Rheological Properties and Dynamic Mechanical Model of a Magnetorheological Suspension in Pressure Flow Mode, ’’ Journal of the Society of Rheology, Japan, 30:83-88.

11.

Yang, G. 2001. Large-Scale Magnetorheological Fluid Damper for Vibration, Mitigation: Modeling: Testing and Control, PhD Dissertation, Notre Dame University, Indiana, USA.