Developments in Vibration Control of Structures and Structural Components with Magnetorheological Fluids

Abstract

Vibration isolation and control of structures subjected to different types of dynamic loads due to periodic forces, impact and shock type forces and earthquake forces is an important area in structural engineering. The structures can be machine foundations, buildings, bridges, towers, automobiles, ship structures, military tanks and aeronautical structures. Some of these devices used are elastic springs, viscoelastic dampers, viscous fluid dampers, magnetorheological dampers and friction dampers. This article gives latest developments in vibration control of structures and structural components using magnetorheological fluids. The current status of technology and further research requirements to be studied in these areas are highlighted.Keywords: Automobile brakes, magnetorheological fluids, structure and structural components, suspension systems, vibration control.IMPROVEMENT in manufacturing technology has provided machines of higher ratings, longer bridges, taller buildings which requires to satisfy the static, dynamic capacity and serviceability and stability limits for members/ systems prescribed by codes of practice. These machines/ structures give rise to considerable higher dynamic forces and thereby higher stresses. This demands development of advanced control and safety systems to keep the structural members/systems static and dynamic responses within tolerable levels. The performance, safety and stability of structures supporting the machines/structures depend largely on their design of suspension systems and their interaction with the environment. In this article, current status of technology in development of magnetorheological and friction dampers and their use in vibration control of structural and structural components in different fields of engineering applications are presented.

Investigation the Effect of MR Fluid Composition on Properties at Low Strain Ranges

“…The chain structures increase the apparent viscosity of the fluid, causing a change from a liquid state to a solid-like state within milliseconds. The magnetic particles, under the influence of a magnetic field, form chain-shaped structures, which affects the flow limit in the MR fluid [20,21]. In recent years, significant progress has been made in understanding the effect of particle size on the rheological behavior of the material under study [22].…”

Influence of magnetic property of test plates on magneto-rheological behavior

“…MRF was often used in actuators fields [20,21]. The actuators surface was usually magnetic material, which was * Author to whom any correspondence should be addressed.…”

Research on Semi-Active Vibration Control of Pipeline Based on Magneto-Rheological Damper

“…Magneto-rheological (MR) damper based semi-active control systems could provide the reliability of a passive system and approach the effectiveness of an active control system without requiring heavy power supply. MR dampers have the advantages of strong damping force, broad temperature range, low energy consumption, fast response and simple structure [13,14]. Therefore, MR dampers have been widely applied in vibration and shock control, high-rise building anti vibration, vehicle suspension system, precision machining and crash worthiness systems [15,16].…”