please forward me ppt and report on seismic dampers

please forward me ppt and report on seismic dampers ....etc

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Abstract:
A modified friction damper is presented to enhance the performance of conventional friction damper and semi-active variable friction damper. An additional plate is provided between the two sliding plates of a conventional friction damper which results in an additional sliding interface with the same normal (clamping) force. Similar modification is also made to semi-active variable friction damper (SAVFD) to enhance its performance. The enhancement in the performance of the benchmark building is studied under across wind loads ....etc

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GUIDED BY
PROF. B. Koti Veerachari

SUBMITTED BY
Rakesh Kumar


List of contents
Introduction
Types of vibration
Effects of vibration
Sources of vibration excitation
Vibration control in machine tool
Damping
Conclusion
References

Introduction
Machining and measuring operations are invariably accompanied by vibration.
To achieve higher accuracy and productivity vibration in machine tool must be controlled.
For analysis of dynamic behavior of machin ....etc

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ABSTRACT
This dissertation proposes simple and efficient control algorithms for seismically excited structures using MR dampers and a smart passive system based on MR dampers. Magnetorheological (MR) dampers are one of the most promising control devices for civil engineering applications to earthquake hazard mitigation, because they have many advantages such as small power requirement, reliability, and low price to manufacture. A number of control algorithms have been adopted for semi active systems including the M ....etc

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please tell us the disadvantages of magneto rheological suspension or please tell us if any modification can be made to improve its effeincy ....etc

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Innovative Designs for Magneto-Rheological Dampers



Introduction
The main purpose of this chapter is to introduce the topic of magneto-rheological
(MR) dampers to the reader. Also presented is an explanation of the mechanism
through which MR fluid works. Lastly, the project objectives and the approach
taken to evaluate different MR damper designs are discussed.

1.1 An Overview of Magneto-Rheological Dampers
In recent years, manufacturers have shown an increased inte ....etc

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Abstract
Purpose: This paper presents the properties of magneto-rheological fluids and their recent applications and development In recent years. This paper particularly deals about the use of MR fluids in shock absorbing system in cars.
Reviews: The theoretical research results of the properties and applications obtained in the past decades and their developments are also reviewed.
Findings: It is very clearly and well understood from the presented paper that replacement of the traditional methods w ....etc

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Shock absorbers and their performance during the earthquake. In addition, they have investigated the world's tall buildings and have studied a satisfactory level of damper performance. And the results show that not only shock absorbers have acceptable seismic behavior against lateral forces such as wind and earthquakes. However, it has reduced the limitations of building multi-storey buildings. A tuned dampener, also known as a harmonic damper, is a device mounted on structures to reduce the amplitude of mechanical vibrations. Its application c ....etc

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A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet This allows the damping characteristics of the shock absorber to be continuously controlled by varying the power of the electromagnet. This type of shock absorber has several applications, most notably in semi-active vehicle suspensions which may adapt to road conditions, as they are monitored through sensors in the vehicle, and in prosthetic limbs. ....etc

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looking for differnt dampers used in tall buildings ppt ....etc

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