A Temperature Controlled Semi-active Tuned Mass Damper Using Shape Memory Alloy for Vibration Reduction Applications PDF Download

Author: Haoyu Huang
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Manish Shrikhande
Publisher: Springer Nature
ISBN: 9819916089
Category : Science
Languages : en
Pages : 769

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This book presents select proceedings of the 17th Symposium on Earthquake Engineering organized by the Department of Earthquake Engineering, Indian Institute of Technology Roorkee. The topics covered in the proceedings include engineering seismology and seismotectonics, earthquake hazard assessment, seismic microzonation and urban planning, dynamic properties of soils and ground response, ground improvement techniques for seismic hazards, computational soil dynamics, dynamic soil–structure interaction, codal provisions on earthquake-resistant design, seismic evaluation and retrofitting of structures, earthquake disaster mitigation and management, and many more. This book also discusses relevant issues related to earthquakes, such as human response and socioeconomic matters, post-earthquake rehabilitation, earthquake engineering education, public awareness, participation and enforcement of building safety laws, and earthquake prediction and early warning system. This book is a valuable reference for researchers and professionals working in the area of earthquake engineering.

Author: Antonio Concilio
Publisher: Butterworth-Heinemann
ISBN: 0128192674
Category : Technology & Engineering
Languages : en
Pages : 936

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Shape Memory Alloy Engineering: For Aerospace, Structural and Biomedical Applications, Second Edition embraces new advancements in materials, systems and applications introduced since the first edition. Readers will gain an understanding of the intrinsic properties of SMAs and their characteristic state diagrams. Sections address modeling and design process aspects, explore recent applications, and discuss research activities aimed at making new devices for innovative implementations. The book discusses both the potential of these fascinating materials, their limitations in everyday life, and tactics on how to overcome some limitations in order to achieve proper design of useful SMA mechanisms. - Provides a greatly expanded scope, looking at new applications of SMA devices and current research activities - Covers all aspects of SMA technology - from a global state-of-the-art survey, to the classification of existing materials, basic material design, material manufacture, and from device engineering design to implementation within actual systems - Presents the material within a modular architecture over different topics, from material conception to practical engineering realization

Author: Alka Y. Pisal
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659816932
Category :
Languages : en
Pages : 244

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The structural control techniques are widely recognized as an effective means to reduce the response of inadequately damped systems. Its applications ranges from small rotating machines to large civil engineering structures subjected to earthquake or wind loading. Buildings and bridges that have been constructed using structural control shows that it is a valuable and promising engineering tool. The present research work mainly consists of two parts. In the first part of the study, harmonic and seismic response of the single-degree-of-freedom (SDOF) structure to which a passive and semi-active tuned mass friction damper (TMFD) is attached is investigated. Second part of the study focuses on the investigation of effectiveness of multiple tuned mass friction dampers (MTMFD) over a TMFD; here response of the multi-story structure and the bridge with TMFD is compared with response of the same structures with MTMFD. This study is intended to provide an insight to the feasibility of potential application of these devices in vibration control of structures and bridge.

Author: Fahad Abdulrahman Alhujaili
Publisher:
ISBN:
Category : Damping (Mechanics)
Languages : en
Pages : 120

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Extensive studies have been carried out, in recent years, to find methods to mitigate the unwanted structure vibration caused by human excitation, machinery, and winds. Modern structures such as floors and bridges using high strength materials, and extending across long spans are very flexible with negligible damping. Vibration control devices and strategies are constantly being developed to eliminate/dissipate the unwanted vibration and to increase the serviceability level of such structures. One such method for abating the vibration is tuned mass damping. In this dissertation, semi-active control of air-suspended tuned mass dampers with pendulum configuration was explored. A novel semi-active Air Sprung PTMD was designed, built, and evaluated, analytically and experimentally. The dynamics and control of such PTMD were evaluated, and its effectiveness was compared with that of the conventional passive PTMD. The main reason for introducing semi-active control to a TMD is to enable the TMD to adapt itself, robustly, to the primary structure's parameters (mainly mass and stiffness) changes and maintain its tuning. Following extensive analytical work, simulation, and experimentation it was found that the velocity feedback can modify the stiffness of the semi-active air-suspended tuned mass damper. Positive velocity feedback increases the stiffness while negative velocity feedback decreases it. Moreover, pressure and the acceleration feedback adjust the damping of the semi-active TMD. The air spring used in this work is of convoluted type. This type of air springs, because of their particular geometry, experiences a rather severe change in their cross-sectional area, as they contract and expand. It was found that to properly account for the impact of this important parameter on the inner-working of the air spring, one needs to consider two areas for the air spring, namely, the effective area and the geometric area. The effective area of the air spring is the area used to calculate the exerted force by the air spring while the geometric area is the cross-sectional area used to calculate the rate of change of the volume of the air enclosed in the air spring. The use of these two areas resulted in an accurate model of the air spring. The model of the semi-active PTMD was verified using the experimental setup. Both the simulation and experimental demonstrate the effectiveness of the semi-actively controlled air-suspended PTMD in adjusting its tuning frequency as well as damping.

Author: Ruth Collins
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Jose A. Inaudi
Publisher:
ISBN:
Category : Damping (Mechanics)
Languages : en
Pages : 460

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Author: Gebrail Bekdaş
Publisher: Springer Nature
ISBN: 3030983439
Category : Technology & Engineering
Languages : en
Pages : 193

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This book is a timely book to summarize the latest developments in the optimization of tuned mass dampers covering all classical approaches and new trends including metaheuristic algorithms. Also, artificial intelligence and machine learning methods are included to predict optimum results by skipping long optimization processes. Another difference and advantage of the book are to provide chapters about several types of control types including passive tuned mass dampers, active tuned mass dampers, tuned liquid dampers, tuned liquid column dampers and inerter dampers. Tuned mass dampers (TMDs) are vibration absorber devices used in all types of mechanic systems. The key factor in the design is an effective tuning of TMDs for the desired performance. In practice, several high-rise structures and bridges were designed by including TMDs. Also, TMDs were installed after the construction of the structures after several negative experiences resulting from the disturbing sway of the structures. In optimum design, several closed-form expressions have been proposed for optimum frequency and damping ratio of TMDs, but the exact optimization requires iterative optimization approaches. The current trend is to use evolutionary algorithms and metaheuristic optimization methods to reach the goal.

Author: Albert C. J. Luo
Publisher: Springer Nature
ISBN: 3031174992
Category : Technology & Engineering
Languages : en
Pages : 104

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Book Description
The tuned mass damper is one of the classic dynamic vibration absorbers with effective devices for energy dissipation and vibration reduction. The electromagnetically tuned mass damper system is extensively used for vibration reduction in engineering. A better understanding of the nonlinear dynamics of the electromagnetically tuned mass damper system is very important to optimize the parameters of such systems for vibration reduction. However, until now, one cannot fully understand complex periodic motions in such a nonlinear, electromagnetically tuned mass damper system. In this book, the semi-analytical solutions of periodic motions are presented through period-1, period-3, period-9, and period-12 motions. The corresponding stability and bifurcations of periodic motions are determined. The frequency-amplitude characteristics for bifurcation routes of such higher-order periodic motions are presented. This book helps people better understand the dynamical behaviors of an electromagnetically tuned mass damper system for the new development and design of vibration reduction and energy harvesting systems.

Author: Aramendiz Fuentes, Jimmy Alberto
Publisher: KIT Scientific Publishing
ISBN: 373151267X
Category :
Languages : en
Pages : 180

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Book Description
This work considers dampers that do not solely focus on a single strategy but instead combine them. The capabilities of conventional dry friction dampers are expanded by taking into account piecewise defined contact geometries. This leads to friction dampers that change their behavior depending on the amplitude of the oscillations. The vibration damping device in this work, introduces damping at high oscillation amplitudes and takes advantage of absorption at low oscillation amplitudes.