Friction-Induced Vibrations and Self-Organization


Book Description

Many scientists and engineers do not realize that, under certain conditions, friction can lead to the formation of new structures at the interface, including in situ tribofilms and various patterns. In turn, these structures-usually formed by destabilization of the stationary sliding regime-can lead to the reduction of friction and wear. Friction-I




Vibration of solids and structures under moving loads


Book Description

Transport engineering structures are subjected to loads that vary in both time and space. In general mechanics parlance such loads are called moving loads. It is the aim of the book to analyze the effects of this type of load on various elements, components, structures and media of engineering me chanics. In recent years all branches of transport have experienced great advances characterized by increasingly higher speeds and weights of vehicles. As a result, structures and media over or in which the vehicles move have been subjected to vibrations and dynamic stresses far larger than ever before. The author has studied vibrations of elastic and inelastic bodies and structures under the action of moving loads for many years. In the course of his career he has published a number of papers dealing with various aspects of the problem. On the strength of his studies he has arrived at the conclusion that the topic has so grown in scope and importance as to merit a comprehensive treatment. The book is the outcome of his attempt to do so in a single monograph.




Friction-Induced Vibrations and Sound


Book Description

The impact of friction-induced vibrations varies industry by industry. In the automotive industry, it affects the reliability and quality of mechanical components. For magnetic hard drives, it can affect stability. Over the last two decades, much research has been dedicated to addressing this critical area, and while the results have been significant, until now, this research has remained scattered throughout the literature. A Unified Framework: Both Elegant and Applicable Bringing together recent research and advances from several industries, Friction-Induced Vibrations and Sound presents a unified theoretical framework that engineers and researchers will find immediately applicable. Drawing on his in-depth experience in the data storage, electronics, and automotive industries, as well as his involvement with academic research, Gang Sheng presents a complete survey of this interdisciplinary subject. In the first chapters he offers a theoretical basis for friction induced vibrations. He explains the underlying principles, while also delving into methods for analyzing vibration and sound at the nano-, micro-,and macroscale levels. Sheng reinforces these concepts by taking a thoughtful look at friction-induced vibrations and sound in nature and everyday life. The latter chapters examine critical engineering applications in the data storage and automotive industries. Here Sheng illustrates the impact of advances in modeling and experimental analysis. He elaborates with detailed coverage of acoustic emission techniques used in computer hard disk drive systems, as well as noise control in automotive belt drive and brake systems. As the first comprehensive resource of its kind, this volume provides a grounding that will allow those in industry to address their specific challenges with vibration and sound. It also provides the stimulation and a starting point for those researchers looking to develop new solutions to problems that persist in the field.




Piezoelectric Energy Harvesting


Book Description

The transformation of vibrations into electric energy through the use of piezoelectric devices is an exciting and rapidly developing area of research with a widening range of applications constantly materialising. With Piezoelectric Energy Harvesting, world-leading researchers provide a timely and comprehensive coverage of the electromechanical modelling and applications of piezoelectric energy harvesters. They present principal modelling approaches, synthesizing fundamental material related to mechanical, aerospace, civil, electrical and materials engineering disciplines for vibration-based energy harvesting using piezoelectric transduction. Piezoelectric Energy Harvesting provides the first comprehensive treatment of distributed-parameter electromechanical modelling for piezoelectric energy harvesting with extensive case studies including experimental validations, and is the first book to address modelling of various forms of excitation in piezoelectric energy harvesting, ranging from airflow excitation to moving loads, thus ensuring its relevance to engineers in fields as disparate as aerospace engineering and civil engineering. Coverage includes: Analytical and approximate analytical distributed-parameter electromechanical models with illustrative theoretical case studies as well as extensive experimental validations Several problems of piezoelectric energy harvesting ranging from simple harmonic excitation to random vibrations Details of introducing and modelling piezoelectric coupling for various problems Modelling and exploiting nonlinear dynamics for performance enhancement, supported with experimental verifications Applications ranging from moving load excitation of slender bridges to airflow excitation of aeroelastic sections A review of standard nonlinear energy harvesting circuits with modelling aspects.




Friction-Induced Vibration in Lead Screw Drives


Book Description

Friction-Induced Vibration in Lead Screw Drives covers the dynamics of lead screw drives with an emphasis on the role of friction. Friction-induced vibration in lead screws can be the cause of unacceptably high levels of audible noise as well as loss of operation accuracy and shortened life. Although lead screw drives have a long history and their mechanical design and manufacturing aspects are very well understood, the role of friction in their dynamical behavior has not been comprehensively treated. The book draws on the vast body of work on the subject of dynamical systems with friction (such as disk brake systems) and offers said treatment, along with: · Unique coverage of modeling of multi-DOF lead screw systems with friction · Detailed analysis of negative damping, mode coupling, and kinematic constraint instability mechanisms in lead screws drives · A practical parameter identification approach for the velocity dependent coefficient of friction in lead screw drives Friction-Induced Vibration in Lead Screw Drives serves as the definitive text on the friction-induced vibration of lead screws, and includes a practical case study where the developed methods are used to study the excessive noise problem of a lead screw drive system and to put forward design modifications that eliminate the friction-induced vibrations.




Handbook of Friction-Vibration Interactions


Book Description

Friction-vibration interactions are common but important phenomena in science and engineering. Handbook of Friction-Vibration Interactions introduces the principles and provides the resources to understand and work with them. A unified theoretical framework includes some of the most important engineering applications. The first three chapters in the book introduce basic concepts and analytical methods of friction and vibration. The fourth chapter presents the general principles on friction-vibration interactions, and also touches on various engineering applications. In the fifth chapter the concepts and methods are extended to some of the most critical engineering applications in high-tech industry, presenting the friction-vibration interaction principle and applications in data storage systems. - Covers a key topic in science and engineering, with applications in daily life - Introduces the principles of friction-vibration interactions - Analyzes, presents experiments, and treats real systems ranging from nano to micro to macro scales




Fluid-Structure-Sound Interactions and Control


Book Description

This book presents the proceedings of the Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC), (held in Tokyo on Aug. 21-24, 2017), which largely focused on advances in the theory, experiments on, and numerical simulation of turbulence in the contexts of flow-induced vibration, noise and their control. This includes several practical areas of application, such as the aerodynamics of road and space vehicles, marine and civil engineering, nuclear reactors and biomedical science, etc. Uniquely, these proceedings integrate acoustics with the study of flow-induced vibration, which is not a common practice but can be extremely beneficial to understanding, simulating and controlling vibration. The symposium provides a vital forum where academics, scientists and engineers working in all related branches can exchange and share their latest findings, ideas and innovations – bringing together researchers from both east and west to chart the frontiers of FSSIC.




Noise and Vibration in Friction Systems


Book Description

The book analyzes the basic problems of oscillation processes and theoretical aspects of noise and vibration in friction systems. It presents generalized information available in literature data and results of the authors in vibroacoustics of friction joints, including car brakes and transmissions. The authors consider the main approaches to abatement of noise and vibration in non-stationary friction processes. Special attention is paid to materials science aspects, in particular to advanced composite materials used to improve the vibroacoustic characteristics of tribopairs The book is intended for researchers and technicians, students and post-graduates specializing in mechanical engineering, maintenance of machines and transport means, production certification, problems of friction and vibroacoustics.




Advances in Acoustics and Vibration


Book Description

The book provides readers with a snapshot of recent research and industrial trends in field of industrial acoustics and vibration. Each chapter, accepted after a rigorous peer-review process, reports on a selected, original piece of work presented and discussed at International Conference on Acoustics and Vibration (ICAV2016), which was organized by the Tunisian Association of Industrial Acoustics and Vibration (ATAVI) and held March 21-23, in Hammamet, Tunisia. The contributions, mainly written by north African authors, covers advances in both theory and practice in a variety of subfields, such as: smart materials and structures; fluid-structure interaction; structural acoustics as well as computational vibro-acoustics and numerical methods. Further topics include: engines control, noise identification, robust design, flow-induced vibration and many others.This book provides a valuable resource for both academics and professionals dealing with diverse issues in applied mechanics. By combining advanced theories with industrial issues, it is expected to facilitate communication and collaboration between different groups of researchers and technology users.




Sound Inventions


Book Description

Sound Inventions is a collection of 34 articles taken from Experimental Musical Instruments, the seminal journal published from 1984 through 1999. In addition to the selected articles, the editors have contributed introductory essays, placing the material in cultural and temporal context, providing an overview of the field both before and after the time of original publication. The Experimental Musical Instruments journal contributed extensively to a number of sub-fields, including sound sculpture and sound art, sound design, tuning theory, musical instrument acoustics, timbre and timbral perception, musical instrument construction and materials, pedagogy, and contemporary performance and composition. This book provides a picture of this important early period, presenting a wealth of material that is as valuable and relevant today as it was when first published, making it essential reading for anyone researching, working with or studying sound.