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.




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.




Vehicle Noise, Vibration, and Sound Quality


Book Description

This book gives readers a working knowledge of vehicle vibration, noise, and sound quality. The knowledge it imparts can be applied to analyze real-world problems and devise solutions that reduce vibration, control noise, and improve sound quality in all vehicles—ground, aerospace, rail, and marine. Also described and illustrated are fundamental principles, analytical formulations, design approaches, and testing techniques. Whole vehicle systems are discussed, as are individual components. The latest measurement and computation tools are presented to help readers with vehicle noise, vibration, and sound quality issues. The book opens with a presentation of the fundamentals of vibrations and basic acoustic concepts, as well as how to analyze, test, and control noise and vibrations. The next 2 chapters delve into noise and vibrations that emanate from powertrains, bodies, and chassis. The book finishes with an in-depth discussion on evaluating noise, vibration, and sound quality, giving readers a solid grounding in the fundamentals of the subject, as well as information they can apply to situations in their day-to-day work. This book is intended for: •Upper-level undergraduate and graduate students of vehicle engineering •Practicing engineers •Designers •Researchers •Educators




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.




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 lifeIntroduces the principles of friction-vibration interactionsAnalyzes, presents experiments, and treats real systems ranging from nano to micro to macro scales










Noise, Vibration and Harshness of Electric and Hybrid Vehicles


Book Description

The noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is a critical feature for customers to assess the performance and quality of vehicles. NVH characteristics are higher among factors that customers use to judge the vehicle's quality.This book sets out to introduce the basic concepts, principles, and applications of the NVH development and refi nement of Battery Electric Vehicles (BEV), Hybrid Electric Vehicles (HEV), and Fuel Cell Electric Vehicles. Each type comes with its own set of challenges.







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.