Preface Over the years there have been many outstanding books written on vibrations@ including textbooks@ books on analysis and design@ and theoretical treatises. Why then should there be another@ and@ specifi cally@ why this book? Th ere are several reasons: First@ vibrations@ as with all science and engineering subjects@ is continually evolving. As new discoveries and new analyses and new experimental procedures are developed@ there is an ongoing need to document these advances. Next@ with the evolution in the subject@ many of the older procedures become obsolete. Traditional topical emphases become less important@ and are superseded by advances in computational and measurement methods. Consequently@ new topical emphases are emerging. Th ere is a need to document these new methods for students and for practicing engineers. Finally@ it is always helpful to have a state-of-the-art treatise on fundamentals enabling future research and application. We wrote this book attempting to satisfy each of these needs. Th e book summarizes basic concepts and established analytical methodologies. We then illustrate these ideas and procedures via worked-out examples. Numerous examples using Matlab are presented throughout the text. Th e various chapters contain problems (with answers) for readers studying the subject for the fi rst time@ and for those seeking additional expertise and/ or review. In the later chapters@ we illustrate application in automotive engineering with a focus upon engine balancing and engine mounting systems. Finally@ the book is intended to be a quick reference for current (circa 2010) modeling and analysis methods. Th e book is divided into twelve chapters@ with the fi rst of these providing an introduction to vibration terminology. In the second chapter we review the fundamentals of single-degree-of-freedom systems@ and in the third chapter we consider harmonically excited motion. Th e fourth chapter applies these concepts with rotors@ outlining balancing methods. In the fifth chapter we study multi-degree-of-freedom systems@ and then we devote a chapter to numerical methods. In the seventh chapter we introduce the concept of transfer functions and frequency response functions together with a detailed discussion about these functions. Chapter eight explores lumped parameter modeling and chapter nine follows with analyses of continuous systems. Chapter ten provides an extensive exposition of engine mounting systems. Chapter eleven summarizes experimental modal analysis methods@ including the basic theory and an account of signal processing and test procedures. In the final chapter@ we conclude with some special topics@ such as the frequency response function (FRF)-based substructure method@ the hybrid finite element and experimental (HYFEX) method@ system sensitivity analysis@ and vibration absorber tuning. Prior to writing this book we were fortunate to have studied under and been associated with academicians and engineers in industry who have signifi cantly advanced the state of the art through their research@ development@ application@ and exposition of both theoretical and experimental breakthroughs. We are particularly appreciative of the inspiration provided by the innovations of faculty (David L. Brown and Randall J. Allemang) and students at the Structural Dynamics Research Laboratory (SDRL) at the University of Cincinnati@ and of engineers in local industries@ and particularly in the automotive industry. We have relied heavily upon these sources for our exposition. We have also@ of course@ relied upon many others@ as cited in the references and permissions. We have attempted to acknowledge all sources@ but undoubtedly have missed many which should have been cited. We apologize for any such omissions. A number of the examples in this book have originated with the references listed in the chapters. Although we attempt to acknowledge these sources@ the examples are not direct quotations. Instead they are usually done diff erently and oft en more extensively than in the quoted sources. We appreciate the assistance of Charlotte Better in preparing the manuscript. We also appreciate the assistance of Aaron Lock in preparing the artwork for this book. Finally@ we are grateful to the Society of Automotive Engineers (SAE) for their interest and their acceptance of our work.
SAE R-395-2011 history
2011SAE R-395-2011 Principles of Vibration Analysis With Applications in Automotive Engineering