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เนื้อหาย่อ : This book serves as an introduction to the subject of vibration engineering at the under- graduate level. The style of the prior editions has been retained, with the theory, computa- tional aspects, and applications of vibrations presented in as simple a manner as possible. In this edition, computer techniques of analysis are emphasized. Expanded explanations of the fundamentals are given, emphasizing physical significance and interpretation that build upon previous experiences in undergraduate mechanics. Numerous examples and prob- lems are used to illustrate principles and concepts. Favorable reactions and encouragement from professors and students have provided me with the impetus to write the fourth edi- tion of this book. Several new features have been added and many topics modified and rewritten. Most of the additions were suggested by those who have used the text and by numerous reviewers. Some important changes should be noted: ㆍ More than 900 new review questions have been added to help students in reviewing and testing their understanding of the text material. The review questions include multiple choice questions, questions with brief answers, true-false questions, ques- tions involving matching of related descriptions, and fill-in-the-blank type questions. ㆍ A new appendix has been added to introduce the basic ideas of MATLAB program ㆍ Several MATLAB-based examples are included in every chapter. ㆍ General-purpose computer programs using MATLAB, C++, and Fortran programming are given, along with applications, in all chapters for the solution of vibration problems. ㆍ Several new problems--including problems that are based on the use of MATLAB, C+t, and Fortran problemsㅡ-are given at the end of each chapter to expose students to many important computational and programming details. ㆍ Answers to the review questions and the source codes of all MATLAB, C++, and Fortran programs are posted at the website of the book. ㆍMore than 50 new illustrative examples appear throughout the book. More than 100 new problems have been added at the ends of various ming.