Gebundenes Buch

Introduction to Machine Dynamics

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This book introduces machine dynamics, an essential competency important for many applications such as designing robots for manufacturing/materials handling or the landing gear of an airplane, analyzing the motion of a piston in an internal combustion engine or a compressor, and designing a Mars Rover. Wherever a machine is used for force or power transmission, or a mechanism creates a desired motion, the methods studied in this book provide the fundamental knowledge needed for optimal design. Specific sections are provided on different types of mechanisms and conditions that should be met for obtaining a desired performance, including kinematic analysis of mechanisms using direct differentiation, relative motion, kinematic coefficients, and instantaneous centers. The Newton-Raphson method for solving complex nonlinear position analysis problems is discussed and the determination of dead and limit positions in mechanisms is presented. The relation between the angular velocity ratio theorem and the fundamental law of gearing is shown to provide a bridge between the concept of instantaneous centers and analyzing gears. Gears and gear trains are covered in detail and calculation of gear ratios in fixed-axis and planetary gear trains using the rolling contact equations is illustrated. Finally, power and force transmission in machines is covered. Static and dynamic cases are analyzed, and the author shows how the static solutions can provide approximations for the dynamic problems where inertia effects are not significant (low inertia and low accelerations). Application of matrix algebra for solving the system of equations of equilibrium (in statics) or equations of motion (in dynamics) is also illustrated. Because of the importance of balancing in any application involving rotating machinery, static and dynamic balancing are analyzed. The book concludes with a brief coverage of three-dimensional dynamics including Euler s equations and gyroscopic effect. Aimed at engineering students interested in machine dynamics across a range of disciplines, the book is also ideal as a reference for practicing engineers with a good understanding of statics, dynamics, and matrix algebra.

Weniger Details

Dr. Mehrdaad Ghorashi, Ph.D., P.E., CSWP, is a full Professor of Mechanical Engineering in the Department of Engineering, University of Southern Maine, Gorham, ME. Dr. Ghorashi has taught numerous coursed in the mechanical engineering curriculum in Sharif University of Technology and University of Southern Maine in the past 30 years. Specifically, he has taught a course on machine dynamics for fifteen years. His research areas include dynamics of structures and machinery, composite structures design, and limit state analysis of structures. Dr. Ghorashi has been a Professional Engineer (P.Eng.) in the Province of Ontario, Canada till 2011 and he is currently a Professional Engineer (P.E.) in the State of Maine, U.S. He has served as a certified Program Evaluator (PEV) for the Accreditation Board of Engineering and Technology (ABET) on behalf of the American Society of Mechanical Engineers (ASME). Dr. Ghorashi is a member of the Subgroup on External Pressure in ASME’s Boiler and Pressure Vessel Code Committee. He is also a member of the National Council of Examiners for Engineering and Surveying (NCEES) PE Mechanical (in Machine Design and Materials) and the NCEES FE Mechanical committees. Dr. Ghorashi earned his first PhD from Sharif University of Technology and his second PhD from Carleton University, with focus on vibrations, and composite structures, respectively. He is a recipient of the Best Professor Award from the Carleton Student Engineering Society. Dr. Ghorashi is a recipient of the Alexander Graham Bell Canada Graduate Scholarship Award (CGS), Natural Sciences and Engineering Research Council of Canada (NSERC), and the J.Y. and E.W. Wong Research Award in Mechanical/Aerospace Engineering, Faculty of Graduate Studies and Research, Carleton University. Dr. Ghorashi has received several SolidWorks certificates from Dassault Systèmes including CSWP and he is a SolidWorks Accredited Educator. His other book titled, Statics and Rotational Dynamics of Composite Beams has also been published by Springer.