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Lecture notes Mechanics of Materials
Mechanical vibration-I, Lecture notes for Mechanics of Materials. Pharos International University Pharos International University Mechanics of Materials, Engineering
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Mechanical vibration-III
Mechanical vibration-II
Mechanical vibration-I
Related Subjects Mechanics
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Search in the document preview Search keyword... CHAPTER 7 Dr. Bassuny EL-Souhily Chapter I Mechanical Vibrations 1 CHAPTER I Fundamentals of vibration
Vibration: It's the motion of a body or a system that is repeated after a given interval of time known as the period. Frequency: -The number of cycles of the motion per unit time (c.p.m, r.p.m, cps, Hz, rad/s). Amplitude: - The maximum displacement (velocity, acceleration or force) of the body or some parts of the system from the equilibrium position is the amplitude of the vibration of that point. Figure 1 Phase relationships among displacement, velocity, and acceleration are shown on these time history plots. Natural Frequency: If a body is suddenly disturbed in some manner it will vibrate at a definite frequency known as its natural frequency (). Dr. Bassuny EL-Souhily Chapter I Mechanical Vibrations 2 Figure 2: The Main parameters of the Simple harmonic motion Importance of the study of vibration: I- Most human activities involve vibration in one from or other: 1- We hear because our eardrums vibrate. 2- We see because light waves undergo vibration.
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