Transcription of CHAPTER 2 DYNAMIC FORCE ANALYSIS
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CHAPTER 2 DYNAMIC FORCE ANALYSIS
CHAPTER 2 DYNAMIC FORCE ANALYSIS When the inertia forces are considered in the ANALYSIS of the mechanism, the ANALYSIS is known as DYNAMIC FORCE ANALYSIS . Now applying D Alembert principle one may reduce a DYNAMIC system into an equivalent static system and use the techniques used in static FORCE ANALYSIS to study the system. Inertia FORCE and couple Figure 1: Illustration of inertia FORCE (i) a translating body (ii) a compound pendulum, (iii) inertia FORCE and couple on compound pendulum. Consider a body of mass moving with acceleration as shown in figure 1(i). According to D Alembert Principle, the body can be brought to equilibrium position by applying a FORCE equal to maiFma=and in a direction opposite to the direction of acceleration. Figure 1 (ii) shows a compound pendulum of mass m, moment of inertia gIabout center of mass G while rotating at its center of mass has a linear acceleration of and angular acceleration of a.
Dynamic Force Analysis of a Four bar Mechanism using Matrix Method In the four bar mechanism shown in Figure 1, Link 1 is the ground link (sometimes called the
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