Lab 5.pdf - ME 352-A Lab 5 Static and Dynamic Balancing of...

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ME 352-A Lab 5: Static and Dynamic Balancing of Rotor Part A: Static Balancing Concept : When rotor is statically balanced, then the center of mass lies on the axis of rotation A Crosscheck : Rotate the shaft to any angular position and leave it. If it is statically balanced then the shaft will retain its position. Procedure: a) You are provided with 4 different masses(in from of bars) and thus “the s h aft + 4 masses” constitutes your system b) As of now you assume that the center of mass of the bars is at equidistant from the axis of rotation. c) d) Orient the masses on the shaft in such a way that : a. center of mass = ∑? 𝑖 𝒓 𝒊 = 𝟎 e) For that randomly orient masses ? 1 and ? 2 (at 𝜃 1 𝑎?𝑑 𝜃 2 ) and then analytically solve for getting orientation of ? 3 and ? 4 (i.e. 𝜃 3 𝑎?𝑑 𝜃 4 ) f) Manually orient m3 and m4 at calculated angles 𝜃 3 𝑎?𝑑 𝜃 4 and then see if there is unbalance (there will be most probably).
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