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Engineering · Mechanical Engineering
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Part 2: 3-Dimensional Dynamics Figure Q1b shows a sectioned view of the rotor of an automotive turbocharger mounted in bearings at A and B. The rotor spins at constant speed n, and is to be assessed for the effect of an unwanted oscillatory pitching motion on the bearings. A frame of reference Gxyz is fixed to the turbocharger casing. Oscillatory angular pitching motion of the casing about the y axis is defined as , sin(pt). The rotor can be treated as an inertially symmetric rigid body with principal moments of inertia xx, lyy, and Iz about the mass centre at point G. Figure Q1b i) Write down the angular velocity vector 2for moving frame Gxyz. [2 marks] [2 marks] 2 marks] v) Write down the dynamic moment generated at G about the z axis. [4 marks] Write down the angular velocity vector for the rotor o Write down the angular momentum vector of the rotor Note: Coriolis theorem may be used without proof,

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