PROBLEM 9.143 The machine element shown is fabricated from steel. Determine the mass moment of inertia of the assembly with respect to (a) the xaxis, (b) the yaxis, (c) the zaxis. (The specific weight of steel is 30.284 lb/in . ) SOLUTION Have 320.284 lb/in32.2 ft/smVVVgγρ===×( )230.0088199 lb s /ft inV=⋅⋅Then ( )()()23210.0088199 lb s /ft in42in0.88667 lb s /ftmπ⋅=⋅( )23220.0088199 lb s /ft in13in0.083126 lb s /ftm⋅=⋅( )()( )23230.0088199 lb s /ft in12in0.055417 lb s /ftm⋅=⋅Using Fig. 9-28 and the parallel theorem, have (a) ()( ) ( )123xxx xIIII=+−() () ()222211ft0.88667 lb s /ft3 42
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This note was uploaded on 07/11/2011 for the course EGM 2511 taught by Professor Jenkins during the Spring '08 term at University of Florida.