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FREE VIBRATION ANALYSIS OF ROTATING FUNCTIONALLY GRADED (FG) THICK TIMOSHENKO BEAMS IS PRESENTED. THE MATERIAL PROPERTIES OF FG BEAM VARY ALONG THE THICKNESS DIRECTION OF THE CONSTITUENTS AC-CORDING TO POWER LAW MODEL. GOVERNING EQUATIONS ARE DERIVED THROUGH HAMILTONÂS PRINCIPLE AND THEY ARE SOLVED APPLYING DIFFER-ENTIAL TRANSFORM METHOD. THE GOOD AGREEMENT BETWEEN THE RESULTS OF THIS ARTICLE AND THOSE AVAILABLE IN LITERATURE VALIDATED THE PRE-SENTED APPROACH. THE EMPHASIS IS PLACED ON INVESTIGATING THE EFFECT OF SEVERAL BEAM PARAMETERS SUCH AS CONSTITUENT VOLUME FRACTIONS, SLENDERNESS RATIOS, ROTATIONAL SPEED AND HUB RADIUS ON NATURAL FREQUENCIES AND MODE SHAPES OF THE ROTATING THICK FG BEAM.
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