... gearscurvature, 22 7frequencies, 22 9reasons, 22 3 shapes, 22 4tip relief, 22 6tip stresses, 22 7Markermagnetic, 90once per rev, 90Matlab, 59Meshcycle, 1 32 stiffness, 14Microphone, ... 140Welbourn, 42 Pittingcause, 26 9vibrations, 23 4Planetary gearsdefinitions, 20 3 excitation phasing, 20 5frequencies, 20 8load sharing, 20 3 speed ratio, 20 9I.E. testing, 20 9unexpected ... loadingoil film, 30 , 40stresses, 30 Corner relief, 30 Correctionscrowning, 44helix, 44Coupling gear tooth, 26 8testing, 26 5 vibration, 26 6Crackingvibrations, 23 5Crest factor, 23 8Crowning,...