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|All Authors / Contributors:||
Mohamed Maatar; Louis Flamand; Institut national des sciences appliquées (Lyon).; LMC - Laboratoire de Mécanique des Contacts (Lyon, INSA).; École Doctorale Mécanique, Energétique, Génie Civil, Acoustique (MEGA).
|Notes:||Sources : formulaire d'enregistrement et annonce de soutenance.|
|Description:||1 vol. (150 p.) : ill. ; 30 cm.|
|Responsibility:||par Mohamed Maatar ; sous la direction de prénom nom dir.|
A systematic approach for analyzing the contribution of shape deviations and mounting errors on gear dynamics is proposed. Co1_1tact conditions for bath rigid and deformable solids are used for defining the excitations of the gear unit. A three dimensional lumped parameter non linear dynamic model with a foundation model for tooth contacts is set up. The contact problem and the equations of motion are simultaneously solved using an original iterative method combining a time step integration and a normal contact algorithm. Comparisons with some experimental evidence and several results of the literature illustrate the interest and the versatility of the procedure. The model is sued for characterizing the influence of shape defects and mounting errors such as flank undulations, tooth spacing errors, eccentricities and misalignment on tooth loads and transmission errors. The role of tooth profile modifications is carefully analyzed, it is demonstrated that long reliefs can substantially improve spur and helical gear dynamic behavior on a given load range. Finally, it is shown that inevitable defects and det1ections of the geared unit may strongly reduce the expected gain in dynamic transmission error.