Abstract
In this paper the flange coupling without clearance will be analyzed using CATIA Generative Structural Analysis workbench. The structural analysis procedure will be presented: creating the 3D model, configuring the mesh, applying the restraints, applying the loads (torque), applying the interaction conditions (driving flange-bolts and nuts, bolts and nuts-driven flange), running the numerical analysis and results visualization. Two different systems will be analyzed: the first is a six bolts flange coupling working in nominal conditions, the second is a five bolts flange coupling working in some failure conditions with only five bolts distributed in a six holes flange coupling. In certain conditions the flange coupling design allows the same torque to be transmitted by six, but also by only five bolts. However, the non-uniformity of the five bolts distribution around the six holes flanges will generate some other unwanted phenomena. In this case all the stress and deformations will be non-symmetrically and for the flange coupling that is a rotating coupling this can be one reason for beats phenomenon.
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