Dynamic Behavior of Planetary Gear : 3rd Report, Displacement of Ring Gear in Direction of Line of Action

Fault feature analysis of planetary gear system with tooth root crack and flexible ring gear rim

“…Later, they [7] investigated the deflections of a ring gear by finite element (FE) method and theoretical approach, respectively. Satoshi ODA et al [8] applied the FE method to study the root stress and the rim deformation of a thin-rimmed spur ring gear supported by pins.…”

A dynamic model to study the influence of planet position errors in planetary gears

“…Gear vibrations are primary concerns in these applications both in terms of dynamic forces and noise since dynamic loads increase the risk of tooth or bearing failures whereas noise can become a sensitive issue in helicopters for instance. A number of papers have been published on planetary gear dynamics which comprise lumped-parameter models [1][2][3][4][5][6][7][8][9][10] and deformable or hybrid models of varying complexity [11][12][13][14][15][16]. Modal analyses were performed by Saada and Velex [8], Parker et al [17][18][19][20] who emphasized the structured modal properties of single-stage drives and showed, for equally and unequally-spaced planets, that only planet, rotational and translational modes could exist.…”

“…Modal analyses were performed by Saada and Velex [8], Parker et al [17][18][19][20] who emphasized the structured modal properties of single-stage drives and showed, for equally and unequally-spaced planets, that only planet, rotational and translational modes could exist. The studies by Cunliffe et al [1], August and Kasuba [2], Hidaka et al [3][4][5][6][7], Kahraman [9], Velex et al [8], [10] involve planetary gear models to determine critical frequencies and dynamic responses. Hidaka et al [6] found that the phases between the planets could modify sungear trajectories and several studies (Seager [21], Parker [22], Parker et al [23,24]) confirmed the contribution of mesh phasing as well as the possibility of cancelling some frequency components of the global translational or torsional excitations on sun-gears and ring-gears.…”

Bidimensional Finite Element Analysis of Spur Gear: Study of the Mesh Stiffness and Stress at the Level of the Tooth Foot

“…Récemment, l'apparition des codes d'éléments finis a permis une approche plus générale des déformations élastiques des engrenages. De nombreux auteurs ont appliqué cette méthode, en particulier, Chabert [20], Hidaka [21], Wang [22], Velex [14] et Sinsot [23] en élasticité bidimensionnelle, Mathis [24] et Tobe [18,25,26] en élasticité tridimensionnelle. Dans ces travaux la déformation de voile (corps de la roue dentée) n'est pas prise en considération dans la détermination de la raideur d'engrènement.…”