Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
| public:modeles:rotor_55:accueil [2023/04/06 15:20] – solenekojtych | public:modeles:rotor_55:accueil [2024/07/30 12:17] (Version actuelle) – [Natural frequencies] rafaelbarraud | ||
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| Ligne 27: | Ligne 27: | ||
| {{ : | {{ : | ||
| - | < | + | < |
| - | < | + | * < |
| author | author | ||
| title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
| - | note = {\href{https:// | + | year = {1975}, |
| + | url = {https:// | ||
| </ | </ | ||
| Ligne 38: | Ligne 39: | ||
| * [[https:// | * [[https:// | ||
| * {{ : | * {{ : | ||
| - | * {{ : | + | * {{ : |
| </ | </ | ||
| Ligne 59: | Ligne 60: | ||
| ^ aspect ratio | [-] | 1.43 | | ^ aspect ratio | [-] | 1.43 | | ||
| ^ number of blades | ^ number of blades | ||
| - | ^ rotative | + | ^ nominal rotation |
| ==== Material properties | ==== Material properties | ||
| - | The original material of the rotor 55 is not defined in the NASA report. | + | The original material of the rotor 55 is not defined in the NASA report. |
| - | + | ||
| - | Considered properties: | + | |
| ^ | ^ | ||
| Ligne 101: | Ligne 100: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 | 1B | | + | | 1 | 1B | 2781.10 | 442.63 | |
| - | | 2 | 2B | | + | | 2 | 2B | 7272.47 |
| - | | 3 | 1T | | + | | 3 | 1T | 10993.56 |
| + | ====Campbell diagram==== | ||
| + | Evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed, for the mesh computed with OpenMCAD[(cite: | ||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| ===== Initial blade ===== | ===== Initial blade ===== | ||
| Ligne 121: | Ligne 127: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 | 1B | 2773.988 | 441.494 | | + | | 1 | 1B | 2773.99 | 441.49 | |
| | 2 | 2B | 7262.86 | | 2 | 2B | 7262.86 | ||
| | 3 | 1T | 10987.09 | | 3 | 1T | 10987.09 | ||
| Ligne 129: | Ligne 135: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 | 1B | 2774.422 | 441,563 | | + | | 1 | 1B | 2774.42 | 441,56 | |
| | 2 | 2B | 7266.25 | | 2 | 2B | 7266.25 | ||
| - | | 3 | 1T | 10995.95 | + | | 3 | 1T | 10995.95 |
| - | | + | |
| + | |||
| + | |||
| + | ====Campbell diagram==== | ||
| + | Comparison of the evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed for the initial and the reference blade: | ||
| + | |||
| + | {{ : | ||
| + | |||
| + | |||
| + | < | ||
| + | |||
| + | initial blade (orange), reference blade (gray) </ | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| Ligne 162: | Ligne 181: | ||
| {{ : | {{ : | ||
| - | < | + | < |
| - | < | + | * < |
| author | author | ||
| title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
| - | note = {\href{https:// | + | year = {1975}, |
| + | url = {https:// | ||
| </ | </ | ||
| Ligne 195: | Ligne 215: | ||
| ^ allongement | ^ allongement | ||
| ^ nombre d' | ^ nombre d' | ||
| - | ^ vitesse de rotation | + | ^ vitesse de rotation |
| ==== Propriétés matériau | ==== Propriétés matériau | ||
| - | Le matériau original du rotor 55 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 55 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v |
| - | + | ||
| - | Propriétés considérées : | + | |
| ^ | ^ | ||
| Ligne 233: | Ligne 251: | ||
| Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | ||
| + | |||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | 1T | | + | | 3 | 1T | 10993, |
| + | ====Diagramme de Campbell==== | ||
| + | Évolution des fréquences propres des 3 premiers modes, en fonction de la vitesse de rotation, pour le maillage obtenu avec OpenMCAD[(cite: | ||
| + | {{ : | ||
| + | < | ||
| + | * {{ : | ||
| + | * {{ : | ||
| + | |||
| + | |||
| + | |||
| ===== Aube initiale ===== | ===== Aube initiale ===== | ||
| Ligne 252: | Ligne 280: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| | 3 | 1T | 10987, | | 3 | 1T | 10987, | ||
| Ligne 260: | Ligne 288: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| | 3 | 1T | 10995, | | 3 | 1T | 10995, | ||
| + | ====Diagramme de Campbell==== | ||
| + | Comparaison de l' | ||
| + | |||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | aube initiale (orange), aube de référence (grise)</ | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| </ | </ | ||
| </ | </ | ||