Research Article
Extraction of Features due to Breathing Crack from Vibration Response of Rotated Blades considering Tenon Connection and Shroud Contact
Table 1
Parameters of the bladed disk.
| | Symbols | Properties | Value |
| | L | Length of a blade trunk (mm) | 95 | | H | Thickness of a blade trunk (mm) | 2.5 | | W | Width of a blade trunk (mm) | 45 | | R | Radius of a disk (mm) | 200 | | N | Total number of blades | 12 | | E0 | Order of airflow force | 1 | | D | Rotating speed (rpm) | 5000 | | f0 | Amplitude of airflow force (N) | 30 | | E | Young’s modulus (Pa) | | | Poisson’s ratio | 0.33 | | Material density of a blade trunk (kg/m3) | 2800 | | Damping ratio | 0.01 | | mt | Mass of a tenon (kg) | 0.0272 | | ct | Damping of a tenon () | 0.1445 | | kt | Stiffness of a tenon (N/m) | 903480 | | kg | Coupling stiffness of tenons (N/m) | 361392 | | Friction coefficient of tenon connection | 0.5 | | Nt | Normal load on tenon bottom surface (N) | 20 | | Friction coefficient of shroud contact | 0.5 | | Ns | Normal load on shroud contact interface (N) | 10 | | ks | Stiffness of shroud damping (N/m) | 10000 |
|
|
