Turbine Disc Analysis Checklist
Checklist for turbine disc structural analysis covering bore stress, rim load, thermal stress, fatigue and creep.
Stress
- Bore hoop stress with stress concentration at features
- Rim stress with blade pull and slot concentration
- Thermal stress from radial temperature gradient
- Combined stress (centrifugal + thermal + blade pull)
Overspeed
- Nonlinear elastic-plastic analysis at overspeed
- Bore stress vs yield at overspeed temperature
- Plastic strain within allowable
- Burst margin computed
Life
- LCF at bore with stress concentration and transient thermal
- HCF from disc modal response
- Creep at rim (highest temperature)
Bore interface
- Interference maintained at max speed
- Bore closure from creep over design life