Methods and systems for assessing residual life of turbomachine airfoils
US9103741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2010 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Nov 17, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods, systems and computer program products for assessing residual life of an airfoil, which would experience high cycle fatigue failure under at- or near-resonance vibration condition, are provided. The method includes receiving, at a processing system, at least one vibration response parameter associated with the airfoil. The method processes at least one cracked airfoil finite element model. Processing the cracked airfoil finite element model includes accessing the cracked airfoil finite element model, computing a modal stress intensity factor (SIF) of the cracked airfoil finite element model using fracture mechanics based finite element analysis, and computing a vibratory SIF based, at least in part, on the modal SIF and the at least one vibration response parameter. The method then computes a residual life indicator of the airfoil based, at least in part, on the vibratory SIF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.