Advanced ultrasonic blade root examination Analytical process and Modelling to handle examination on complex geometry

摘要

Blade roots are of the most stressed areas of a rotor in service. An in-service examination, whether performed manually or automated, is complex due to the geometries involved. The levels of probability of detection, repeatability, reliability are consequentially affected. The work is thus time consuming and impacts outage durations. This paper describes a way to handle and set this kind of examination on complex geometries. From the scope of examination and associated conditions, through to mathematical software (MapleSoft) and physical modelling tool (CIVA). The entire package (physical and mechanical) is completely pre-designed and evaluated prior to implementation. Advanced UT technologies are used to ensure efficiency, reliability, scanning simplification and shortest possible inspection duration.