Structural Testing and Analytical Research of Turbine Components
Abstract
Finite-element based deterministic and probabilistic analytical methods were applied for the normal mode and forced response characterization of simple-to-complex turbine and compressor components. Noncontacting blade deflection instrumentation - - four fiber optic plane-of-light sensors and dual Z-Grid wire systems were designed, built and tested for measuring blade tip deflections of rotating disks. Differential double pulse interferometry was applied for the mode shape definition of rotating bladed disks, and the full- field modal fringe patterns were quantitatively interpreted by the sine extrapolation technique. A joint effort for concurrent evaluation of the UTRC and UDRI non-interference blade measurement systems for measuring integral order vibration of a flexible disk was completed. Critical speeds and maximum blade tip deflections of a test disk from the two instrumentation systems were compared, and good agreement for the two test series results was seen. Results from the integrated NSMS(Noncontact Stress Measurement System) tests were also compared. The NSMS analysis software programs analyzed the optical probe array data and extracted blade-to-blade deflections and compared them with the interferometric data. Keywords: Probabilistic analysis; Data acquisition; Sensitivity; Finite element analysis; Vibration; Turbine compressor blades; Bladed-disk dynamics; Plane-of-light probes; Gridwire system; Mistuning. (EDC)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 02, 1989
- Accession Number
- ADA223516
Entities
People
- M. Swaminadham
Organizations
- University of Dayton