Improved Method of Measuring Blade Vibration and Predicting Engine Durability

摘要

This work seeks to establish the ability of an analytical model to predict the scatter in peak blade vibration amplitudes that occurs on bladed disk assemblies during tests of gas turbine engines. It then uses the resulting analytically generated statistics to investigate methods for selecting the number of blades that should be instrumented on a stage and methods for selecting which blades should be instrumented. In addition, it provides a method for calculating stage durability from the resulting test data. Keywords: Gas turbine blade vibration; Mathematical prediction; Mistuning; Optimizing instrumentation. (edc)