Probability Distribution of Fatigue Strength of Rotor Blades (PROFAR):Publishable Final Report

摘要

In the period June 1997-July 2001 the EU funded project 'Probability Distributionof Fatigue Strength of Rotor Blades-PROFAR' was carried out. The main objective of this project is to get a deeper understanding of the blade to blade variation of the fatigue strength of rotor blades and to determine the statistical distribution function by which this variation can be described. Furthermore the project aimed at the determination and quantification of the correlation between the measured fatigue strength of rotor blades and coupon data. To achieve the project objectives 37 small-scale blades have been tested both static and in fatigue. Next to these blades, a number of coupons of identical material as that of the blades has been tested statically and under fatigue loading. The tests served two main purposes, finding the scatter in the blade properties and relating the coupon test data to actual failure of real blades. In order to serve these purposes the two different sets of tests were done.