Nueva metodología para el análisis de sistemas mecánicos utilizando modelos a escala y leyes de similitud

Abstract

 The failures, unexpected and catastrophic, are presented in 
large mechanical systems, specifically, in the electric power 
generation. The development of new methodologies of 
analysis and research to evaluate and calculate useful life 
must be proposed. In this work, an analytical-experimental 
novel methodology was developed using laws of similarity 
and models at the scale of prototypes, parts or mechanical 
components of any system. The methodology developed in the 
dynamic study of steam turbine blades was applied to calculate 
their stresses, deformations and the prediction of their useful 
life in mechanical fatigue conditions. The analytic-experimental 
and numerical results showed a relative error of less than 
3,16% for both models. The new methodology was validated 
with these results. The use of scale models with the application 
of similarity laws will be of help in the analysis of failures 
where due to the size or high costs, real systems cannot be 
analyzed.