The Maximum Factor by Which Forced Vibration of Blades Can Increase Due to Mistuning
- 1 January 1998
- journal article
- Published by ASME International in Journal of Engineering for Gas Turbines and Power
- Vol. 120 (1), 115-119
- https://doi.org/10.1115/1.2818061
Abstract
In 1966 it was shown that the maximum factor by which the amplitude of forced vibration of blades can increase due to mistuning is, with certain assumptions, 1/2(1+N), where N is the number of blades in the row. This report gives a further investigation of the circumstances when this factor can be obtained. These are small damping, and a relationship must hold between the mistuning distribution γ(s) and the interblade coupling function c(r), where r is the model number. The mistuning distribution must be symmetric about the blade on which maximum amplitude is to occur, s = 0. The coupling function must be symmetric about r = R, where R is the mode number of the excitation. If the coupling is purely mechanical, additional conditions apply. The coupling function c(r) must consist of a number of identical symmetric substrips. A 1976 result for mechanical coupling is amended.Keywords
This publication has 2 references indexed in Scilit:
- Research Note: Effect of Mistuning on Forced Vibration of Blades with Mechanical CouplingJournal of Mechanical Engineering Science, 1976
- Effect of Mistuning on the Vibration of Turbo-Machine Blades Induced by WakesJournal of Mechanical Engineering Science, 1966