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.

1.
D. S.
,
1966
, “
Effect of Mistuning on the Vibration of Turbomachine Blades Induced by Wakes
,”
Jour. Mech. Eng. Sci.
, Vol.
8
, pp.
15
21
.
2.
D. S.
,
1976
, “
Effect of Mistuning on Forced Vibration of Blades With Mechanical Coupling
,”
Jour. Mech. Eng. Sci.
, Vol.
18
, pp.
306
307
.
3.
Yiu, H., 1991, “A Review of the Literature on Mistuning Effects in Bladed Disc Vibration,” Report No: VUTC/E/92001, Imperial College, London.
This content is only available via PDF.