Abstract
It is well known that asymmetric vane spacing can result in
decreased levels of the excitation at specific frequencies. In this
paper, the resonant response reduction of mistuned bladed disks
due to asymmetric vane spacing is studied theoretically for the most
probable asymmetric vane, in which the vane count of the upper
and lower half is slightly different. First, a method for predicting
the maximum amplitude of the mistuned bladed disk for the
asymmetric vane spacing is proposed. Second, a parametric study is
carried out using Monte Carlo simulation to clarify the vibration
response characteristics of the mistuned bladed disk for the
asymmetric vane spacing. From these results, it is concluded that
asymmetric vane spacing is effective for reduction of resonant
amplitudes of a mistuned bladed disk if a multi-resonance phenomenon
does not appear.
