58722 - Effect of Bladed Packets on Transient Vibration Localization Behaviors of Mistuned Whole Bladed Disk System 

The multi-packets whole bladed disks are usually used in the turbo-machineries. The most prominent characteristics of the multi-packets whole bladed disk is that some blade are connected by lacing forming a bladed packet, and several bladed packets are assembled to form a multi-packets whole bladed disk system. Mistuning of blades is an attractive vibration subject due to vibration localization problem that vibration energy focuses on some blades. The vibration localization characteristics of steady state of bladed disk are mainly discussed in previous studies, and few works focus on the transient vibration localization behaviors of the multi-packets whole mistuned bladed disk. Transient vibration characteristics of bladed disk are vital during start-up. Therefore, in this paper, transient vibration characteristics of the multi-packets whole bladed disk are studied. A developed model is used to calculate the transient vibration response of the multi-packets whole bladed disk. The number of bladed packets on the transient vibration localization of the multi-packets mistuned whole bladed disk is discussed. The results indicate that the bladed packets are able to reduce the transient vibration localization. The results indicate that the bladed packet is a promising approach to overcome the vibration localization of mistuning. Moreover, the different number of bladed packets will produce various behaviors of transient vibration localization of multi-packets whole mistuned bladed disk system.