Effects of multistage coupling and disk flexibility on mistuned bladed disk dynamics

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	Effects of multistage coupling and disk flexibility on mistuned bladed disk dynamics
	BLADH R. ; CASTANIER M. P. ; PIERRE C.
刊名	Journal of engineering for gas turbines and power
	2003
卷号	125 期号:1 页码:121-130
关键词	Sensitivity analysis Finite element method Numerical method Modeling Defect Rotating disk Multistage Multistage apparatus Turbine blade Gas turbine Mode coupling Natural frequency Forced vibration
合作状况	其它
中文摘要	The effects ofdisk flexibility and multistage coupling on the dynamics of bladed disks with and without blade mistuning are investigated. Both free and forced responses are examined using finite element representations of example single and two-stage rotor models. The reported work demonstrates the importance of proper treatment of interstage (stage-to-stage) boundaries in order to yield adequate capture of disk-blade modal interaction in eigenfrequency veering regions. The modified disk-blade modal interactions resulting from interstage-coupling-induced changes in disk flexibility are found to have a significant impact on (a) tuned responses due to excitations passing through eigenfrequency veering regions, and (b) a design's sensitivity to blade mistuning. Hence, the findings in this paper suggest that multistage analyses may be required when excitations are expected to fall in or near eigenfrequency veering regions or when the sensitivity to blade mistuning is to be accounted for Conversely, the observed sensitivity to disk flexibility also indicates that the severity of unfavorable structural interblade coupling may be reduced significantly by redesigning the disk(s) and stage-to-stage connectivity. The relatively drastic effects of such modifications illustrated in this work indicate that the design modifications required to alleviate veering-related response problems may be less comprehensive than what might have been expected.
收录类别	其他
语种	英语
公开日期	2010-05-13
内容类型	期刊论文
源URL	[http://124.16.136.157/handle/311060/1338]
专题	软件研究所_软件所图书馆_期刊论文
推荐引用方式 GB/T 7714	BLADH R.,CASTANIER M. P.,PIERRE C.. Effects of multistage coupling and disk flexibility on mistuned bladed disk dynamics[J]. Journal of engineering for gas turbines and power,2003,125(1):121-130.
APA	BLADH R.,CASTANIER M. P.,&PIERRE C..(2003).Effects of multistage coupling and disk flexibility on mistuned bladed disk dynamics.Journal of engineering for gas turbines and power,125(1),121-130.
MLA	BLADH R.,et al."Effects of multistage coupling and disk flexibility on mistuned bladed disk dynamics".Journal of engineering for gas turbines and power 125.1(2003):121-130.