期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 146, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2020.106955
关键词
Lacing wire; Shaft-disk-blade; Coupling modal characteristics; Mistuning
资金
- National Natural Science Foundation of China [51575093]
- Fundamental Research Funds for the Central Universities [N180313008, N182410007-06, N170308028]
The study developed a blade-disk-shaft coupling model to interpret the effects of tuned/mistuned lacing wire on coupled modal properties. Model validation showed improved accuracy over previous models. Analysis focused on the effects of varying lacing wire location and stiffness ratio on coupling behavior, introduced a mistuning severity factor, and examined the sensitivity of mode frequencies to lacing wire damage. The study provides insights for mistuning identification in the shaft-disk-blade packet system.
Present work has further developed a packet blade-disk-shaft coupling model based on previous work to interpret the effects of tuned/mistuned lacing wire on the coupled modal properties. In the developed model, the flexible bladed disk system's swing motion inducing by shaft bending is further considered. Corresponding model validation indicates that the improved model is more accurate than our previous model. Present analysis has three parts: in the first part numerical results focus on the effects of varying lacing wire location (X-L) and stiffness ratio (K-L) on the coupling behavior between subcomponents. As the lacing wire participating in the coupling vibration, the SDB, DB2, and BB mode shift to LSDB, LDB2, and LB mode, while the TDB mode keeps in constant. The frequency values of new coupling modes conspicuously increase, altering the order of occurrence of the dominant modes as well as the patterns of coupling modes. In the second part, a mistuning severity factor has been introduced to represent the lacing wire damage level and its effects on different coupled modes are summarized clearly. Then further analysis points out that the sensitivity of mode frequencies to lacing wire damage depends on a series of factors. The conclusions can provide a reference for the mistuning identification in the shaft-disk-blade packet system. Finally, the effects of rotational speed on the tuned/mistuned shaft-disk-blade packet are compared and depicted in the Campbell diagram. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据