摘要
叶片随机失谐对叶盘动力特性具有重要影响,导致叶盘系统模态局部化和受迫响应的急剧增大。文章针对叶片随机失谐,利用Monte Carlo分析方法,研究失谐叶盘结构模态局部化特性以及不同系统频率下的共振响应特性。随机失谐分布采用质量失谐和刚度失谐两种形式,着重分析其对叶片占优系统模态族的局部化程度、相应失谐共振响应及其最大振幅放大因子的影响规律。研究结果表明,失谐对叶盘低阶弯曲模态族的局部化程度影响最大,对应的最大振幅放大因子也相应较大。
Aim.The second paragraph of the introduction of the full paper points out what we believe to be the shortcomings of Refs.2 through 5;so,we propose investigating further.Sections 1,2 and 3 explain the results of our investigation.The core of section 2 is that we use the Monte Carlo method to study the mode localization characteristics of a disk with randomly mistuned blades under the condtions of mass mistuning and stiffness mistuning respectively,focusing on the blade-dominated mode.The core of section 3 consists of：（1） we investigate statistically the resonant response characteristics of a disk with randomly mistuned blades under the conditions of mass mistuning and stiffness mistuning respectively;（2） we study the influence of blade mistuning on the resonant response of the disk with the maximum amplitude magnification factor.The simulation results,given in Figs.3 through 12,and their analysis show preliminarily that blade mistuning has the greatest influence on the low-order flexible mode localization,thus increasing the maximum amplitude magnification factors of blades.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2011年第2期189-193,共5页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(50775181)资助
关键词
叶盘结构
随机失谐
共振特性
MONTE
Carlo
振幅放大因子
resonance
turbomachine blades
Monte Carlo methods
disk
randomly mistuned blade
resonant response
maximum amplitude magnification factor
