Vibration characteristics analysis of mistuned bladed disk system based on mobile interface prestressed CMS super-element method

• Main Authors: Liang Zhang, Yuan He, Huiqun Yuan, Xin Li
• Format: Article
• Language: English
• Published: JVE International 2018-11-01
• Series: Journal of Vibroengineering
• Subjects: mistuned bladed disk system; mobile interface prestressed; CMS super-element method; vibration characteristics
• Online Access: https://www.jvejournals.com/article/19458

A new mobile interface prestressed component mode synthesis (CMS) super-element method is proposed with the mobile interface prestressed and free interface super-element approach. Analysis accuracy of this method is verified by the cyclic symmetry analysis method and the direct method. The mistuning parameter of real blades is identified by modal testing and finite element method, and the vibration characteristics of the real mistuned bladed disk system are analyzed based on the mobile interface CMS method. The results showed that the maximum relative error of the dynamic frequency of tuned and mistuned examples are 0.0043 % and 0.1466 %, respectively, which can be to meet the requirement of analytical precision. Compared with the cyclic symmetry analysis method, direct method and fixed interface prestressed CMS super-element method, this method is more suitable for analyzing the vibration characteristics of arbitrary mistuned bladed disk system.