失谐叶盘结构减振问题研究综述

Research overview on vibration damping of mistuned bladed disk assemblies

叶盘结构是航空发动机、燃气轮机的重要零部件,在工程实际中应用广泛。失谐普遍存在于叶盘结构中,并且会破坏叶盘系统原有的振动特性,是导致叶盘高周疲劳失效的原因之一,因此研究如何降低叶盘结构振动是非常有必要的。在梳理国内外相关研究的基础上,介绍了叶盘结构失谐振动的机理,归纳了失谐叶盘系统减振的主要技术方法,如人为主动失谐、碰撞阻尼、摩擦阻尼、优化叶片安装排序减振等,提出了今后的一些研究方向。

Bladed disk assemblies are very important parts in auto engine and gas turbine,and is widely used in practical engineering.The mistuning existing commonly in the bladed disk assemblies can destroy the vibration characteristics of the bladed disk assemblies,which is one of the reasons for the high cycle fatigue failure of bladed disk assemblies,so it is necessary to research how to reduce the vibration of the bladed disk assemblies.On the basis of the review of relevant research at home and abroad,the mistuning vibration mechanism of the bladed disk assemblies is introduced,and the main technical methods of the vibration damping of bladed disk assemblies are reviewed,such as artificially active mistuning,collision damping,friction damping and optimization of the blade position.Some future research directions are presented.