失谐叶盘结构振动模态局部化实验

基于实际叶盘结构失谐振动模态局部化能量集中的物理特性,以及基于优化方法提出了确定失谐叶盘结构最坏状态模态局部化的方法.通过数值算例表明,该方法可以有效定量确定失谐叶盘结构最坏情形模态局部化,发现失谐跳变模态局部化现象.利用搭建的失谐叶盘模态局部化实验系统,针对典型的整体叶盘结构模型试件进行了失谐振动模态局部化实验,通过实验验证了失谐跳变模态局部化现象,实验测量与理论计算结果得到了较好的相互印证. 

Experimental investigation of the worst-case mode localization for a mistuned bladed disk assemblies

Based on the vibration mode characteristics of mistuned bladed disk,the methods for analysis mode localization were presented to assess the worst-case mode localization of mistuned bladed disk,numerical example shows that the method presented is reliable and effective.An experimental investigation of a simple 12-bladed academic blisk was then presented.The purpose was to validate theoretical predictions about the occurrence of mistuning jump-localized modes and to gain greater insight into the mechanisms by which the phenomena occur.The experimental measurements of localized mode shapes were compared to predictions based on the finite element method.The experimental measurements were found to have excellent agreement with numerical simulation results.