透平叶片振动激励系统设计与建模仿真

Design and modeling simulation of a vibration excitation system for turbine blades

为了监测预警叶片失稳颤振,防止因叶片颤振导致的事故发生,研究并设计出基于电磁激振力的叶片失稳颤振现象模拟装置。运用ANSYS进行电磁场分析,并以得到的最大电磁激振力为优化目标对该结构进行优化;然后通过分析叶片经过单组磁极时的激振力变化过程,对叶片进行模态和谐响应分析模拟。研究结果表明,本文所设计的激励装置可以控制产生不同的电磁激振力,从而能较好地模拟叶片的失稳颤振过程。

In order to monitor the instability flutter of a warning blade and prevent accidents caused by the blade flutter, an experimental device to model the flutter instability of a blade resulting from electromagnetic forces has been designed and studied. First, the electromagnetic field was analyzed by ANSYS. The optimal electromagnetic force was used as the optimization objective to optimize the structure. Then by analyzing the change of the exciting force when the blade passes through a single set of magnetic poles, the behavior of the blade was simulated and modeled by harmonic response analysis. The results show that the excitation device developed in this work can control the different electromagnetic forces and thus provide a realistic simulation of the vane instability flutter process.