Modal Analysis of Francis Turbine Blade Based on Fluid-Structure Interaction Theorem

摘要：

The paper deals with the modal analysis of Francis turbine blade with fluid-structure interaction (FSI).The dynamic equation of Francis turbine blade in air and operating flow path is studied,and two different governing equations are solved together.Then the mathematic model for vibration and stress analysis was built to calculation the natural frequency in air by using finite element analysis (FEA).In addition,the blade’s coupled modelling in operating flow path lies on a classical finite element discretization of the coupled fluid-structure equation.According to the analysis of result,the influential coefficients by the FEA adopted in the present study are in fairy good agreement with the experienced data listed in some documents.The modal analysis of the blade highlights that the natural frequencies decrease dramatically and the mode shapes in operating flow path are close to those in air.So the method presented herein can be used efficiently as a reliable tool for the fatigue reliability design and performance analysis of Francis Turbine blade.

关键词： fluid-structure interaction (FSI) modal analysis Francis turbine blade fatigue design check.

作者: Zhang Lixia Zhang Wei Yang Zhaohong Pan Jinluan

作者单位: Key Laboratory for Advanced Material Processing Technology,Ministry of Education,Department of Mecha Key Laboratory for Advanced Material Processing Technology,Ministry of Education,Department of Mecha Department of Information Engineering,Academy of Armored Force Engineering,Beijing,China

会议类型: 国际会议

会议名称: International Conference on Modelling,Identification and Control(模拟、鉴定、控制国际会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）