Analysis on Multi-order Static Frequency of Last Stage Long Blade of 1000MW Ultra Supercritical Turbines

Turbine blade vibration is the main problem in turbine blade operation.To guarantee safety operation of turbine unit,the static frequency of all orders of each newly manufactured moving blade should be measured and adjusted.Taking the 1 146 mm last stage long blade as an example,specific calculation method for every order of turbine blade static frequency is being presented,while its structure described and vibration characteristics analyzed.