ANALYSIS FOR TYPICAL STATOR BLADE STRUCTURE AND ITS IMPLEMENTATION

A program named the STAP for the stator blade analysis with preprocessor and postprocessor is briefly introduced.Using the mesh generation and substructure assemblage functions of the STAP,it is possible to accomplish conveniently the stress and vibration analyses of the stator blade if only the coordinates of points on the contour of a blade and a few of mechanical properties of materials are inputted.Since mechanical properties,particularly Youngs modulus and coefficient of thermal expansion,are temperature dependent,it is very important to take this fact into account for calculating the stress of a cooled gas turbine blade.For this end the STAP provides for user a finite element methed with a temperature dependence on the properties.In structure modelling,in order to reduce the number of unknown variables and to describe the complex boundary conditions,the STAP is possessed of the function of Master Slave relations between the nodal displacements.