Parametric Modeling And The Finite Element Analysis Platform Development Of The Turbine Blade

The turbine blade is one of the important parts of the aircraft engine, whosefunction is to transform the energy of the high temperature gas into the rotormechanical work. When it works, it is not only surrounded by the constantlychanging high temperature gas but also bears the huge centrifugal pull, gas force andvibration load produced by high speed spinning. Hence, the working environment ofthe turbine blade is really bad and it is very important to analyze and optimize itsstructure.Based on the secondary developing function provided by UG andparameterization parts-library, this study adopts finite element analysis and VS2008programming language to develop the turbine blade’s structural designing platform,which has very strong practicability in the turbine blade’s modeling and finite elementanalysis. The contents of this study are as follows:With the aids of the secondary developing tools in UG/Open API, this researchestablishes the turbine blade’s parameterized parts-library so as to alter the turbineblade’s shape and size by virtue of the drive size parameters. The three-dimensionalmodeling design of the shroud, margin root, and rabbet is achieved by the expressionof the designing variables. In this way, the renewed models are obtained afterrenewing the parameters of the three-dimensional models. For the body of the blade,a new method of model forming is put forward, which ensures a smooth transitionamong the connecting points in the cross section and the accuracy of thethree-dimensional models. And the parametric modeling of the body is achieved bythe total program-controlled parametric modeling. After the establishing theparameterized parts-library of the turbine blade, the platform of the turbine blade’sparametric modeling is achieved through the menus, dialog boxes and other auxiliarydeveloping tools provided by UG. From this platform, the turbine blade’sthree-dimensional parameterized modeling can be obtained quickly.By NxOpen, a new developing tool based on UG, the program-controlled finiteelement modeling of the turbine blade is obtained. This program also has other functions, such as changing of the material parameters, automatic meshing, and thechanging of the boundary conditions. The boundary conditions include turbineblade’s centrifugal pull, the body’s aerodynamic load and displacement constraintwhile it is spinning. The programs are encapsulated in means of VS2008and,combined with the auxiliary developing tools of UG, the parameterized finite elementanalysis platform of the turbine blade is established, on which the finite elementanalysis of the turbine blade in different numerical loads can be obtained fast.In conclusion, this research conducts an investigation into the turbine blade’sparameterized modeling, the finite element and the platform construction based onUG and lays a foundation for the following optimization of the turbine blade.