you are here:   / Resources / Three Dimensional Parametric Spline Modeling System

Three Dimensional Parametric Spline Modeling System

In the aircraft gas turbine engine industry, analysis plays a major role in the up-front development effort of an engine component. Time savings early on in the design/analysis phase of development can reap big rewards in terms of time-to-market.

With this goal in mind, a major gas turbine manufacturer asked CAE Associates to develop an automated procedure for analysis of spline couplings. These components are used to transfer power between different shafts in the engine and are considered critical in terms of structural integrity and life of the engine. An accurate analysis of these components is essential if the engine is to meet its design goals.

The automated procedure developed by CAE Associates uses parameters to define the geometry of the coupling. The ANSYS GUI has been modified to accept these parameters as input via pop-up menus. A separate graphics window appears for each menu, clearly describing the parameter definition. After all input has been specified the spline geometry is generated automatically and a 3-D finite element model of the coupling is created, including generalized contact between teeth. Loads are applied, the nonlinear contact analysis is performed automatically, and postprocessing files are generated for review. These steps occur without user intervention, allowing a non-expert ANSYS user to perform very complicated analysis.

This automated procedure allows a design to be analyzed in days, as compared to weeks if each design were analyzed manually. The fast turnaround time gives the designer more flexibilty to review different options and produce an optimal design.