Tuning Aircraft Engines with Rotor Dynamics Simulation 2019-01-1366
It is typical in aircraft engine design to explore new configurations in a constant effort to achieve greater efficiency with respect to various considerations. An integral component of this process requires a complete and robust simulation of rotor dynamics. Tuning the design with results of rotor dynamics simulation can be made possible with a tool that has adequate modeling techniques to capture the physics associated with engine behavior under various operating conditions accurately.
Altair OptiStruct is a general-purpose modern finite-element based structural solver, which includes amongst several of its capabilities, a new rotor dynamics suite of functionalities. This suite allows for the analysis of structures with rotors regarding the following solution sequences: Static Solutions, complex eigenvalue analysis and a dynamic analysis in either the frequency or time domain. Each of these analyses are a key step in assessing and determining the integrity of rotor structures, which will ultimately help in tuning the design.
In this paper we will showcase a frame work including the methods developed for the aircraft engine to conduct rotor dynamics analysis. As an initial step, the results for various solution modules are validated against the well-established results of the Jefcott and Nelson-McVaugh rotors with respect to the quality and performance of the simulation.