Finite Element Modeling and Simulation for Shape Design of a Super High-speed Rotating-Shaft Using Design of Experiment

摘要

In the design of modern rotating machinery, it is often necessary to increase the performance of rotor-bearing system. Since a critical speed range influences the performance and safety of the whole system, it should be necessary to constrain the critical speed and thus resonance response in design process to result in large vibration. Consequently the minimization of resonance response amplitudes within the operation range of the rotor system becomes the most primary design objective. This paper presents the finite element modeling and simulation including the analysis of dynamic characteristics of a super high-speed rotating-shaft with a built-in motor. In simulation for the finite element modeling of rotating-shaft, Design of Experiment (DOE) is used to find out the best values of inner diameters at five locations, in terms of the maximization of the 1st critical speed apart from the operation range of rotating-shaft.