Dynamic Characteristics Analysis and Optimization Design of a Simulated Power Turbine Rotor Based on Finite Element Method

Abstract

The vibration optimum design for a simulated power turbine rotor without blades on the disk by using an optimization method based on the finite element method is described in this paper. The installation position of the two-stage turbine disks is chosen as design variables under the constraints of feasible regions for the critical speeds of the rotor. The objective functions are to minimize the transient response of the acceleration at the bearings and the amplitude of the disks. Predictions of the dynamic characteristics of the rotor are obtained by using ANSYS code. The optimization problem is solved by using commercial optimization code ISIGHT. The optimum installation position of the two-stage turbine disks is determined after optimization design. Experimental tests under the optimized structure show that the amplitude of the two-stage turbine disks which are recognized as the most concerned optimization objectives are reduced by 59 % and 56 % respectively in comparison with the comparative structure. The encouraging results demonstrate the potential of the presented method as an engineering design tool and also lay a foundation for the design of the real power turbine rotor used in turbo-shaft engine.

Experimental Fitting of Redesign Electrified Turbocompressor of a Novel Mild Hybrid Power Train for a City Car

“…The shaft has been discretized with hexa8 ele-ments (8 nodes) with the subdivision into 208,897 elements and 218,730 nodes (Figure 6). To simulate the presence of the electric motor rotor and compressor wheel, rbe3 elements (orange in Figure 7) were used, in which nodes there is a 0D concentrated conm2 element that has the mass and inertia properties [15,16] of the objects it represents (in red in Figure 8). Table 3 shows the rotor data subsequently produced, while Table 4 the compressor ones.…”

Optimization design of rotor system with squeeze film damper

“…Due to the fact that this method is based on two mature and widely used software, it can be used as a general method for optimizing the design of rotor systems. Reference [13] used this method to optimize the design of a power turbine rotor of turboshaft engines, demonstrating the practicality and effectiveness of this method.…”