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• W4328051198 endingPage "110298" @default.
• W4328051198 startingPage "110298" @default.
• W4328051198 abstract "When a turboshaft engine operates in harsh environments such as deserts, plateaus, and coastal areas, the erosion damage to compressor blades leads to uneven mass distribution of the blade disk of the gas generator and further induces unbalance fault vibration of the rotor system, which seriously endangers helicopter flight safety and mission execution. The vibration characteristics of the rotor system of the gas generator of an aero-turboshaft engine under blade erosion damage are studied innovatively in this paper. The theoretical formula for the blade erosion damage depth is derived. The key parameters for the calculation of the erosion damage to the blades are obtained by combining the particle impact velocity test, Ti-6Al-4 V alloy erosion wear test, and finite element analysis. A new data extraction method for erosion damage based on distribution characteristics and the sparseness–denseness path (DC-SP) is proposed. The unbalance fault mechanism of the rotor system caused by erosion damage is revealed. Using a turboshaft engine as an example, a dynamic model of the rotor system of a gas generator is developed. Unbalance load samples caused by erosion damage are applied, and the whirl trajectory and vibration spectrum characteristics of the rotor system analyzed. The results show that the unbalance magnitude of 1-stage and 3-stage rotor blades caused by erosion damage is 2.33 times and 1.22 times that of 2-stage rotor blades, respectively. The vibration response of the supporting position of the rotor changes with the unbalance phase difference of the rotor blade disk. The vibration amplitude of the supporting position is the lowest when the unbalance phase difference is 0°-180°-180° and is the highest when the unbalance phase difference is 0°-0°-0°. At design speed, the vibration amplitude fluctuation range of the left side of the supporting position is concentrated, whereas that of the right side is large. When the unbalance magnitude increases from 20 to 120 g·mm, the vibration amplitudes of the left and right sides of the supporting position increases by 97% and 263%, respectively." @default.
• W4328051198 created "2023-03-22" @default.
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• W4328051198 date "2023-07-01" @default.
• W4328051198 modified "2023-10-16" @default.
• W4328051198 title "Erosion-damage-induced vibration response of aero-gas generator rotor system" @default.
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• W4328051198 doi "https://doi.org/10.1016/j.ymssp.2023.110298" @default.
• W4328051198 hasPublicationYear "2023" @default.
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