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Dynamic Characteristics Analysis and Experiment of Cantilever Turbopump Rotor in Rocket Engine
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Weijian NIE1, 2, Hubiao TANG1, Weidong MA1
Missiles and Space Vehicles | 2026, 49(2) : 45 - 51
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Missiles and Space Vehicles | 2026, 49(2): 45-51
• Propulsion •
Dynamic Characteristics Analysis and Experiment of Cantilever Turbopump Rotor in Rocket Engine
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Weijian NIE1, 2, Hubiao TANG1, Weidong MA1
Affiliations
  • 1.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou, 412002
  • 2.Research Center for Aero-engine Vibration Discipline and Technology, Zhuzhou, 412002
Published: 2026-04-25 doi: 10.7654/j.issn.2097-1974.20260206
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To study the dynamic characteristics of the cantilever turbopump rotor in rocket engines, finite element models of the rotor dynamic characteristics are established using 3D solid elements and 2D beam elements to conduct dynamic characteristic analysis. The sensitivity of the impeller and turbine to unbalance on the rotor is obtained. High speed dynamic balance tests of the rotor are conducted on a high-speed rotating tester, and the results show that the finite element model well reflects the true dynamic characteristics of the rotor, with a calculation error of no more than 5%. Compared with 2D beam element model, the calculation accuracy of the 3D solid elements model is higher. The rotor is most sensitive to the imbalance on the turbine, providing a theoretical reference for high-speed dynamic balancing test. After high-speed dynamic balancing, the amplitude reduction of the rotor at critical speed is not less than 70.27%, and the reduction of elastic support stress is not less than 84.38%, indicating good dynamic balancing effect. The research provides a reference for the analysis of the dynamic characteristics of the rotor of a large cantilever turbopump and high-speed dynamic balancing tests.

rocket engine  /  cantilever turbopump rotor  /  dynamic characteristics  /  high-speed dynamic balance
Weijian NIE, Hubiao TANG, Weidong MA. Dynamic Characteristics Analysis and Experiment of Cantilever Turbopump Rotor in Rocket Engine[J]. Missiles and Space Vehicles, 2026 , 49 (2) : 45 -51 . DOI: 10.7654/j.issn.2097-1974.20260206
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Year 2026 volume 49 Issue 2
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Article Info
doi: 10.7654/j.issn.2097-1974.20260206
  • Receive Date：2025-05-26
  • Online Date：2026-05-12
  • Published：2026-04-25
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  • Received：2025-05-26
  • Revised：2025-09-19
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Affiliations
    1.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou, 412002
    2.Research Center for Aero-engine Vibration Discipline and Technology, Zhuzhou, 412002
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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