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Higher order extra trial weight-free balancing method for flexible rotors with initial bending
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Zhenhong DENG1, Huageng LUO1, Wangqun DENG2, 3, Weijian NIE4, Haidong LIN1, Baoqiang ZHANG1
Journal of Vibration Engineering | 2025, 38(9) : 2080 - 2087
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Journal of Vibration Engineering | 2025, 38(9): 2080-2087
Higher order extra trial weight-free balancing method for flexible rotors with initial bending
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Zhenhong DENG1, Huageng LUO1, Wangqun DENG2, 3, Weijian NIE4, Haidong LIN1, Baoqiang ZHANG1
Affiliations
  • 1.School of Aerospace Engineering, Xiamen University, Xiamen 361102, China
  • 2.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China
  • 3.Key Laboratory of Aero-engine Vibration Technology, Aero Engine Corporation of China, Zhuzhou 412002, China
  • 4.School of Energy and Power Engineering, Beihang University, Beijing 100191, China
Published: 2025-09-10 doi: 10.16385/j.cnki.issn.1004-4523.202309055
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It is often difficult to suppress vibration of flexible rotors at high-order critical speeds through conventional low-speed balancing, especially in the case of the rotor with initial bending. In this paper, a low-speed dynamic balancing method for flexible rotors with initial bending is presented first. Combining the modal information of the rotor with the measurement data at speeds below the critical speeds, the low-speed dynamic balancing method is able to balancing the critical speeds without directly measuring the vibrations at the critical speeds and the initial bending of the rotor. Based on this, a mode-by-mode forward higher-order-extra-trial-weight-free method is proposed for balancing the higher modes simultaneously. In the proposed method, the lower-mode balancing weights on different balancing planes are used as trial weights and linked by the modal ratios of the measuring points. This avoids the potential severe vibration when pass through the critical speeds if any additional trial weights are used for balancing the higher-order modes. The proposed method is validated by numerical simulation and experimental tests respectively. The results show that the proposed method is better than the traditional influence coefficient method in balancing performance. In addition, it also avoids potentially high resonant vibration response, thus providing a safer approach for the high order dynamic balancing of flexible rotors.

flexible rotor  /  dynamical balancing  /  critical speed  /  initial bending
Zhenhong DENG, Huageng LUO, Wangqun DENG, Weijian NIE, Haidong LIN, Baoqiang ZHANG. Higher order extra trial weight-free balancing method for flexible rotors with initial bending[J]. Journal of Vibration Engineering, 2025 , 38 (9) : 2080 -2087 . DOI: 10.16385/j.cnki.issn.1004-4523.202309055
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.202309055
  • Receive Date：2023-09-18
  • Online Date：2026-02-09
  • Published：2025-09-10
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History
  • Received：2023-09-18
  • Revised：2023-12-28
Funding
Affiliations
    1.School of Aerospace Engineering, Xiamen University, Xiamen 361102, China
    2.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China
    3.Key Laboratory of Aero-engine Vibration Technology, Aero Engine Corporation of China, Zhuzhou 412002, China
    4.School of Energy and Power Engineering, Beihang University, Beijing 100191, China
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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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