TY - GEN
T1 - Parameter Optimization of Liquid Inertia Vibration Eliminator Based on Genetic Algorithm
AU - Zhang, Lu
AU - Li, Bin
N1 - Publisher Copyright:
© Press of Acta Aeronautica et Astronautica Sinica 2026.
PY - 2026
Y1 - 2026
N2 - The Liquid Inertia Vibration Eliminator (LIVE) is a new type of main transmission vibration isolation device for helicopters, which is connected between the main transmission and the fuselage. With the high static stiffness and dynamic antiresonance characteristics, the LIVE can provide rigid support for helicopter while efficiently isolating the vibration around the target isolation frequency with advantages of compact structure, low mechanical wear and high vibration isolation efficiency. By analyzing the principle of the LIVE, the dynamic equations of the LIVE and the calculation formulas of vibration isolation frequency, displacement transmissibility are deduced. The influence of material parameters and structural geometric parameters on vibration isolation performance, isolation frequency, and weight is analyzed, and the sensitivity of the parameters is calculated. According to the importance of parameters, suitable parameters are selected as decision variables of optimization. Multi-objective parameter optimization model considering the constraints of vibration isolation frequency, mounting space and reasonable area ratio of the LIVE using Nondominated Sorting Genetic Algorithm-II (NSGA-II) is proposed to reduce the total weight and displacement transmissibility of LIVE. With correlation analysis, comprehensive comparison and iterative optimization, the best optimization result is obtained.
AB - The Liquid Inertia Vibration Eliminator (LIVE) is a new type of main transmission vibration isolation device for helicopters, which is connected between the main transmission and the fuselage. With the high static stiffness and dynamic antiresonance characteristics, the LIVE can provide rigid support for helicopter while efficiently isolating the vibration around the target isolation frequency with advantages of compact structure, low mechanical wear and high vibration isolation efficiency. By analyzing the principle of the LIVE, the dynamic equations of the LIVE and the calculation formulas of vibration isolation frequency, displacement transmissibility are deduced. The influence of material parameters and structural geometric parameters on vibration isolation performance, isolation frequency, and weight is analyzed, and the sensitivity of the parameters is calculated. According to the importance of parameters, suitable parameters are selected as decision variables of optimization. Multi-objective parameter optimization model considering the constraints of vibration isolation frequency, mounting space and reasonable area ratio of the LIVE using Nondominated Sorting Genetic Algorithm-II (NSGA-II) is proposed to reduce the total weight and displacement transmissibility of LIVE. With correlation analysis, comprehensive comparison and iterative optimization, the best optimization result is obtained.
KW - Liquid Inertia Vibration Eliminator (LIVE)
KW - Multi-objective optimization
KW - Nondominated Sorting Genetic Algorithm (NSGA-II)
KW - Parameter sensitivity
KW - Vibration isolation
UR - https://www.scopus.com/pages/publications/105022731646
U2 - 10.1007/978-981-95-3025-0_14
DO - 10.1007/978-981-95-3025-0_14
M3 - 会议稿件
AN - SCOPUS:105022731646
SN - 9789819530243
T3 - Lecture Notes in Mechanical Engineering
SP - 200
EP - 212
BT - Proceedings of the 2nd Aerospace Frontiers Conference, AFC 2025 - Volume VII
PB - Springer Science and Business Media Deutschland GmbH
T2 - 2nd Aerospace Frontiers Conference, AFC 2025
Y2 - 11 April 2025 through 14 April 2025
ER -