Haiyu Feng’s research while affiliated with Shenyang Ligong University and other places

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Publications (3)


Solid model of multistage bladed-disk system
Substructure solid model of multistage bladed-disk system
Substructure analysis model of multi-stage blade-disk system
Finite element model of multistage blade-disks after condensing super element
Comparison of dynamic frequency calculation results between the integral blade disk model and the substructure model

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Optimization analysis of vibration reduction for aeroengine multistage blade-disk system
  • Article
  • Full-text available

November 2024

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37 Reads

Xiaomei You

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Haiyu Feng

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Pengbo Liu

In order to reduce the vibration localization of multistage blade-disk system of aeroengine compressor, the integral model and substructure model of multistage blade-disk system are established by using substructure modal synthesis method, and the dynamic characteristics of two models are analyzed and the accuracy of the substructure model is verified by comparison. Based on the substructure model, two optimization algorithms of the random wear mass and the snake optimization are proposed. The results show that the vibration amplitudes of the two models are in good agreement in the first 200 modes, and the substructure model meets the requirement of analysis accuracy. Both optimization algorithms can effectively reduce the degree of the vibration localization of the mistuned blade-disk system. The random wear mass algorithm can quickly reduce the amplitude of the blade. The snake optimization algorithm can find the global optimal solution with enough iterations. The results show that the maximum vibration amplitude and the vibration localization factor after optimization are reduced by 5.72 % and 12.0 % respectively by using the random wear mass algorithm, and that of 9.13 % and 16.7 % respectively by using the snake optimization algorithm. The analysis method presented in this paper takes into account the analysis efficiency and analysis precision, it can be used for dynamic analysis and vibration reduction optimization of large power machinery such as aeroengine and gas turbine, and provides a basis for further improving the reliability and service life of aircraft.

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Vibration characteristics of mistuned multistage bladed disks of the aero-engine compressor

September 2022

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36 Reads

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1 Citation

In order to analyze the vibration characteristics of mistuned multistage bladed disks of an aero-engine compressor, a finite element reduction model of mistuned multistage bladed disks is established based on substructure modal synthesis method. The accuracy of the substructure model was verified by comparing calculation accuracy of the substructure model and the integral model. The influence of different modal truncation numbers on the calculation results are discussed. The vibration modes of each stage of the bladed disks are obtained, the forced response is analyzed from the perspective of strain energy. The result shows that modal truncation number, rotation softening effect, and speed have significant effects on the dynamic frequency calculation results of the multistage bladed disks. The typical mode shapes of the first 200 orders of multistage bladed disks are obtained. With the increase of mistuning standard deviation, the strain energy of multistage bladed disk system decreases gradually.

Citations (1)


... Wei Wuguo et al. [19] took the basic structure of the vane, disc and drum of the compressor rotor as the research object, optimized variables such as shape and size, and obtained better optimization results without changing the reliability of the structure. You Xiaomei et al. [20] established a three-stage blade-disk lumped parameter model with interstage coupling, and used Monte Carlo sampling technique to simulate the random mistuning mode of the stiffness of the blade-disk system. The vibration response of the three-stage blade-disk system in the harmonic and mistuning state is obtained by analyzing the vibration response of each vibration mode. ...

Reference:

Optimization analysis of vibration reduction for aeroengine multistage blade-disk system
Analysis of random mistuning vibration characteristics of multi-stage bladed disk system
  • Citing Conference Paper
  • October 2023