Experimental and numerical investigations on novel models for mechanical behaviors of the elastic ring in aero-engine

Zhang, Luo; Li, Lei; Yang, Yang; Hou, Xihuan; Liu, Jiaxi; Ding, Zhe

doi:10.1177/09544062211013066

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…The FEM model is shown in Figure 2, while its geometric parameters are shown in Table 1. The supports of the rotor system are composed of an elastic ring assembly, 23,24 a bearing pedestal, and a bearing. Furthermore, the elastic ring assembly includes an elastic ring, an inner bushing, and an outer bushing.…”

Section: Discussion and Resultsmentioning

confidence: 99%

Study on the effect of dynamic stiffness of supporting structure on dynamic characteristics of the rotor system

Liu

Zhang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rotor systems are the critical components of many rotational machines. The dynamic stiffness of the supporting structure affects the dynamic characteristics of the rotor system significantly. The effect can’t be overlooked for obtaining accurate dynamic characteristics. The judgment index of dynamic stiffness influence (DSI) is proposed in this paper to evaluate the degree of dynamic stiffness influence on the dynamic characteristics. The dynamic model of the rotor system considering the dynamic stiffness of supports is established, and the expression of DSI is given. Then the Campbell diagrams and corresponding DSI values for different system parameters under the influence of dynamic stiffness are discussed and analyzed. The effectiveness of DSI is verified by the literature. Besides, an experiment is carried out to verify the effectiveness of the DSI. The results indicate that the effectiveness of DSI can be confirmed by both numerical and experimental cases, and that the DSI can evaluate the degree of dynamic stiffness influence well.

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Section: Discussion and Resultsmentioning

confidence: 99%

Study on the effect of dynamic stiffness of supporting structure on dynamic characteristics of the rotor system

Liu

Zhang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…However, in extreme cases, the ER will contact the base, resulting in nonlinear stiffness of the ER. Luo et al [6] proposed the finite element model of ER and the static stiffness test device of ER was designed based on the Guo's test [7]. Then, the characteristic of piecewise linear stiffness of ER was revealed by comparison between experiment and FE simulation.…”

Section: Introductionmentioning

confidence: 99%

“…But there are relatively few studies on the dynamic analysis of the ER-rotor with variable stiffness [6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of the variable stiffness support rotor system with elastic rings

Sun

Zhang

et al. 2022

Nonlinear Dyn

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Elastic rings are common rotor supporting structure, which have been widely used in aeroengine rotorsupport system. However, large inertia force and gyroscopic moment may occur during the operation of aeroengine, which may lead to contact between elastic ring and bearing pedestal, and then introduce variable stiffness into the rotor-support system. In this paper, a mathematical model of variable stiffness of elastic ring is proposed and this model is subsequently verified by comparison with simulation analysis and experimental results. Based on this model, a variable stiffness model of an elastic ringsupported rotor is developed by coupling the kinetic equations of the rotor with the deformation of the combined support. Then, the spectrum cascades are used to analyze the dynamic characteristics of the rotor system. In addition, the influences of the variable stiffness of elastic ring on the critical speed of the system are also examined. Finally, some simulation results are verified by experiments on a combined test bench of an elastic ring-supported rotor.

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Multi-objective parameter matching of elastic ring for rotor system by using particle swarm optimization method

Sun,

Luo,

et al. 2024

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PurposeElastic rings served as the elastic supporting elements which have been extensively used in the aeroengines for maneuverable planes with high overloading. However, under extreme conditions, the elastic ring contacts the bearing seat, causing elastic ring failure. Therefore, it is necessary to optimize the matching parameters of the elastic ring in order to suppress the occurrence of elastic ring failure under harsh working conditions.Design/methodology/approachIn this paper, a rotor system supported by elastic rings is researched and a multi-objective parameter matching method of elastic ring is proposed, considering the elastic ring failure, rotor system’s frequency forbidden zone and rotor system’s dynamic response. Then, the particle swarm optimization algorithm is used to dynamically constrain the parameter matching space and obtain the ideal solution for the elastic ring parameter matching.FindingsBy analyzing the elastic ring’s matching results (different unbalanced forces and disk masses), the relationship between the trend of Pareto front changes and rotor system parameters is studied. In addition, the rotor system’s dynamic characteristics before and after parameter matching are analyzed.Originality/valueThis article provides guidance for the design of elastic rings by matching the parameters of elastic rings.

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Experimental and numerical investigations on novel models for mechanical behaviors of the elastic ring in aero-engine

Cited by 3 publications

References 24 publications

Study on the effect of dynamic stiffness of supporting structure on dynamic characteristics of the rotor system

Study on the effect of dynamic stiffness of supporting structure on dynamic characteristics of the rotor system

Dynamic analysis of the variable stiffness support rotor system with elastic rings

Multi-objective parameter matching of elastic ring for rotor system by using particle swarm optimization method

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