Effect of coriolis force on forced response magnification of intentionally mistuned bladed disk

Kan, Xuanen; Zhou, Xu; Zhao, Bo; Zhong, Jize

doi:10.1016/j.jsv.2017.03.002

Cited by 23 publications

(9 citation statements)

References 24 publications

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“…e intentionally mistuned design of blisks is performed in the recent years. For example, the intentional mistuning was introduced to reduce the forced response of blade [32][33][34][35]. In addition, some other scholars conducted the reliability and optimization of blades [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

Bai

Yang

Zhu

et al. 2021

Shock and Vibration

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An improved component modal synthesis-based nonproportional mistuning method (ICMS-NPMM) is proposed to investigate mistuned turbine blisks (MTBs) since the high-fidelity finite element models (HFEMs) involve large number of computations, which leads to low calculation efficiency. To reduce degrees of freedom and suppress the flutter of MTB, it is divided into mistuned blade structure and tuned disk structure, and the intentional mistuning is considered. Furthermore, the mistuned parameters, nonproportional mistuning, and complex loads are also considered. Firstly, the basic theory of ICMS-NPMM is investigated; secondly, the model of MTB is established via ICMS-NPMM; finally, the intentionally mistuned design of modal shape amplitudes (MSAs) is investigated via ICMS-NPMM. The results indicate that the calculation efficiency is enhanced via ICMS-NPMM relative to that of via HFEM. In addition, the sensitivity and the flutter are decreased; meanwhile, the amplitude fluctuations of MSAs are distinctly decreased and become comparatively smooth. This investigation provides an important guidance for the vibration characteristic study of complex mechanical structures in engineering practice.

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Section: Introductionmentioning

confidence: 99%

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

Bai

Yang

Zhu

et al. 2021

Shock and Vibration

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“…In addition to the above researches, the contact interface of shrouded bladed disk, localization of vibration energy, and probabilistic dynamic behavior were analyzed [26][27][28][29]. The frequency-perturbation, random excitations, optimization, identification, the dynamic behaviors, aerodynamic effects, the robustness, interstage coupling, and Coriolis force were conducted [30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Application of Improved Dynamic Substructure Finite Element Model-Based State-Space Techniques in Mistuned Blisks

Bai

Zhang

Guangwei

et al. 2020

International Journal of Aerospace Engineering

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Aeroengine is a complex mechanical equipment, and it works at high temperature, pressure, rotational-speed, and severe loads. One of the core problems is that the vibration and mistuning of bladed disk lead to failure and affect the safety and reliability of aeroengine. Previously, one sector taken as the research object is not suitable; the integrally mistuned bladed disk (blisk) is taken as the research object is very necessary; however, the computational efficiency of mistuned blisk is very low. Therefore, a reduced-order model approach, i.e., an improved dynamic substructure finite element model-based state-space technique (IDSFEM-SST), is proposed to investigate the mistuned blisk. Firstly, the reduced-order substructure finite element model is established by this method, and then, the modal frequencies and modal strain energy amplitudes are investigated. Secondly, the maximum displacement responses are analyzed. Finally, the computational efficiency and accuracy of mistuned blisk via IDSFEM-SST is compared with that of the classical dynamic substructure finite element model and the high-fidelity finite element model to verify the effectiveness of this approach. This study has significance to the dynamic research and engineering practices for complex mechanical structures.

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“…Nikolic et al [31] addressed the mutual interaction of Coriolis forces and mistuning on the vibration characteristics of bladed disks and found that the Coriolis force may affect the vibrations of bladed disks at some designs. Kan et al [32] studied the effect of Coriolis force on forced response of intentionally mistuned bladed disk. Although the effects of Coriolis force have been discussed, the influences of the spin softening and stress stiffening effects on the vibration of mistuned bladed disks are not clear.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristics of Rotating Mistuned Bladed Disks considering the Coriolis Force, Spin Softening, and Stress Stiffening Effects

Wang

et al. 2019

Shock and Vibration

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Bladed disks of engine rotors usually operate at harsh conditions of high rotating speeds, which may lead to nonnegligible rotordynamic effects, including Coriolis force, spin softening, and stress stiffening effects. These effects on the vibration of mistuned bladed disks are seldom discussed in available investigations. In this paper, the vibration characteristics of rotating mistuned bladed disks are addressed by considering these rotordynamic effects. First, finite element (FE) models of bladed disks are used to obtain the governing equations of motion, and an efficient method for getting the stress stiffening matrix of sector model is developed. Then, the effective component-mode mistuning method (CMM) is employed to create compact, yet accurate, reduced-order models (ROMs). Finally, the models are validated and used to study the influences of Coriolis force, spin softening, and stress stiffening effects on the vibration of bladed disks with frequency mistuning factors. Numerical results show that these rotordynamic effects could significantly affect the vibrations of mistuning bladed disks, especially in the ranges of high speed, and should be carefully considered during analysis.

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Effect of coriolis force on forced response magnification of intentionally mistuned bladed disk

Cited by 23 publications

References 24 publications

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

Nonproportional Intentionally Mistuned Turbine Blisk Design with Improved Component Modal Synthesis

Application of Improved Dynamic Substructure Finite Element Model-Based State-Space Techniques in Mistuned Blisks

Vibration Characteristics of Rotating Mistuned Bladed Disks considering the Coriolis Force, Spin Softening, and Stress Stiffening Effects

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