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Article
Acoustics
E. Delhez et al.
Summary: This paper presents a method for reduced order modeling of turbomachine bladed structures, taking into account both geometric nonlinearity and nonlinear blade-tips/casing contacts. The methodology uses modal derivatives to study contact interactions and is later expanded to full bladed disks using Component Mode Synthesis techniques. The numerical strategy is applied and validated on an industrial compressor bladed disk model.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Multidisciplinary
Dongxu Du et al.
Summary: This study develops discontinuous arc connections with different connecting stiffness to simulate actual mistuning connections. The dynamic model of rotational mistuning-connecting disk-drum coupling structures is derived and verified. The mistuning connections induce changes in mode order, frequency division, and vibration localization. Mistuning also affects the key information in Campbell diagrams.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Mechanical
Lakshminarayana Reddy Tamatam et al.
Summary: This paper investigates the effect of wear on the dynamics of the shrouded bladed disk, focusing on the frictional contacts at the shrouds and the contact interface evolution. The study shows the impact of wear on the steady-state nonlinear dynamic response using a coupled approach.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Jie Yuan et al.
Summary: This paper investigates the influence of mesoscale frictional interface geometries on the nonlinear dynamic response and proposes an efficient multi-scale modeling framework. The effectiveness of the framework is demonstrated and validated through experiments, and the effects of different mesoscale interface geometries are numerically investigated, revealing the influence of mesoscale interface geometries on the nonlinear dynamics of jointed structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Aerospace
Eric Kurstak et al.
Summary: In this work, a parametric reduced-order model (PROM) is presented for modeling the physical response of a bladed disk under realistic conditions. The model is tuned and investigated through a parametric study, with results showing that damping has the greatest impact on the system response. Accurate measurement of damping is therefore crucial.
Article
Automation & Control Systems
Peiyi Zhao et al.
Summary: During the process of high-efficient milling of titanium alloy (Ti6Al4V) workpieces, the instantaneous contact stiffness (ICS) and its distribution between the flank face of the milling cutter tooth and workpiece change instantly due to cutting vibration, leading to instability in the tool flank friction and wear status. This study developed a tool flank micro-convex body stiffness model considering the influence of cutting vibration on instantaneous tool cutting angles. The distribution of ICS and its effect on instantaneous tool flank friction and wear increment were analyzed. The results showed that the non-uniform distribution of ICS was primarily caused by the changes in positive pressure on tool flank under cutting vibration; the friction and wear increment on different areas of the tool flank were directly proportional to the ICS.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Xin Yu et al.
Summary: In this study, a generalized close-formed model of the friction coefficient between fractal surfaces in mixed lubrication is presented. A mathematical transformation from asperity area to oil film thickness is conducted to establish an analytical fractal model of oil film thickness. A dynamic film thickness model with external load under the determination of the surface roughness is proposed. The effects of fractal parameters and important working parameters on friction coefficient are analyzed, and comparison with experimental data is conducted. This work provides a general analytical expression for friction coefficient in mixed lubrication with explicit form and wide applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Alfredo Fantetti et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Renduo Song et al.
Summary: In order to improve the solution efficiency of vibration characteristics for the mistuned blisk, a modular method combined with state-space method based on lumped-parametric model is developed. This method provides a general modeling framework for bladed disk systems with multiple mistuning and variable blade number. The correctness of the method is verified by several comparisons. The effects of the mistuning on the blades and the disk are discussed.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Mechanical
S. Mehrdad Pourkiaee et al.
Summary: A new reduced order modeling technique, Relative Cyclic Component Mode Synthesis (RCCMS), in combination with the Craig-Bampton Component Mode Synthesis (CB-CMS) approach, has successfully achieved accurate prediction of the dynamics of mistuned bladed disks with friction interfaces.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Laihao Yang et al.
Summary: This study focuses on the coupling vibration mechanism of RSDB system, establishing a comprehensive dynamic model and theoretically interpreting the coupling mechanism. Numerical investigations reveal the significant effects of structure parameters on the coupling vibrations, and suggest that the analytical analysis and numerical study results can be cross-verified.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Aerospace
Xianfei Yan et al.
Summary: The study investigated the effects of passive damping treatment with hard coatings on the vibration of rotating blisks. A new finite element model and a reduced order model were developed to analyze the dynamic characteristics of rotating coated blisks and the rotational effects.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Anthony Tacher et al.
Summary: The interaction between the Coriolis and mistuning effects on a finite-element model of a simplified bladed drum compressor was investigated in this paper. The impact of the Coriolis effect was highlighted, and the global dynamic behavior with rotational speed was studied for different excitation frequencies and engine orders. A better understanding of the interaction between the Coriolis and mistuning effects was achieved through in-depth investigation of the blisk. The results showed strong mistuning effects and the appearance of traveling waves in blade-dominated responses and modes close to the veering regions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Multidisciplinary
Houxin She et al.
Summary: This paper focuses on the influence mechanism of cyclic blades on the dynamic coupling of a flexible shaft-disk-blade system. A coupling mechanism model is developed and validated through mathematical analysis and numerical simulation. The effects of cyclic blade motions on dynamic coupling are explored and validated through analytical interpretation and numerical simulation. The results show that cyclic blade motions have a significant impact on dynamic coupling.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mechanics
Xin Yu et al.
Summary: A novel gear fractal backlash model is established in this paper to better consider the joint action of all microscopic asperities on gear dynamics. The proposed model incorporates surface morphology and gear center motion, and a corresponding close-loop algorithm is introduced to solve system dynamics. Through analysis using bifurcation diagram, phase portraits, and Poincare mapping, the chaotic behavior of the gear system and the strong influence of dynamic fractal backlash on its nonlinear characteristics are demonstrated. The superiority of the model is verified through comparison with experimental data.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Mechanics
Evangeline Capiez-Lernout et al.
Summary: This paper deals with the nonlinear stochastic dynamics of bladed-disks with geometric nonlinearities in the presence of random mistuning. It proposes an efficient computational methodology to reduce the computational cost and analyzes the detuning and detuning optimization based on a high-fidelity computational model. The paper presents a deep computational analysis of a 12 bladed-disk structure to understand the role of geometric nonlinearities on the dynamical behavior and its consequences on detuning effects. It also proposes a reformulation of the combinatorial optimization problem for detuning optimization in a probabilistic framework, which limits the number of evaluations of the cost function using a high-fidelity computational model. The methodology is validated for a 12-bladed-disk structure and achieves very good prediction.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Acoustics
Florence Nyssen et al.
Summary: This work focuses on the numerical investigation of mistuned bladed disk dynamics undergoing blade-tip/casing contact events. The effect of mistuning on the bladed disk dynamics is evaluated, highlighting the importance of considering both time and frequency solution methods. The study reveals that time integration strategies may underestimate contact stiffening and maximum amplitudes in tuned bladed disks. Furthermore, the challenges of frequency methods on mistuned bladed disks are discussed, and a stochastic analysis is conducted to quantify the effect of mistuning on the bladed disk dynamics with contact nonlinearities.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Acoustics
Shuai Wang et al.
Summary: This study proposes an effective method for multi-mode vibration attenuation of mistuned bladed disk (blisk) using a ring-like array structure composed of multiple frictional tuned mass dampers (FTMDs). The method employs a 3D finite element method to model the blisk-FTMD array system and takes into account the rotordynamic effects in rotating conditions. Numerical results show that the method is capable of effectively reducing the multi-mode vibration of blisks.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
Weipeng Hu et al.
Summary: This paper investigates the dynamic response of the SMS modeled by a flexible hub-beam with a step-variable cross-section excited by an external torque, employing a new complex structure-preserving method. A new method connecting different techniques is proposed, avoiding time-consuming iteration and providing suggestions for the structure design of SMS.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Mechanical
Xuanen Kan et al.
Summary: This paper establishes a new mathematical model of resonance for an intentional mistuning bladed disk system, and demonstrates that adjusting the intentional mistuning parameter can reduce vibration localization and guide the design of the dynamic characteristics of the intentional mistuning bladed disk.
MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Anthony Tacher et al.
Summary: This study investigates the interaction between Coriolis forces and mistuning on a cyclic symmetric structure, showing that geometrical nonlinearity reinforces the mistuning effect versus Coriolis forces. The sensitivity of eigenvalues and eigenvectors to mistuning is studied using the perturbation method and a lumped parameter model, with a comparison between linear and nonlinear behavior. Evolution from standing wave dominance to traveling wave dominance is observed for isolated modes, while a standing wave dominance remains around the veering zone for other modes.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Xiao-Peng Niu et al.
Summary: The study developed a general framework for fatigue reliability analysis by coupling Latin hypercube sampling with FE analysis to describe the combined effects of multi-source uncertainties on turbine bladed disks. Sensitivity analysis on geometrical uncertainty of the bladed disk showed its critical influence on fatigue lifetime and reliability. The study also highlighted the importance of geometric uncertainty factor in fatigue reliability of engineering components.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Weipeng Hu et al.
Summary: This paper introduces a mechanoelectrical flexible hub-beam model of ionic-type solvent-free nanofluids based on microscopic mechanisms, and proposes a novel simulation approach to study their dynamics. Using this model, the critical initial perturbation intensity for flow initiation is determined, and an upper limit for flow velocity is demonstrated.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Erhan Ferhatoglu et al.
Summary: This study systematically detected the variability observed in the periodic vibration analysis of turbine bladed disks with friction damping using an optimization algorithm. The method involved minimizing the system loss factor to determine the damping ability, while simultaneously imposing dynamic balance equations as nonlinear constraints. Results showed successful capture of the limits of the variability range, contributing to a deeper understanding of the dynamic response of turbine bladed disks.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Acoustics
Houxin She et al.
Summary: This study investigates the eigenvalues of veering and merging phenomena in an assembly bladed disk system, as well as the interactions between disk-dominated and blade-dominated modes. Through numerical analysis using modal functions and frequency-domain methods, it is found that coupling interactions induce various phenomena, with modal frequencies at low rotational speeds significantly affected by nonlinearity.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Aerospace
Kunpeng Xu et al.
Summary: A novel control method using hard coating is proposed to control the mistuning level of blisks, where the thickness of the hard coating is designed according to the mistuning state of blisk substrate. The method effectively reduces vibration localization and controls mistuning levels in the designed coated blisks.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Weipeng Hu et al.
Summary: In the first stage deployment of the IKAROS solar sail, a simplified coupling dynamic model is proposed to analyze the active axial stretching of the flexible beam. A structure-preserving approach is constructed to simulate the evolution of the transverse vibration of the beam and rotation of the hub. The numerical results show that there are coupling effects between the beam deformation, active stretching, and hub rotation in the stretching stage.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Weipeng Hu et al.
Summary: This paper discusses the evolution of attitude angle and mechanical energy transfer/loss between the bus system and solar sail in a tethered satellite system, with a focus on a structure-preserving method. It is found that mechanical energy transfer in the tethered system is influenced by the initial attitude angle, while total mechanical energy loss is almost independent of the initial attitude angle. Additionally, a special stiffness range of the spring is identified in the attitude angle evolution of the system, providing insights for structural parameter design.
ACTA MECHANICA SINICA
(2021)
Article
Acoustics
Houxin She et al.
Summary: This study aims to investigate the effects of mistuning on the non-linear vibration performance of a coupling system using a mechanical model of the flexible bladed disk system. The analysis shows that mistuning can destroy the original vibration characteristics, especially in cases of blade length mistuning, leading to new resonances and vibration localization phenomenon.
Article
Acoustics
Chaofeng Li et al.
Summary: This study reveals the vibration dissipation mechanism of rotating blades with dovetail joints using dry friction damping. By adjusting system parameters, the vibration damping characteristics of the blade can be significantly altered.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2021)
Article
Engineering, Aerospace
Xuanen Kan et al.
Summary: This study investigates a new method for reducing vibration localization in mistuned bladed disk systems using bladed packets. A mathematical model with coupling stiffness is developed to describe the relationship between bladed packets. Results show that bladed packets can effectively decrease the degree of vibration localization in bladed disks, and the relationship between coupling strength and vibration localization is explored, along with optimal multi-packet structures.
INTERNATIONAL JOURNAL OF AERONAUTICAL AND SPACE SCIENCES
(2021)
Article
Acoustics
Yunyun Sun et al.
JOURNAL OF VIBRATION AND CONTROL
(2020)
Article
Acoustics
Weipeng Hu et al.
JOURNAL OF VIBRATION AND CONTROL
(2020)
Article
Acoustics
Bin Bai et al.
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Engineering, Aerospace
Kiran D'Souza et al.
Article
Engineering, Aerospace
Xuanen Kan et al.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2019)
Article
Engineering, Aerospace
Lu-Kai Song et al.
AEROSPACE SCIENCE AND TECHNOLOGY
(2019)
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Acoustics
L. Pesaresi et al.
JOURNAL OF SOUND AND VIBRATION
(2018)
Article
Engineering, Biomedical
Liang Zhang et al.
JOURNAL OF VIBROENGINEERING
(2018)
Review
Computer Science, Interdisciplinary Applications
Malte Krack et al.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2017)
Article
Acoustics
Xuanen Kan et al.
JOURNAL OF SOUND AND VIBRATION
(2017)
Article
Engineering, Mechanical
L. Pesaresi et al.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2017)
Article
Mathematics, Applied
Chuchu Chen et al.
SIAM JOURNAL ON NUMERICAL ANALYSIS
(2016)
Article
Mathematics, Applied
J. M. Sanz-Serna
Article
Acoustics
Ender Cigeroglu et al.
JOURNAL OF SOUND AND VIBRATION
(2006)
Article
Engineering, Mechanical
Jeng Luen Liou et al.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2006)
Article
Mechanics
L Kogut et al.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2002)
