Article
Computer Science, Interdisciplinary Applications
Javier Rivero-Rodriguez, Miguel Perez-Saborid, Benoit Scheid
Summary: The article discusses solving physical problems with partial differential equations in unknown domains using the Arbitrary Lagrangian-Eulerian (ALE) method, and introduces the Differential Boundary Arbitrary Lagrangian-Eulerian (DBALE) method, which is based on the boundary displacement satisfying a boundary partial differential equation, problem-independent, and leading to uniform mesh deformation.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Mechanical
Jun Lai, Jingmang Xu, Tao Liao, Zhaoguang Zheng, Rong Chen, Ping Wang
Summary: Train derailments in low-speed railway turnout areas are very common due to poor track alignment and rail failures. This study uses a dynamic coupled simulation model to explore the derailment behavior caused by rail joint failures before the railway switch panel and to understand the effects of crucial parameters on the operating safety of trains. The results show that increasing the curve radius and distance between the rail joint and switch toe can effectively improve passing safety.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Multidisciplinary
Zhihao Zhai, Chengbiao Cai, Qinglai Zhang, Shengyang Zhu
Summary: This paper investigates the effect of localized cracks induced by environmental factors on the dynamic performance and service life of ballastless track in high-speed railways. A mathematical approach for forced vibrations of Mindlin plates with a side crack is derived and implemented into a train-track coupled dynamic system. The accuracy of this approach is verified by comparing with simulation and experimental results, and the dynamic behavior of the side crack under different conditions is analyzed.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Engineering, Multidisciplinary
Emad Tandis, Ali Ashrafizadeh
Summary: The paper aims to unify numerical models and methods in computational solid and fluid dynamics, proposing a conservative fluid pressure-velocity-based formulation to simulate large deformation of weakly compressible hyper-elastic solids, implemented in OpenFOAM software. The proposed solver allows for flexible grid movement and supports various material models, demonstrated through challenging test cases to assess accuracy and flexibility.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Computer Science, Interdisciplinary Applications
Mack Kenamond, Dmitri Kuzmin, Mikhail Shashkov
Summary: This paper presents a new intersection-distribution-based remapping method for hydrodynamics simulation between different polygonal meshes. By conservatively remapping mass and momentum using intersections between source and target meshes, the method aims to improve accuracy and flexibility in the simulation process.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Albert Puigferrat, Miguel Maso, Ignasi De-Pouplana, Guillermo Casas, Eugenio Onate
Summary: A numerical method combining Lagrangian and Eulerian approaches is proposed to solve advective-diffusive-absorptive problems, showing effectiveness through validation with various test cases.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Marine
Ali Tolooiyan, Kenneth Gavin, Ashley P. Dyson
Summary: This paper presents the design of a spudcan foundation installed off the coast of Tunisia, using traditional analytical methods. A combination of analytical techniques, 2-dimensional axisymmetric modeling, and 3-dimensional Finite Element Methods (FEM) with ALE techniques is used to predict the maximum penetration depth of the footing under the available preload. The comparison between FEM simulation results and SNAME guidelines is based on the spudcan penetration determined from CPT soil profiles simulated by FEM.
Article
Engineering, Mechanical
Zhihao Zhai, Chengbiao Cai, Shengyang Zhu
Summary: In this paper, an improved semi-analytical approach based on the Chebyshev-tau method is proposed for capturing curved bridge vibrations in train-track-bridge dynamic interaction. The approach considers rotary inertia and shear deformation and is implemented into the train-track-curved bridge coupled dynamics modeling. The accuracy and reliability of the approach are demonstrated through eigenvalue analyses and dynamic performance comparisons. The approach is further applied to analyze the dynamics of the coupled system, revealing significant differences compared to conventional methods.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Thermodynamics
Rainald Lohner, Lingquan Li, Orlando Antonio Soto, Joseph David Baum
Summary: This study aims to evaluate the blast loads on and the response of submerged structures. An arbitrary Lagrangian-Eulerian method is developed to model fluid-structure interaction problems. The difference in flow mechanisms between rigid and deforming targets is quantified and evaluated.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Engineering, Mechanical
Lanfeng Deng, Yahui Zhang, Li-Qun Chen
Summary: This paper presents an arbitrary Lagrangian-Eulerian (ALE) formulation for the dynamic analysis of 2D viscoelastic beams using the consistent corotational method. The proposed method allows for the movement of mesh nodes to investigate problems with moving boundaries and loads. By introducing a corotational frame, the rigid-body motion of an element is eliminated, enabling the measurement of pure deformation and deformation rate. The method also ensures consistency and independence by deriving elastic force, inertia force, and internal damping force using the same shape functions. Numerical examples demonstrate the validity, versatility, and computational efficiency of the presented formulation.
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Jianzhen Qian, Zupeng Jia, Fang Qing, Pei Wang
Summary: This article presents a new interface-unaware sub-scale dynamics multimaterial cell closure model for the Lagrangian stage of the cell-centered arbitrary Lagrangian-Eulerian method. The model consists of two stages, utilizing a constant volume fraction model and pressure relaxation models to handle the interactions between materials in multimaterial cells.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Yapeng Li, Yegao Qu, Fangtao Xie, Guang Meng
Summary: This paper presents a numerical method for predicting the nonlinear structural-acoustic interactions between a hyperelastic solid and a compressible viscous fluid. The method accounts for the nonlinearities of both the fluid and solid, and couples the two models using finite element discretization and common interface conditions. The analysis of a hyperelastic ring in a viscous fluid reveals the nonlinear dynamics behaviors, including deformation instability and internal resonance phenomena.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Mechanical
Daniele Di Cristofaro, Andrea Opreni, Massimiliano Cremonesi, Roberto Carminati, Attilio Frangi
Summary: In this study, a simulation strategy for the numerical computation of quality factors in resonant MEMS micromirrors is proposed. The proposed method is validated by comparing the numerical results with experimental data, demonstrating its accuracy and efficiency.
Article
Engineering, Marine
Laura Battaglia, Ezequiel J. Lopez, Marcela A. Cruchaga, Mario A. Storti, Jorge D'Elia
Summary: This paper focuses on the validation of the evolution of the free surface in 3D sloshing models and proposes a global mass-conservation strategy for long-term simulations. The performance of the proposed model is evaluated by comparing the numerical results with experimental data.
Article
Computer Science, Interdisciplinary Applications
Martin Ferrand, Jeffrey C. Harris
Summary: This study presents an Arbitrary Lagrangian-Eulerian (ALE) algorithm for simulating water wave propagation with viscous effects, and tests its capabilities for modeling water wave generation, propagation, and interaction with structures. The results show that the approach is effective at reproducing wave profiles and forces on bodies when grids with excessive numerical dissipation are avoided.
COMPUTERS & FLUIDS
(2021)
Article
Automation & Control Systems
Bingyan Chen, Yao Cheng, Weihua Zhang, Guiming Mei
Summary: This paper presents a framework of generalized compound morphological operator (GCMO) for enhancing the extraction ability of impulsive fault features in noisy mechanical vibration signals. New compound morphological operators are developed by introducing product, convolution, and cross-correlation operations into the GCMO framework. The results demonstrate that the morphological cross-correlation operators are more efficient in repetitive fault impulse feature extraction and bearing fault diagnosis.
Article
Automation & Control Systems
Bingyan Chen, Yao Cheng, Weihua Zhang, Fengshou Gu, Guiming Mei
Summary: In this study, a new targeted feature is proposed to distinguish the optimal frequency band of spectral coherence, and the effectiveness of different methods in bearing fault diagnosis is validated and compared. The advantages and limitations of blind and targeted feature-based methods in different scenarios are summarized, and it is concluded that the presented approach can accurately detect bearing faults.
Article
Engineering, Civil
Yongming Yao, Ning Zhou, Guiming Mei, Weihua Zhang
Summary: This paper establishes a PAC model to realize pantograph lifting during train operation, and analyzes the factors influencing this process. The simulation results show that the maximum impact force increases linearly with the pantograph lifting speed, and the running speed of the vehicle does not affect the pantograph lifting process.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT
(2022)
Article
Engineering, Mechanical
Mei Guiming, Luo Qun, Qiao Wei, Huang Zhong, Lu Jing, Wang Jiangwen
Summary: This paper proposes a method for fatigue test load spectrum compilation for key pantograph components, which involves establishing a dynamics model and applying numerical simulation to obtain the stress load spectrum. The method includes extrapolation and back-propagation techniques to obtain an accelerated load spectrum, which is then verified through bench testing, demonstrating its accuracy and feasibility.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Kaixin Su, Jiawei Zhang, Jiwang Zhang, Tao Yan, Guiming Mei
Summary: This paper utilizes the combination of back-propagation neural network (BPNN) and genetic algorithm (GA) to optimize the current collection quality of the pantograph-catenary system. The study establishes a coupling simulation model and accurately reflects the relationship between input parameters and output CFSD using BPNN models. The optimal parameter combinations are searched using GA. The relative importance of the input optimized parameters is quantified using an evaluation method.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Transportation Science & Technology
Jiangwen Wang, Guiming Mei, Liantao Lu
Summary: This study investigates the dynamic behavior of the pantograph-catenary system through mathematical modeling and computational analysis. It is found that the mass distribution of the pantograph's main structure significantly affects the system's performance, and optimizing the mass distribution can improve the current collection quality.
INTERNATIONAL JOURNAL OF RAIL TRANSPORTATION
(2023)
Article
Engineering, Mechanical
Guiming Mei, Jie Fan, Dayi Liu
Summary: Several long-sliding distance tests were conducted on an overhead wire/current collector to study the electrical sliding abrasion. Test parameters included electric currents, normal forces, sliding speeds, and sliding distance. The test results showed that the electric current had a significant impact on the electrical sliding abrasion performance of the Cu-Ag alloy overhead wire and current collector. Wear mechanisms involved adhesive, plowing, electrical, and arc wears. Wear prediction models were established using the obtained test data and further parameter sensitivity analyses were carried out.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Acoustics
Y. Xu, C. J. Yang, W. D. Zhu, W. H. Zhang
Summary: A reduced-plate model transmission method is developed to accurately and efficiently analyze the dynamics of vehicle-pavement interaction over long distances. This method reduces a wide pavement into small areas known as reduced-plate models, with each model accounting for the vibration caused by the moving vehicle over a small period. By reducing the degrees of freedom and considering the interaction between the vehicle and the pavement, this method improves calculation efficiency and reflects real-world scenarios. The calculation results demonstrate good agreement with the traditional modal superposition method and highlight the significant influence of road roughness and base course layer properties on pavement dynamic responses.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Mechanical
Qun Luo, Guiming Mei, Guangxiong Chen, Weihua Zhang
Summary: This paper examines the effect of crosswind on the quality of the current collection in the pantograph-catenary system and explores the wind stability of different longitudinal suspension forms. The pantograph-catenary system dynamic behavior under crosswind environments is simulated, showing that crosswind affects the low-frequency vibration and deteriorates current collection quality. Different longitudinal suspension forms have varying wind stability, with semi-inclined and inclined forms having better stability, effectively improving current collection quality in crosswind environments.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Engineering, Mechanical
Bingjie Dong, Guangxiong Chen, Qifeng Song, Xiaohang Feng, Juncai Zhang, Guiming Mei
Summary: Rail corrugation is a common form of damage in subway tracks. This study analyzed track wear at two sites on the Chengdu Metro and found corrugation on a 350 m radius track, but not on a 610 m radius curved track. A finite element model was used to predict corrugation and results showed that adjusting the material parameters of rail pads could reduce corrugation frequency.
Article
Engineering, Mechanical
Hongjuan Yang, Dongsheng Yang, Guiming Mei, Cheng Cai, Xingqiao Deng, Yin Yang
Summary: Delamination wear greatly increases the wear loss of the carbon strip and affects the physicochemical properties of the contact pairs in the pantograph-catenary system. This study investigated the wear evolution mechanisms and the extension of delamination wear using a carbon/copper-alloy friction pair and calculated the arc discharge energy to explore the quantitative relationship between delamination wear and arc discharge. The results showed that the frictional coefficient gradually increased with the experiment and was higher with electric current. Under intense arcing, delamination wear initially appeared on one edge of the strip and extended to the middle, leading to increased wear and enhanced arc discharge. Delamination wear and its extension were caused by the cumulative effect of heat from long-term strong arc discharge.
Article
Engineering, Mechanical
Guiming Mei, Guangxiong Chen
Summary: This paper conducts a comprehensive field investigation into rail corrugations of China's metro lines and railway main-lines. The occurrence rate of rail corrugation is found to be 11.94% for metro lines and 2.73% for railway main-lines. The slip of wheels on rails is identified as the root cause for rail corrugation. Model predictions and a fast prediction method for rail corrugation are proposed.
Article
Automation & Control Systems
Hongjuan Yang, Jiaxin Liu, Guiming Mei, Dongsheng Yang, Xingqiao Deng, Chao Duan
Summary: This paper proposes a real-time detection method for rail corrugation based on machine vision and a convolutional neural network, which improves the accuracy and efficiency of rail corrugation detection. A rail surface segmentation method based on the gray maximum value of the sliding window is also proposed. The experimental results show that the improved model has an average detection time of 4.01ms and a detection accuracy 2.78% higher than the unimproved ShuffleNet V2. These research results will contribute to the development of intelligent real-time detection of rail corrugation.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Engineering, Mechanical
Xu Luo, Cheng Cai, Hongjuan Yang, Guiming Mei, Chang Gao, Weiping Liu, Dongsheng Yang
Summary: The present study simulated the actual contact conditions between the catenary and pantograph of a metro line and studied the uneven wear of the pantograph carbon strip under different working conditions. The results showed that the arc power, friction coefficient, and wear amount changed with the increase of current and normal load. Non-uniform wear was observed on all carbon strips, with higher edge erosion and wear depth on the part perpendicular to the moving direction. The ablation of the back end of the carbon strip running with the catenary was higher than that of the front end.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2023)
Article
Engineering, Mechanical
Jiangwen Wang, Weihua Zhang, Guiming Mei
Summary: This study proposes a novel super-critical speed operating strategy for the pantograph catenary system (PCS) to improve the train speed by utilizing the relatively low tensile values of the catenary. The theoretical possibility of the strategy is analyzed using a moving load model, and the differences between simple and stitched catenaries in the super-critical speed regime are compared. The study also investigates the tension forces of the stitched catenary in different speed ratios beyond 400 km/h and discusses the dynamic behaviors of the PCS in the super-critical speed regime.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)
