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Article
Thermodynamics
H. Mamori et al.
Summary: This paper investigates the control of skin-friction drag reduction in a fully developed turbulent pipe flow through direct numerical simulations. The heating and cooling of the pipe wall are uniform in the streamwise direction and vary in the azimuthal direction, leading to a decrease in skin-friction drag due to buoyancy force. The study identifies two different mechanisms for skin-friction drag reduction: stable stratification and large-scale vortical structures. The former directly attenuates turbulence through buoyancy force, while the latter creates wall jets and forms large-scale streamwise vortices that increase the coherent contribution to the skin-friction coefficient while indirectly reducing the random contribution.
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
(2023)
Article
Engineering, Multidisciplinary
Douglas Monteiro Andrade et al.
Summary: This work presents a fluid transient model that incorporates the viscoelastic behavior of pipes. The model accurately calculates the rates of energy dissipation in the fluid and pipe separately, allowing for a better understanding of the phenomenon and potential applications in theoretical and applied research.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Multidisciplinary
Min Li et al.
Summary: The first objective of this study is to formulate the problem appropriately under the surface elasticity theory. Spatial equations of motion are established using various beam models and then analyzed via a meshless technique. The interactional role of axial force and torque on the fundamental frequency is discussed. The influences of the NW's aspect ratio and interactions with the elastic matrix on the dominant frequencies are systematically displayed. Critical values of the slenderness ratio and NW's radius are graphically illustrated, showing the crucial roles of shear deformation and surface effect on free vibration at these critical levels.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Review
Engineering, Mechanical
Jie Yuan et al.
Summary: Oil and gas pipelines are crucial for fuel transportation, but leakages in them can result in serious consequences. This study fills the gap by conducting a comprehensive analysis of leak detection and localization techniques in the scientific literature. It includes statistical analysis of publications, institutions, and research interests in this field, proposes a classification method for these techniques, summarizes relevant standards, and provides a flowchart for selecting detection methods. Additionally, the study discusses the merits, limitations, and performance of different methods, and suggests potential directions for further improvements.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Multidisciplinary
Yikun Wang et al.
Summary: This paper investigates the stability and three-dimensional nonlinear dynamics of a cantilevered pipe with internal fluid flow characterized by a harmonic component and a constant mean value. The research presents nonlinear equations of motion for the cantilevered pipe and uses numerical methods to analyze the resulting dynamical responses, revealing a rich variety of behaviors.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Multidisciplinary
Xiaoxia Ma et al.
Summary: By utilizing nonlocal continuum mechanics, the buckling characteristics of nanobeams are analyzed. Nonlocal beam models and deformation equations are established and a Galerkin-based meshless approach is used to evaluate the critical buckling response. For the first time, the spatial nonlocal buckling behavior of nanobeams is examined and the significant role of nonlocality and shear deformation is discussed.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Computer Science, Artificial Intelligence
Heming Du et al.
Summary: Probabilistic time series forecasting is a widespread challenge in tasks such as risk management and decision making. This paper proposes a general time series forecasting framework called Deep Non-linear State Space Model (DNLSSM) that effectively models non-linear correlations between observed time series data and underlying dynamic processes by combining deep neural networks and statistical methods. Experimental results demonstrate that the DNLSSM consistently improves the accuracy of probability forecasts compared to baseline methods.
CAAI TRANSACTIONS ON INTELLIGENCE TECHNOLOGY
(2023)
Article
Engineering, Marine
Gang Liu et al.
Summary: This study investigates the natural frequency characteristics of simply supported pipes conveying gas-liquid two-phase slug flow to uncover critical conditions leading to piping system instability. The intermittent features of local flow parameters are emphasized for dynamic analysis of the piping system. Correlations are introduced to reveal the inherent regularity of flow characteristics and vibration performances in slug flow piping systems.
Article
Engineering, Civil
Afshin Marani et al.
Summary: This study utilized TGAN technology to generate synthetic data, improving the training effectiveness of machine learning models. The results demonstrate that training with synthetic data can significantly enhance the accuracy of predicting the shear capacity of FRP-reinforced concrete beams.
ENGINEERING STRUCTURES
(2022)
Article
Acoustics
Pei Zhang et al.
Summary: This paper presents predictive models for the free vibration of Euler-Bernoulli beams subjected to a uniformly thermal environment using the two-phase local/nonlocal mixture theory. The effects of temperature, size, and vibration mode on the beams are considered.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Acoustics
Wei Chen et al.
Summary: In this study, a geometrically exact model was established to describe the large deformation behavior of fluid-conveying curved pipes with arbitrary initial configuration. The effectiveness of this new model and numerical algorithm was validated by comparing with existing models. The results showed that the newly developed model could accurately predict the large deformation behavior of flexible curved pipes, and the effects of mass ratio, flow velocity and gravity parameter were studied.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Engineering, Mechanical
K. Zhou et al.
Summary: This paper investigates the dynamical problem of fluid-conveying pipes consisting of both flexible and rigid pipe segments. The nonlinear governing equations of the pipe system are obtained using the absolute nodal coordinate formulation (ANCF) and extended Lagrange equations. Various analyses are conducted to explore the effects of the rigid segment on the static and dynamic characteristics of the pipe system. The results show that the presence, location, and length of the rigid segment significantly influence the oscillating shapes and static equilibrium configurations of both straight and curved pipes.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Marine
Bai-Qiao Chen et al.
Summary: The objective of this study is to estimate the collapse pressure of steel pipelines under random non-uniform general corrosion and localized corrosion. Non-linear, large deformation, and three-dimensional finite element analyses were used to assess the reduction in collapse pressure of offshore pipelines. The numerical approach was validated against experimental results, and various levels of corrosion deterioration were considered. The study found that the thickness reduction significantly affects the collapse strength, and different collapse modes are induced by different corrosion locations.
Article
Engineering, Mechanical
Yu-Fei Shao et al.
Summary: In this study, the free vibration characteristics of fixed-fixed Timoshenko pipe carrying fluid were investigated analytically and numerically. Various factors, including critical flow velocity, nontrivial static equilibrium configuration, and natural frequencies, were found to affect the vibration behavior of the pipe.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Bakhtiyar Khudayarov et al.
Summary: This study creates a mathematical model, numerical algorithm and computer program to study the vibration of composite pipelines based on the theory of beams. A mathematical model of vibration of a viscoelastic pipeline with pulsating fluid flow is developed. The stability and amplitude-time characteristics of vibration are studied under various parameters. The critical velocities at which the pipe loses its equilibrium shape are found. The influence of singularity in the kernels of heredity on the vibrations of structures is numerically studied. The research provides insights into the effects of viscosity, fluid pulsation frequency, and other parameters on pipe vibrations.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2022)
Article
Mathematics, Applied
Sha Wei et al.
Summary: The nonlinear forced vibration of a viscoelastic fluid-conveying pipe with nonlinear supports at both ends is investigated in this study, using the multi-scale method and modal revision method. The results demonstrate the significant effect of boundary nonlinearities on the dynamic characteristics of the pipe system.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Engineering, Multidisciplinary
Jiafeng Chu et al.
Summary: This paper investigates the potential instability and vibrations of triple-nanowire systems carrying electrical current using the surface elasticity theory. The surface energy-based equations of motion are developed and the natural frequencies are evaluated using a meshless approach. The effects of various factors on the dominant frequencies are discussed.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Engineering, Multidisciplinary
Boyuan Mu et al.
Summary: This study investigates the spatial buckling behavior of nanowires under axial force and twisting moment, and establishes the governing equations solved by the reproducing kernel particle method (RKPM). A reasonably good match between the results attained by the RKPM and those of the assumed modes approach (AMA) is achieved. The unstable conditions of the nanowires under severe axial forces and twisting moments are identified for the first time, and the critical roles of shear deformation and surface energy are methodically displayed and discussed.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Acoustics
Andrzej Czerwinski et al.
Summary: This paper presents a study on the dynamics of a spiral tube with fluid flow using linear and non-linear models. The adequacy of the models is confirmed through experimental results, and the effects of flow velocity, pulsation frequency, and pulsation amplitude on the system's vibrations are examined.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Chemistry, Physical
Jonatas Valenca et al.
Summary: This paper proposes and benchmarks a contact-free architecture for measuring the strain level of CFRP laminates based on computer vision. The architecture, using machine learning and deep learning methods, provides an economic feasible, automated, easy-to-use, and accurate solution. It can be widely used in the application of pre-stressed CFRP laminates.
Article
Computer Science, Artificial Intelligence
Fan Bailin et al.
Summary: Based on the dynamic model of the intelligent firefighting vehicle, a linear 2-DOF lateral dynamic model and a preview error model are established. A Radial Basis Function neural network sliding mode controller is designed to solve the problems of non-linearity, time-varying parameters, output chattering, and poor robustness. Simulation results show that the controller has high accuracy in tracking the desired path and has good robustness to speed changes of the vehicle.
CAAI TRANSACTIONS ON INTELLIGENCE TECHNOLOGY
(2022)
Article
Acoustics
K. Zhou et al.
Summary: The nonlinear static and dynamic behaviors of cantilevered pipes conveying fluid were explored, exhibiting interesting and sometimes unexpected results such as extremely large flow-induced static deformation of the pipe and variable critical flow velocity for flutter instability. It was demonstrated that the slightly curved pipe oscillates about the static equilibrium position and exhibits periodic motion as the preferred form of post-instability behavior within a wide range of system parameters considered.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Electrical & Electronic
Yiheng Wei
Summary: The Lyapunov method is a powerful tool for studying the stability of dynamic systems. This paper focuses on the boundedness of nonlinear nabla fractional order systems and derives two stability criteria using the nabla Laplace transform. Two numerical examples are provided to evaluate the effectiveness and practicability of the theoretical results.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Review
Computer Science, Artificial Intelligence
Wengang Zhang et al.
Summary: With the rise of big data era, deep learning has become crucial in the field of artificial intelligence, attracting researchers globally. This study presents the state of practice of deep learning in geotechnical engineering, elaborating on four major algorithms and their applications.
ARTIFICIAL INTELLIGENCE REVIEW
(2021)
Article
Chemistry, Multidisciplinary
Atsushi Takano et al.
Summary: The study derived the numerical buckling load of rectangular composite pipes under torsional load using the energy method, and found no available simple design method. By researching different length-to-width ratios, width-to-height ratios, and [0/90] layer ratios, a closed-form polynomial equation for the buckling load factor was established, with errors sufficiently good for preliminary design and parametric design studies and optimization.
APPLIED SCIENCES-BASEL
(2021)
Article
Mathematics, Applied
Kun Zhou et al.
Summary: This study reevaluates the stability and nonlinear dynamics of supported pipes with geometric imperfections by considering flow-induced static deformation, introducing nonlinear governing equations based on the ANCF and extended Lagrange equations. Results show that different geometric imperfections have significant impacts on the stability and nonlinear responses of the supported pipes under different flow velocities.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2021)
Article
Engineering, Marine
Si-Qin Ye et al.
Summary: This paper investigates the vibration characteristics of a slightly curved pipe conveying fluids in a supercritical range for the first time. The analytical predictions agree well with numerical results obtained using different methods, providing useful information for further studies of fluid-conveying pipes with geometric imperfections.
Article
Mechanics
Rajidi Shashidhar Reddy et al.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2020)
Article
Engineering, Marine
Xia Tan et al.
Article
Engineering, Ocean
Yang Guo et al.
APPLIED OCEAN RESEARCH
(2020)
Article
Engineering, Mechanical
B. A. Khudayarov et al.
ENGINEERING FAILURE ANALYSIS
(2020)
Article
Mechanics
Qian Li et al.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2020)
Article
Acoustics
Xia Tan et al.
JOURNAL OF SOUND AND VIBRATION
(2020)
Article
Engineering, Electrical & Electronic
Mergen H. Ghayesh et al.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2019)
Article
Engineering, Mechanical
Xiao-Ye Mao et al.
NONLINEAR DYNAMICS
(2019)
Article
Acoustics
Xia Tan et al.
JOURNAL OF SOUND AND VIBRATION
(2018)
Article
Acoustics
Andrzej Czerwinski et al.
JOURNAL OF SOUND AND VIBRATION
(2018)
Article
Materials Science, Multidisciplinary
Wang Yikun et al.
JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES
(2017)
Article
Mechanics
Sha Zhou et al.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2017)
Article
Engineering, Biomedical
E. M. Attia
JOURNAL OF VIBROENGINEERING
(2016)
Article
Engineering, Mechanical
Xiao-Ye Mao et al.
NONLINEAR DYNAMICS
(2016)
Article
Geosciences, Multidisciplinary
Mohamed A. Shahin
GEOSCIENCE FRONTIERS
(2016)
Article
Materials Science, Multidisciplinary
Keivan Kiani
CURRENT APPLIED PHYSICS
(2014)
Article
Mechanics
Li-Qun Chen et al.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2014)
Article
Engineering, Mechanical
Qiao Ni et al.
NONLINEAR DYNAMICS
(2014)
Article
Engineering, Multidisciplinary
Feng Liang et al.
APPLIED MATHEMATICAL MODELLING
(2013)
Article
Engineering, Multidisciplinary
Keivan Kiani
APPLIED MATHEMATICAL MODELLING
(2013)
Article
Acoustics
Yan-Lei Zhang et al.
JOURNAL OF SOUND AND VIBRATION
(2013)
Article
Engineering, Mechanical
Yan-Lei Zhang et al.
NONLINEAR DYNAMICS
(2012)
Article
Engineering, Multidisciplinary
Zhang MingMing et al.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2010)
Article
Acoustics
Li-Qun Chen et al.
JOURNAL OF SOUND AND VIBRATION
(2008)
Article
Engineering, Mechanical
L. N. Panda et al.
NONLINEAR DYNAMICS
(2007)
Article
Mathematics, Applied
Xu Jian et al.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2006)
Article
Engineering, Marine
S Kaewunruen et al.
Review
Acoustics
DG Gorman et al.
JOURNAL OF SOUND AND VIBRATION
(2000)
