Article
Construction & Building Technology
Lei Xu
Summary: In order to evaluate the ground vibration caused by metro tunnel operations, it is necessary to extend the near-field vibration of train-track-tunnel to the far-field vibration of train-track-tunnel-soil through numerical analysis. This study proposes an isoparametric element permutation method that integrates triangular prismatic elements and spatial isoperimetric elements to model the tunnel-soil system effectively. The tunnel and soil subsystems are coupled using spring-dashpot elements. The effectiveness of this model is validated through comparison with measurements on site.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xueping Wang, Jun Zhang, Jianyong Zuo
Summary: In this paper, a wheelset-rail finite element model was established for contact analysis, and a calculation method for wheel tread wear was proposed. The study found that there was a small difference between the predicted wear amounts and the measured data, and the predicted worn profiles had the same change trend as the measured profiles. This calculation method has high computational efficiency and reliability, and it has significant research significance and practical value.
Article
Engineering, Geological
M. Esmaeili, M. Sabbaghi, M. Kharaghani
Summary: The existence of soft soil layers and high ground water level in the Qom Salt Lake area has caused excessive deflection in the Tehran-Isfahan high-speed railway. To address this issue, the stiffness and strength of the soil will be improved using concrete pile groups. However, the high train speed may lead to resonance phenomenon. This study investigates the effect of pile group dimensions on the dynamic behavior and critical speed of the track-ground system using a 3D finite element model. Results show that the critical speed can be increased to 250 km/h by improving the soil layers with pile groups.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
You Wu, Chenguang Shi, Yunhong Yu, Huimin Chen, Yulou Fan, Houzhi Wang, Jun Yang, Wei Huang
Summary: Elastic cured track bed is being increasingly used in high-speed railway construction due to its high deformation tolerance and stress reduction capacity. This study designed and fabricated four different stiffness dry-mixed rubberize epoxy asphalt mixture (DREAM) to achieve smooth change of stiffness in the transition zone of a high-speed railway. Simulation results show that DREAM has better performance compared to polyurethane track in terms of stress reduction and protecting the substructure.
TRANSPORTATION GEOTECHNICS
(2023)
Article
Chemistry, Multidisciplinary
Alexandr Avsievich, Vladimir Avsievich, Nikita Avsievich, Dmitry Ovchinnikov, Anton Ivaschenko
Summary: This paper proposes a new approach for railway path diagnostics based on track line stress-strain analysis using high-precision accelerometers, enabling the development of a railway digital twin and real-time monitoring of the technical parameters of the railway track. Mathematical methods are used to evaluate wear, and the research results have been tested and validated at a testing ground.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Bin Feng, Yuamar Imarrazan Basarah, Qiusheng Gu, Xiang Duan, Xuecheng Bian, Erol Tutumluer, Youssef M. A. Hashash, Hai Huang
Summary: This paper discusses an advanced testing effort in a controlled laboratory environment for measuring dynamic load responses and developing computer models suitable for full-scale ballasted track analysis. The study utilized various sensors to capture vibration velocities, soil stresses, and deformations caused by dynamic train loads, and compared the test data with preliminary Discrete Element Method simulations.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Engineering, Mechanical
Mehmet Hamarat, Mayorkinos Papaelias, Sakdirat Kaewunruen
Summary: Twists in modern railways can indicate track quality, but excessive twists can lead to faults and safety risks. Ballasted tracks are prone to twist faults due to poor endurance and vulnerability to extreme events. Flood-induced damage can critically impact turnout structures and lead to train derailments, emphasizing the need for precautionary measures in railway operations.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Green & Sustainable Science & Technology
Xin Wang, Yi Zhuo, Shunlong Li
Summary: This paper proposes a damage detection method for high-speed railway box girders based on train-induced responses. The traditional method based on the Euler beam theory cannot be applied due to the coupling effects of bending and torsion. The proposed method divides the box girder section into different components and preprocesses the strain responses using PCA to remove the influence of train operation variation. The AR model's residual error is used as a potential index of damage features.
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
Green & Sustainable Science & Technology
Guoqing Di, Ziyin Xie, Jingyi Guo
Summary: The study investigated the impact of environmental vibration from high-speed railways on over-track buildings. By establishing a finite element model and a simplified model, the influence of vibration was quantified. Improvements were made to existing models to predict vertical vibrations on different floors by introducing correction terms related to the structure of the over-track building.
Article
Chemistry, Multidisciplinary
Xiangyan Fan, Laijun Liu, Xiaodan Wang, Jincheng Cao, Wenjie Cheng
Summary: This study integrates finite element software ABAQUS with multi-body dynamics software Universal Mechanism (UM) to construct a joint simulation model of the train-track-overhead system. The findings demonstrate the sensitivity of the train body's response to track irregularity and the influence of speed on system safety.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Civil
Khosrow Asghari, Saeed Sotoudeh, Jabbar-Ali Zakeri
Summary: Research shows that the length and thickness of the transition zone have a significant impact on the dynamic behavior of the transition zone. These factors essentially determine the deformation intensity and behavior pattern of the transition zone.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Construction & Building Technology
Yunlong Guo, Can Shi, Chunfa Zhao, Valeri Markine, Guoqing Jing
Summary: This study investigates the impact of using crumb rubber (CR) in the ballast layer on the dynamic performance of train and ballast layer. The results show that CR can increase the accelerations of sleeper, rail and train, but decrease the ballast degradation and subgrade surface stress. Small size CR has a greater influence on the system's dynamic performance and is more effective in improving sleeper displacement, subgrade stress, and ballast bed stress.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Ran Liu, Li Song, Jiwei Cao, Zhihua Xia, Zhiwu Yu
Summary: This study aimed to analyze the deviation in flatness of the high-speed railway CRTS III track slabs and proposed six improved designs for the steaming process and construction. A numerical model was established to predict the warping deformation of the track slab, and it was found that high-temperature steam curing increases the maintenance time and accelerates the strengthening rate. The primary factor causing warping deformation was identified as early shrinkage, and it was concluded that effective control of warping deformation can be achieved through secondary water spraying and presetting a reverse arch.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Lizhong Jiang, Kang Peng, Wangbao Zhou, Jian Yu
Summary: The study investigates the impact of track irregularity on the train-track-bridge system interaction, which is significant for the seismic design. Finite element models of the CRTS II plate high-speed railway simple-supported girder bridge and CRH2C high-speed train model are developed and validated. The influence of track irregularity on the seismic response of bridge structures is minor, but it significantly affects the seismic response of track structures.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
M. S. Sandeep, Koravith Tiprak, Sakdirat Kaewunruen, Phoonsak Pheinsusom, Withit Pansuk
Summary: In recent years, machine learning techniques have been widely applied in solving challenging structural engineering problems, providing highly accurate models to replace empirical and semiempirical prediction models. This paper discusses the fundamental terminologies and concepts of commonly used machine learning algorithms for solving structural engineering problems. It also presents a comprehensive literature review on the application of machine learning in predicting shear strength, covering various types of beams. The article concludes with major observations, challenges, and future scope in this field. It serves as a valuable resource for individuals unfamiliar with machine learning but eager to learn more.
Article
Engineering, Civil
Yang Li, Haiyan Li, Guangpeng Zhang, Sakdirat Kaewunruen
Summary: This study investigates the structural responses of longitudinally coupled slab tracks (LCSTs) under extreme heat waves (EHWs) and the adaptability of track reinforcement measures. A novel finite element model (FEM) is established to assess the nonlinear mechanical behaviors of LCSTs. The paper highlights the nonlinear structural responses of LCSTs and demonstrates the effectiveness of track reinforcement measures in mitigating track damage under EHWs.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Ruihua Liang, Weifeng Liu, Sakdirat Kaewunruen, Hougui Zhang, Zongzhen Wu
Summary: In this study, advanced hybrid models of Convolutional Neural Network (CNN) and Long Short-Term Memory (LSTM) network were built to accurately and efficiently classify and evaluate the impact of multiple external vibration sources on sensitive buildings such as laboratories and heritage buildings. The proposed optimal model achieved an accuracy of over 97% for identifying external vibration sources by utilizing extensive data recorded in Beijing. A real-world case study was conducted, demonstrating the necessity and feasibility of this study for engineering applications.
STRUCTURAL CONTROL & HEALTH MONITORING
(2023)
Article
Chemistry, Physical
Pasakorn Sengsri, Sakdirat Kaewunruen
Summary: This study investigates the effects of flood conditions on the dynamic properties of novel 3D-printed porous bridge bearings. Experimental results show that higher flood levels result in higher dynamic damping ratios but lower natural frequencies and dynamic stiffness. These findings are essential for bridge engineers to evaluate and monitor bridge vibrations under extreme weather conditions.
Article
Multidisciplinary Sciences
Jessada Sresakoolchai, Sakdirat Kaewunruen
Summary: Railway maintenance is a complex task that can result in various negative consequences if done ineffectively. Predictive maintenance is proven to be the most efficient approach, but it requires a suitable tool. This study proposes using deep reinforcement learning and digital twin integration to improve the efficiency of railway maintenance.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Multidisciplinary
Mehmet Hamarat, Sakdirat Kaewunruen
Summary: This paper proposes a novel approach based on the physical meaning of the bond network to evaluate damage in Peridynamic simulations and identify crack initiation and propagation. The commonly used nodal damage value is questioned for neglecting the relevance of broken bonds to cracks. The proposed method is shown to be robust, effective, and provide a single outcome for Peridynamic simulations.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Civil
Hao Fu, Junhui Huang, Sakdirat Kaewunruen
Summary: Bioinspired lightweight Primitive and Gyroid structures are two well-known TPMS cellular structures with high specific strength and energy absorption capacity, making them promising for prefabricated civil engineering applications. However, there has been a lack of investigation into the mechanical properties and failure patterns of these structures under combined compressive and torsional loads. This study uses the discrete element method to simulate the structures and reveals that compressive load enhances the torsional bearing capacity, but torsional load reduces the compressive bearing capacity.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Ruihua Liang, Weifeng Liu, Lihui Xu, Xiangyu Qu, Sakdirat Kaewunruen
Summary: This paper proposes a new PINN frequency domain (PINNFD) method by embedding Fourier features to solve the difficulty of approximating multi-frequency target functions in PINN. The effectiveness of the proposed method is validated by solving elastodynamics problems under various dynamic point loads. The results show that the proposed PINNFD method achieves better results in all cases of loading conditions, demonstrating its advancement in solving multi-frequency problems in engineering applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Sakdirat Kaewunruen, Joseph Roxburgh, Alex M. Remennikov
Summary: This study investigates the blast responses of the thin-shell structure of the Hyperloop tunnel system and proposes venting port designs to mitigate the blast effects. These findings provide valuable insights for hyperloop engineers to ensure safety and reliability in the face of cyber and physical threats.
Editorial Material
Construction & Building Technology
Sakdirat Kaewunruen, Yunlong Guo, Guoqing Jing, Akira Matsumoto
FRONTIERS IN BUILT ENVIRONMENT
(2023)
Article
Construction & Building Technology
Yang Li, Jinjie Chen, Jianxi Wang, Sakdirat Kaewunruen
Summary: This study investigates the interface debonding and slab end arching of anchor-reinforced and coated longitudinally continuous slab tracks. A novel finite element model with a tailored cohesive zone model has been established and validated. The study assesses the effects of anchor and coating applications on track damages and identifies effective maintenance methods. The findings show that the combined use of anchors and coatings can significantly reduce vertical relative displacement, and an increase in anchor quantity above 6 does not have a significant impact on damage mitigation.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
Article
Construction & Building Technology
Jessada Sresakoolchai, Sakdirat Kaewunruen
Summary: The goal of this study is to reduce carbon emission from railway maintenance by applying reinforcement learning (RL) to optimize maintenance activities. The RL model is developed using field data from 2016-2019 for a 30 km railway section, with Proximal Policy Optimization (PPO) as the algorithm. The results demonstrate a 48% reduction in carbon emission and a 68% decrease in railway defects, leading to significant improvement in maintenance efficiency.
DEVELOPMENTS IN THE BUILT ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Sakdirat Kaewunruen, Mohd Haniff Osman
Summary: This study proposes a novel strategy to enhance the value of track measurement information by constructing a data generation model. The model effectively generates artificial track measurement data by assigning synthetic data on each measurement point of the affected track segment. A NARX (nonlinear autoregressive with exogenous variables) model is proposed to incorporate short-range memory dependencies and interdependent effects from external factors. The model evaluation demonstrates that the data generation model for disrupted track measurements is reliable, accurate, and easy-to-use. This novel model is an essential breakthrough in railway track integrity prediction and resilient operation management.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Mechanical
Pasakorn Sengsri, Sakdirat Kaewunruen
Summary: Bridge bearings are important components in bridge systems. Common bearings are widely used in small- to medium-span highway bridges due to their economic efficiency and good performance. However, their low crashworthiness and specific energy absorption under combined compression and shear loading conditions is due to their heavy weight, high costs, and non-recyclability of steel and elastomer materials. This study investigates the cyclic responses of 3D-printed TPMS bridge bearings under different normal pressures, providing new insights into the nonlinear effects of normal pressure on their dynamic cyclic behaviors.
Article
Engineering, Marine
Rui He, Jian Zhang, Sakdirat Kaewunruen, Ming Zhan, Ping Liu
Summary: This study investigates the dieless bulging and nonlinear buckling behaviors of a stainless longan-shaped pressure hull. Analytical, experimental, and numerical methods were used to analyze the stress, yielding load, and bulging behavior of the hull.
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING
(2023)
Article
Engineering, Mechanical
Willy Ank de Morais, Railson Bolsoni Falcao, Mario Boccalini Jr, Fernando Jose Gomes Landgraf
Summary: This study compares the fatigue behavior of bcc Nb-48 wt%Ti (Ti-36at%Nb) alloy parts processed by Laser Powder Bed Fusion (L-PBF) using two different types of powders (spherical powder produced by Plasma Atomization and irregularly shaped powder produced by Hydride-Dehydride). The results show that the fatigue behavior is similar for both powders, but the specimens produced from the Hydride-Dehydride powder have higher dispersed results. Fracture primarily occurs in the porosities near the machined sample surface, and the fatigue cracks propagate in a zigzag mode parallel to the L-PBF building direction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Guoxi Jing, Shuai Sun, Teng Ma, Shubo Li, Tian Ma, Junchao Wei, Jianchao Pang
Summary: This study proposes a parameter identification method for predicting the TMF life of CGI materials used in cylinder heads. The study evaluates the TMF behavior of RuT450 material and successfully predicts its TMF life using multi-objective optimization. The results highlight the influence of plastic strain amplitude, temperature, and strain rate on the damage mechanism and life prediction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xin Zhang, Xu Li, Weipeng Xu, Kuidong Gao, Kao Jiang, Xinyu Wang, Hongxin Wei
Summary: Conical picks are commonly used in tunnel excavation and often experience high temperatures during the cutting process. This study investigated the influence of temperature on the wear of conical picks and proposed a method for measuring rock abrasiveness that takes into account the thermal effect. The experimental results showed that cooling liquid reduced the maximum temperature and the mean mass loss of the conical pick. Additionally, the study examined the characteristics of oxygen and found evidence of peeling, cracking, and oxidation on the grinding rod used for rock abrasiveness measurement.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Vivek Srivastava, Deependra Singh, A. G. Rao, V. P. Deshmukh
Summary: Engine gear failures are a significant concern in various industries. Investigating each gear failure and determining the root cause is important for preventing future failures. This study used experimental and numerical analysis techniques to investigate the premature failure of a flywheel gear in a marine diesel engine. The findings revealed that the gear failed due to overload stresses caused by overload torque generated from sudden inertial thrust in the internal combustionengine.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jun Zhang, Weidong Liu, Feilong Liu, Zhiqiang Yang, Jinfang Peng, Minhao Zhu
Summary: During a major overhaul of an aeroengine, a cracked stator vane of the low-pressure compressor was discovered, with the crack originating from a corrosion pit located on the arc transition between the leading edge and the upper edge plate. The fracture surface exhibited signs of fatigue cracks, indicating a pit-related fatigue crack. Metallographic examination revealed that most corrosion pits were distributed beneath the bulging or peeling paint layer on the leading edge and the concave side. Identification of the corrosion products showed the presence of sulfate and alumina, suggesting atmospheric corrosion as a likely cause for the cracked stator vane.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Juan Jose Jimenez de Cisneros Fonfria, Ester Olmeda, Susana Sanz, Maria Garrosa, Vicente Diaz
Summary: Energy absorbing devices in vehicles can partially transform impact energy and protect passengers. In this paper, the failure analysis of the underframe crumple zone in a train car was conducted through finite element simulations, showing that the component acted properly after the impact.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Fengqi Zhang, Gang Luo, Haiyang Zhang, Peihong Cong, Lulu Liu, Wei Chen
Summary: In this study, a predictive model for bird strike trajectory was developed based on the quasi-linear viscoelastic model. By combining simulation analysis under multiple conditions, the model reproduced the trajectory change law in low and medium speed bird impact experiments.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
S. M. de Gouveia, L. de Abreu Correa, D. B. Teles, M. Oliveira, T. G. R. Clarke
Summary: Emergency Shutdown Valves (EDSVs) are used in industrial applications to interrupt fluid flow during hazardous events. The damage to the valve seats can be detected by analyzing the pressure and torque data. This study compared three processing options and found that evaluating the complete signature with a Gradient Boosting Classifier algorithm is the most effective strategy.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xinyan Jin, Kai Wang, Hongwei Qian
Summary: This study investigated the root cause of an abnormal premature groove-clogging failure on a sink roll in a hot-dip galvanizing line. It was found that the failure was caused by the buildup of a large amount of Fe2Al5Znx dross in the grooves, and the key factor was the control of Tstrip.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Zhiqiang Li, Jie Li, Cen Li, Xiaodong Xie, Zhiyong Yang
Summary: In this study, the microstructure evolution of the material in the hot spot area of the high-speed train brake disc was observed and the mechanism of mechanical property degradation was obtained through tensile tests. The research results provide guidance for crack damage identification of the brake disc and condition-based maintenance.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Lijia Luo, Yincheng Wang, Wei Chen, Zuming Zhao, Wenfei Chen, Shiyi Bao
Summary: Tube-to-tube impact wear is a significant factor in the failure of alloy 690 tubes in nuclear steam generators. This paper investigates the wear damage mechanism and detection method of alloy 690 tubes under tube-to-tube impact loads. The results reveal the wear damage mechanism through analysis of macro and micro morphologies as well as metallographic structures. A nonlinear ultrasonic wave mixing method is proposed for damage detection and a detection device is developed to implement this method. Experimental results indicate that the damage mode of tube-to-tube impact wear varies with impact load and cycle number, and the nonlinear modulation index is effective in assessing the damage degree of alloy 690 tubes.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xing-Ju Yang, Feng Lin, Xu Du, Lu Qiu
Summary: This paper proposes a novel method of improving the progressive collapse resistance of RC frame structures by adding locally debonded kinked steel plates (KPs). Experimental tests and finite element analysis reveal that the addition of KPs significantly enhances the ultimate resistance and deformability of the beam-slab substructures. The mechanism of resistance improvement is explained, and an analytical model is developed for predicting the ultimate resistance of the structures.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xiaohe Wang, Zengqiang Cao
Summary: This paper presents a dynamic installation (DI) method based on electromagnetic force to reduce damage to composite laminates and improve joint performance. The study shows that DI can effectively decrease installation resistance, reduce severe damage to laminates, and improve stress distribution in the joint.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jitong Cui, Yingying Kong, Cuiwei Liu, Baoping Cai, Faisal Khan, Yuxing Li
Summary: This paper presents a method for quantifying the failure probability of hydrogen doped pipelines and utilizes Bayesian network for quantitative calculation. The results show that this method can more accurately assess the failure probability of hydrogen doped pipelines and provide a decision basis for preventing failure accidents.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Yiping Jiang, Maoru Chi, Jungang Yang, Liangcheng Dai, Yuchen Xie, Zhaotuan Guo
Summary: This article investigates and simulates the derailment of empty freight trains at the switch section of a turnout in the diverging route, and proposes preventive measures. The results show that the derailment is caused by the combined effect of various factors, and reducing the longitudinal coupler force and the wheel rail friction coefficient can decrease the possibility of derailment. Additionally, installing a guard rail in front of the turnout can effectively prevent derailment.
ENGINEERING FAILURE ANALYSIS
(2024)
