Article
Engineering, Mechanical
A. O. Ibrahim, O. O. Ighodaro, S. K. Fasogbon, E. F. Orumwense, M. A. Waheed
Summary: This paper investigates the causes of failure in the tubes of a dual fired steam boiler used in a Food and Beverage manufacturing plant. The analysis reveals decarburization and grain growth on the outer diameter of the tubes, as well as pitting and thermal oxidation on the internal diameter. Uneven heat distribution is attributed to corrosion from scaling on the outer diameter. The failure mechanism involves significant localized corrosion and uneven heat distribution.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Green & Sustainable Science & Technology
Mohsen Yazdi, Mohammad Hasan Khoshgoftar Manesh
Summary: This study investigates the generation of electricity through solar Rankine cycle thermal power plants using direct steam-generating collectors. A two-tank indirect heat storage system is employed to ensure continuous power generation even when there is no solar energy. The results of various analyses conducted on the power generation cycle components are reported.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Nuclear Science & Technology
Jiuwu Hui, Jun Ling, He Dong, Gaixia Wang, Jingqi Yuan
Summary: This paper investigates the dynamics and heat transfer process in the vertical U-tube natural circulation steam generator and develops a model system validated with operational data from a Chinese nuclear power plant. The calculated thermodynamic properties of the saturated steam at the outlet of the steam generator agree well with measured values, indirectly validating the accuracy of the model system. A model-based dynamic simulation software for the steam generator is developed to obtain real-time distribution of heat transfer coefficient, pressure, temperature, and speed of the working medium.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Nuclear Science & Technology
Sung Il Kim, Hyung Seok Kang, Young Su Na, Eun Hyun Ryu, Rae Joon Park, Joo Hwan Park, Yong Mann Song, JinHo Song, Seong Wan Hong
Summary: The importance of evaluating radionuclide releases to the environment from operating nuclear power plants has increased in the Republic of Korea following the 2015 amendment to its Nuclear Safety Act. In this study, analysis of a thermally induced steam generator tube rupture accident caused by a severe accident was conducted with MELCOR, and computational fluid dynamics analysis was performed to simulate natural circulation phenomena in the reactor coolant system. Sensitivity calculations were also performed on uncertain parameters to evaluate the CsOH release fraction to the environment without passing through containment.
NUCLEAR ENGINEERING AND DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Z. H. Li, X. Y. Wang, C. Hong, Y. H. Lu, T. Shoji
Summary: The study on fatigue crack initiation and propagation behavior of Inconel Alloy 690TT steam generator tube under 0.2% strain amplitude was conducted using SEM, EBSD detector, and XFEM. The main crack was found to initiate at the discontinuous interface between PSBs and the matrix in the grain at the edge, transgranularly transiting to the lateral surface and propagating rapidly perpendicular to the loading axis. Different fracture modes of specimen shape led to varying fatigue lives, with tubular specimens having lower fatigue life compared to bar specimens. The fatigue life of boat-shaped Alloy 690TT SG tube at 0.2% strain amplitude was measured at 11,476 cycles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nuclear Science & Technology
Peng Yue, Faming Fang, Peng Xu, Hongyun Xie, Qizhi Duan, Jiaping Lin, Liyang Xie
Summary: Nuclear power plant steam generator water level has nonlinear and lagging characteristics, and signal missing or abnormality may cause incorrect operational intervention or emergency shutdown. This study proposes a noise resistant signal reconstruction method based on deep residual shrinkage network, trained with historical sensor data, to provide supportive information for operators' decision-making and improve the safety of NPP assets.
ANNALS OF NUCLEAR ENERGY
(2023)
Article
Engineering, Multidisciplinary
Jorge Espin, Sebastian Estrada, Diego Benitez, Oscar Camacho
Summary: This work proposes a hybrid sliding mode controller approach for level control in nuclear power plant steam generators, integrating internal model control, sliding mode control, and gain scheduling using Takagi-Sugeno multimodel fuzzy systems. Process identification is treated as an optimization problem, and parallel processing algorithms like particle swarm optimization are employed. The new proposal achieves good performance in set-point tracking and disturbance rejection.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Nuclear Science & Technology
Tenglong Cong, Yiran Chen, Xiaojia Li
Summary: Research shows that reversed flow in a u-tube steam generator can increase the total pressure drop on the primary side and decrease the primary coolant flow rate. By using a fully 3D CFD model, critical mass flow rate for reversed flow as well as the changing fraction and location of reversed flow with mass flow rate can be obtained.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Nuclear Science & Technology
Xiaojia Li, Tenglong Cong, Yiran Chen, Xiang Zhang
Summary: Research shows that the reverse flow in low flow forced circulation is influenced by rolling conditions. The rolling amplitude and period have a significant impact on the reverse flow, while rolling has little effect on pitching. In certain conditions, the occurrence of reverse flow can be inhibited or more easily occur.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Nuclear Science & Technology
Ju Yeon Lee, Jeong Ik Lee
Summary: With the increasing share of renewable energy, there is a growing interest in flexible power sources and energy storage systems. This study proposes integrating Energy Storage Systems (ESS) into Nuclear Power Plants (NPP) to optimize cycles for load-following. The research found that diverting a certain percentage of inlet mass flow to ESS significantly reduces the overall output of the steam cycle.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Chemistry, Physical
Yongqiang Qian, Zhiling Luo, Yi Wang, Wei Zhang, Luzhuo Chen
Summary: Inspired by plant leaf, a photothermal composite based on MXene and silk is proposed, achieving water vapor transportation and self-adaptive functionality. An intelligent solar system is constructed utilizing the synergy of solar steam generator and actuator, showing promising application prospects and reference value for multi-functional photothermal devices in the future.
Article
Chemistry, Physical
Yongqiang Qian, Zhiling Luo, Yi Wang, Wei Zhang, Luzhuo Chen
Summary: We propose a photothermal composite based on MXene and silk, inspired by plant leaves, which has more functionality. The composite can mimic water transpiration, adapt to the external environment intelligently, and has good application prospects.
Article
Nuclear Science & Technology
Fuguang Liu, Erjuan Yang, Jipeng Chen, Yong Li, Zihao Mi, Xinglong Gong, He Huang
Summary: As a fourth-generation nuclear power equipment, the high-temperature gas-cooled reactor (HTGR) has a higher core outlet temperature compared to pressurized water reactors, making it prone to damage. This study proposes a design for a laser welding plugging system for the HTGR, which includes a laser generator, a multi-axis robot, and supporting devices. The feasibility of the system is validated through structural simulation and experimental testing.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Thermodynamics
James W. Lazenby, Eugene Shwageraus, Alexander J. White
Summary: This paper provides a thermodynamic analysis of an energy storage concept that couples thermal stores with the feedwater heating system of a nuclear-powered steam plant. The concept allows for flexible electrical output while maintaining constant reactor power, resulting in an equivalent electricity storage system. It falls under the category of 'generation-integrated energy storage,' which reduces storage costs and energy transformations. The analysis explores various options for thermal stores and considers the off-design behavior of cycle components.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2023)
Article
Energy & Fuels
Pengcheng Geng, Xiangsong Kong, Changqing Shi, Hang Liu, Jiabin Liu
Summary: This article introduces a method to improve the steam generator level control system in nuclear power plants by optimizing the controller parameters. The method, called knowledge-informed simultaneous perturbation stochastic approximation (IK-SPSA), uses adjacent iteration points information to optimize the system directly based on control performance measurements. The method improves the stability, safety, and economy of the control system.
Article
Computer Science, Artificial Intelligence
Jiabi Zheng, Zhenguo Yang, Wenyin Liu
Summary: This study introduces an Iterative Causal Structure Search algorithm for high-dimensional social tags, aiming to improve the association problem among the tags, especially in marketing tasks. With theoretical proof and experimental validation, the algorithm has shown promising results in practical applications.
NEURAL COMPUTING & APPLICATIONS
(2023)
Article
Computer Science, Hardware & Architecture
Yongwei Liao, Zhenguo Yang, Wenyin Liu
Summary: We propose a bi-residual network (BRNet) that extends the residual block with the aggregate connection to extract salient information and achieve global feature representation. BRNet can be used as a plug-and-play module in backbone networks like ResNet or combined with variants like SENet focusing on the trunk of ResNet. Experimental results on CIFAR, ImageNet, and COCO datasets demonstrate the significant performance of BRNet in various scenarios.
Article
Engineering, Mechanical
Jie Chen, Zhen-Guo Yang
Summary: New energy vehicles play an increasingly important role in energy conservation and environmental protection. A key device in new energy vehicles is the power module, which converts direct current into alternating current. However, the power module generates a significant amount of heat during operation, leading to the design and manufacturing of pin fin heat sinks with nickel-phosphorus coating to prevent thermal damage. Before being put into use, it is necessary to strictly evaluate the reliability of the pin fin heat sinks. During corrosion resistance tests, suspected corrosion defects were found, leading to the determination that the root cause of radial defects was the explosive release of local hydrogen in the nickel-phosphorus coating. Four typical manufacturing defects of the pin fin heat sinks were characterized and discussed, and effective countermeasures were proposed to improve plating quality. This research is also helpful in understanding the operating safety and reliability of new energy vehicles.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Chemistry, Physical
Chang Su, Tong-Tong Bi, Zhen-Guo Yang
Summary: The paper reports a failure of the TCR antenna baffle used to protect it from foreign objects. Cracking was found during routine maintenance after minimal operation, leading to a comprehensive failure analysis. The investigation reveals environmental stress cracking and bubbles as the main causes, and proposes solutions to prevent similar failures from occurring again, which have proven effective in reducing the number of failed antenna baffles.
Article
Engineering, Mechanical
Jie Chen, Zhen-Guo Yang
Summary: In this study, a DC-DC converter for new energy vehicles was designed, which utilized a specially designed copper-substrate bushing to fix the PCB and dissipate heat effectively. Through comprehensive characterization and failure analysis, the causes of inadequate pull-out force between the bushing and PCB pad after reflow soldering were determined, and corresponding countermeasures were proposed. The findings of this paper not only provide valuable references for avoiding similar problems, but also contribute to improving the product quality in future manufacturing processes.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Guang-Qing He, Xiao-Lei Yang, Yi Gong, Dong-Qing Lu, Jian-Guo Deng, Jia-Lei Gu, Qiong Wu, Zhen-Guo Yang
Summary: In this paper, the unexpected fracture of the hydraulic expansion mandrel during the expansion process in the steam generator of nuclear power plants was investigated. This fracture caused the internal bulge defect (IBD) in the expanding area of the heat exchange tube. The study found that the IBD area was more susceptible to stress corrosion cracking (SCC) and proposed countermeasures to prevent similar failures and ensure the expansion quality of the steam generator tubes.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Computer Science, Information Systems
Huang Jian, Yihao Chen, Li Yong, Zhenguo Yang, Xuehao Gong, Wang Fu Lee, Xiaohong Xu, Wenyin Liu
Summary: VQA systems have been successful in general scenarios, but are still in their infancy in the medical domain due to limited datasets. This paper introduces a new Patient-oriented VQA dataset, covering a complete treatment process. A Medical Knowledge-based VQA Network (MKBN) is proposed to answer questions based on images and a medical knowledge graph. Experimental results show that MKBN achieves state-of-the-art performance on the dataset.
INFORMATION PROCESSING & MANAGEMENT
(2023)
Article
Computer Science, Information Systems
Han Lin, Pinglu Zhang, Jiading Ling, Zhenguo Yang, Lap Kei Lee, Wenyin Liu
Summary: Multimodal sentiment analysis is used to judge the sentiment of multimodal data uploaded by Internet users on various social media platforms. Existing studies focus on the fusion mechanism of multimodal data but neglect the similarity between text and audio, text and visual, and the heterogeneity of audio and visual, leading to deviation in sentiment analysis. Additionally, irrelevant noise in multimodal data affects the effectiveness of fusion.
INFORMATION PROCESSING & MANAGEMENT
(2023)
Article
Computer Science, Artificial Intelligence
Qi Wang, Hongyu Deng, Xue Wu, Zhenguo Yang, Yun Liu, Yazhou Wang, Gefei Hao
Summary: TextCap aims to address the limitations of existing image captioning tasks by incorporating text content. We propose a lightweight captioning method called LCM-Captioner, which uses a feature-lightening transformation and a collaborative attention module to improve performance and efficiency.
Article
Computer Science, Artificial Intelligence
Gang Chen, Peipei Kang, Xingcai Wu, Zhenguo Yang, Wenyin Liu
Summary: This paper proposes an Adaptive Visual field Multi-scale Generative Adversarial Networks (GANs) Image Inpainting based on Coordinate-attention (AVMGC) method to address the challenge of image inpainting with large missing blocks. The method utilizes deformable convolutional networks and coordinate-attention mechanism to improve local visual consistency and global geometric contour generation. Experimental results show that the proposed method outperforms the baselines in terms of qualitative performance.
NEURAL PROCESSING LETTERS
(2023)
Article
Engineering, Multidisciplinary
Tong-Hao Jiang, Yi Gong, Zhen-Guo Yang
Summary: Methyl tert-butyl ether (MTBE) is an effective gasoline additive that enhances combustion and reduces pollution. The failure of the methanol distillation column in MTBE production plants was caused by severe damage to the support ring and abnormal perforations, which were intensified by the acidic medium. Investigations on the chemical composition, metallurgical structure, and hardness of the materials were conducted to identify the root cause, leading to successful countermeasures.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Engineering, Mechanical
Tong-Tong Bi, Chang Su, Zhen-Guo Yang
Summary: The gas relay containing two plastic balls is an important safety protection device of the high-voltage transformer. However, in one refueling cycle of a nuclear power plant, it was found that one plastic floating ball inside the relay leaked due to unqualified fusion process of two plastic hemispheres.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Computer Science, Information Systems
Zhenguo Yang, Huomin Dong, Faxiang Zhang, Shaodong Jiang, Jinwei Wang, Chang Wang, Chunxiao Wang
Summary: We propose a distributed optical fiber sensing event recognition scheme based on Markov Transition Field (MTF) and knowledge distillation. The event recognition algorithm is lightweight, fast, and highly accurate. The MTF algorithm converts event data into images, maintaining temporal correlation while highlighting visual differences. A two-stage knowledge distillation method compresses a large-scale model into a lightweight model with optimal learning capability. Experimental results show a 5.2% improvement in recognition rate and 96.6% accuracy using the compressed student model. The student model is small in size (1.4 MB), has a low parameter count (0.35 M), and low FLOPs (0.17 G). It achieves real-time monitoring on resource-limited devices with a single event recognition time of 0.129s.
Article
Medical Laboratory Technology
Jiuchao Zhang, Chen Wang, Zhenguo Yang, Yangfei Xiao, Xue Mi, Lina Zhu
Summary: The study investigated the correlations of peripheral blood Omentin-1 and leptin (LEP) levels with bone metabolism and plasma glucose in patients with type 2 diabetes mellitus (T2DM) complicated with osteoporosis (OP). The results showed that the levels of peripheral blood Omentin-1 and LEP were associated with bone metabolism and plasma glucose.
CLINICAL LABORATORY
(2023)
Article
Entomology
Zhenguo Yang, Zinan Wang, Jing Ni, Aisi Da, Daoyan Xie, Henry Chung, Yanjie Luo
Summary: Understanding how seasonal factors and photoperiodism affect pesticide toxicity is crucial for designing pest management strategies. This study found that the toxicity of two pesticides on the two-spotted spider mite Tetranychus urticae was season-dependent, with higher toxicity during spring and summer and lower toxicity during winter. However, the photoperiod regime did not significantly affect pesticide toxicity. Additionally, smaller body size was weakly correlated with higher pesticide toxicity.
INTERNATIONAL JOURNAL OF TROPICAL INSECT SCIENCE
(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)
