Journal of Pressure Vessel Technology最新文献_第3页

Experimental and Numerical Study On the Protection Efficiency of a Diamond-shaped Thermal Jacket for Gun Barrels 枪管菱形隔热套保护效率的实验和数值研究

Journal of Pressure Vessel Technology Pub Date : 2024-03-26 DOI: 10.1115/1.4065174

Q. Sun, Jie Zhang, Run Xie, Guolai Yang

{"title":"Experimental and Numerical Study On the Protection Efficiency of a Diamond-shaped Thermal Jacket for Gun Barrels","authors":"Q. Sun, Jie Zhang, Run Xie, Guolai Yang","doi":"10.1115/1.4065174","DOIUrl":"https://doi.org/10.1115/1.4065174","url":null,"abstract":"\u0000 Experimental and numerical investigations on the protection efficiency of a diamond-shaped thermal jacket made of the certain braided composites with anisotropic material properties for gun barrels were carried out to gain an insight into its thermal-structural behavior and performance. The experiments for the gun barrels with and without the thermal jacket subjected to unilateral thermal radiation were conducted on a thermal jacket protection efficiency experimental system. Three-dimensional finite element models were established to perform the thermal-structural analysis and approximate the temperature distribution and thermal deformation of the shrouded gun barrel and bare gun tube. The experimental results validated the numerical models for the study of solar radiation on the thermal-structural characteristics of the gun barrels with and without the thermal jacket. The temperature changes together with their gradients, and the thermal deformation of the gun tube shrouded with the thermal jacket were notably less than that of the bare gun tube. The non-uniform temperature distribution caused by unilateral radiation can be substantially ameliorated by the thermal jacket. The developed diamond-shaped thermal jacket owned satisfactory protection effectiveness. In addition, moderately increasing the thermal jacket's thickness or the air gap between the thermal jacket and gun tube can decrease the muzzle deflection of the shrouded gun barrels. The work is promising in providing both theoretical and practical contributions in design of shrouded tank gun barrels aiming at achieving high first shot accuracy.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":"74 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140378030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic flux leakage defect identification method for small-diameter pipeline elbow based on the improved YOLOv5 基于改进型 YOLOv5 的小直径管道弯头磁通量泄漏缺陷识别方法

Journal of Pressure Vessel Technology Pub Date : 2024-03-21 DOI: 10.1115/1.4065122

Haodong Qin, Ying Zhang, Pengcheng Zhao, Yongtao Zhao, Jipei Sun, Chuanyu Pan

{"title":"Magnetic flux leakage defect identification method for small-diameter pipeline elbow based on the improved YOLOv5","authors":"Haodong Qin, Ying Zhang, Pengcheng Zhao, Yongtao Zhao, Jipei Sun, Chuanyu Pan","doi":"10.1115/1.4065122","DOIUrl":"https://doi.org/10.1115/1.4065122","url":null,"abstract":"\u0000 The elbow is an important constituent of oil and gas pipeline systems and plays a key role in changing the direction of pipelines. Corrosion defects pose a significant risk to the safe operation of elbows. Magnetic flux leakage (MFL) detection has been developed as a suitable technique for identifying defects in pipelines. To address the distortion of elbow defect signals in the images arising from variations in the lift-off value of the leakage detector, this paper proposed an image identification method based on an improved YOLOv5 network. The differences in defect images are simulated by analysing the lift-off value of the magnetization unit. A defect image enhancement method of multiscale retinex with colour restoration fusion homomorphic filtering (MSRCR-HF) is employed to enhance the features of defective MFL signal images. To further improve the accuracy of the model, the YOLOv5 network is optimized by integrating the convolutional block attention module (CBAM) and the space-to-depth-nonstrided convolution (SPD-Conv) module. The results show that the proposed image enhancement method effectively accentuates the features of defect images. Moreover, the suggested image identification method exhibits superior accuracy in identification. The mean average precision (mAP) values for the original image set and the enhanced image set are 85.0% and 91.4%, respectively. Consequently, the proposed method is shown to be highly viable for the automatic identification of MFL defects in small-diameter pipe elbows.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":" 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140220724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Fatigue Parameters On Fatigue Crack Growth Rate of Pipe Steels and Girth Weld 疲劳参数对钢管和环缝焊接疲劳裂纹生长率的影响

Journal of Pressure Vessel Technology Pub Date : 2024-03-21 DOI: 10.1115/1.4065135

Dong-Yeob Park, Jie Liang

{"title":"Effects of Fatigue Parameters On Fatigue Crack Growth Rate of Pipe Steels and Girth Weld","authors":"Dong-Yeob Park, Jie Liang","doi":"10.1115/1.4065135","DOIUrl":"https://doi.org/10.1115/1.4065135","url":null,"abstract":"\u0000 Oil and gas pipeline steels and welds are subjected to a wide variety of cyclic loadings: internal pressure variation, pulsation of gas pressure resulting from the cyclic operation of a reciprocating compressor at a gas compressor station, internal flow-induced vibration resulting from the turbulent flow within the pipe, vortex-induced vibration of a free-spanning section exposed to air (wind) for aboveground pipelines or water for water-crossing pipelines, and cyclic thermal stresses developed by significant changes in temperature due to seasonal changes or changes in operating temperatures. These cyclic loadings are very variable and complex. Considering the fatigue situations, a better understanding of the effects of fatigue test parameters on fatigue behaviors of pipeline steels and welds is required. Hence, in this study, the influences of fatigue test parameters on the Paris law coefficients were studied for pipeline steels and welds. It was analyzed for pipe steels of X65~X100 and a girth weld of X70. Influences of material strength, crack orientation relative to the pipe axis, and frequency in the range of 1~30 Hz were insignificant. It was found that the coefficients a1 and b2 of the m-ln(C) relationships linearly relied on the load ratio. The constants (α1, β1, α2, and β2) of these linear relationships between R-ratio and a1 (and b2) were determined for pipe steels.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":" 62","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140221165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Damage Analysis and Start-Up Schedule Optimization of Steam Turbine Rotors With an Anisotropic Damage Coupled Viscoplastic Constitutive Model 利用各向异性损伤耦合粘塑性结构模型对蒸汽轮机转子进行损伤分析和启动时间表优化

Journal of Pressure Vessel Technology Pub Date : 2024-03-16 DOI: 10.1115/1.4065121

Yuanliang Wang, Y. Ni, YanQing Liao, Hong Xu

{"title":"Damage Analysis and Start-Up Schedule Optimization of Steam Turbine Rotors With an Anisotropic Damage Coupled Viscoplastic Constitutive Model","authors":"Yuanliang Wang, Y. Ni, YanQing Liao, Hong Xu","doi":"10.1115/1.4065121","DOIUrl":"https://doi.org/10.1115/1.4065121","url":null,"abstract":"\u0000 The optimization of the operation scheme is of great significance for improving the flexibility of thermal power plants in energy systems dominated by renewable energy. However, thermal stress and corresponding thermo-mechanical fatigue damage are the main limitations. A unified viscoplastic constitutive model coupled with anisotropic damage is introduced and validated by comparing the experimental and simulated hysteresis loops and cyclic softening curves. The model is implemented into the ANSYS software by using the USERMAT subroutine to numerically investigate the high-temperature fatigue behavior of a 1000MW steam turbine rotor on different start-up schedules. The critical areas of the rotor are studied in terms of temperature, stress, accumulated inelastic strain, and damage. Based on the damage analysis, the hot start schedule is optimized and validated. The startup time can be significantly shortened within permitted fatigue damage. Moreover, the life expenditure under different loading-up rates is calculated and the extra start-up costs can be evaluated accordingly for wider application.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":"33 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140236122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Failure Pressure Evaluation of Corroded Pipeline Using Semi-Empirical and Finite Element Analysis 利用半经验分析和有限元分析评估腐蚀管道的失效压力

Journal of Pressure Vessel Technology Pub Date : 2024-02-29 DOI: 10.1115/1.4064696

Juliana v. S. Torres, R. Motta, S. Afonso, Nadège Bouchonneau, Paulo R. M. Lyra, R. Willmersdorf, Júlio T. Pimentel

{"title":"Failure Pressure Evaluation of Corroded Pipeline Using Semi-Empirical and Finite Element Analysis","authors":"Juliana v. S. Torres, R. Motta, S. Afonso, Nadège Bouchonneau, Paulo R. M. Lyra, R. Willmersdorf, Júlio T. Pimentel","doi":"10.1115/1.4064696","DOIUrl":"https://doi.org/10.1115/1.4064696","url":null,"abstract":"\u0000 Computational simulation using the finite element method (FEM) has proven to be one of the most efficient methods for the correct evaluation of the structural integrity of pipelines with corrosion-induced defects. In this paper, the results of the failure pressure of corroded pipelines obtained with a computer tool called PIPEFLAW based on nonlinear finite element analyses are presented and compared with the failure pressures of corroded pipes obtained with twelve (12) advanced semi-empirical models from the literature. A computational code was created in the Python language to automatically obtain the failure pressure of randomly generated cases of corroded pipes, which allows the analysis of multiple piping cases with isolated external corrosion defects in an idealized configuration. For this purpose, the LHS (Latin Hypercube Sampling) approach was adopted for the design of experiments to obtain a better distribution of cases in the sample space. Comparisons between the results using the FEM and semi-empirical models show, as expected, that the semi-empirical solutions are more conservative in most cases analyzed in this work. A statistical model is proposed that adheres to the relative error distribution for some of the models used. Moreover, the influence of some parameters (pipeline thickness, defect depth, defect length, defect width, yield stress and ultimate stress) on the failure pressure was evaluated. It was found that in most of the studied models the error increases as the defect depth increases.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":"25 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion Fatigue Behavior of 6000 HP Fracture Pump of the Valve Body Under Different Plunger Stroke Times and Acid Fracture Fluid Environment 6000 马力断裂泵阀体在不同柱塞冲程时间和酸性断裂流体环境下的腐蚀疲劳行为

Journal of Pressure Vessel Technology Pub Date : 2024-02-26 DOI: 10.1115/1.4064697

G. Wang, Xinming Wen, Gang Hu, Mingcheng Wang

引用次数: 0

Large Deformation Dynamic Characteristics of Cracked Laminated Panel and Improvement of Stiffness Using Shape Memory Alloy Fiber 裂纹层压板的大变形动态特性及使用形状记忆合金纤维改善刚度

Journal of Pressure Vessel Technology Pub Date : 2024-02-26 DOI: 10.1115/1.4064698

Erukala Kalyan Kumar, Pritam Pattanayak, S. Panda

{"title":"Large Deformation Dynamic Characteristics of Cracked Laminated Panel and Improvement of Stiffness Using Shape Memory Alloy Fiber","authors":"Erukala Kalyan Kumar, Pritam Pattanayak, S. Panda","doi":"10.1115/1.4064698","DOIUrl":"https://doi.org/10.1115/1.4064698","url":null,"abstract":"\u0000 This study explores the investigation of the nonlinear dynamic responses or time-dependent deflection analysis of a laminated composite shell panel integrated with a shape memory alloy (SMA), considering both undamaged and damaged set-ups. The primary focus of this research is to examine the impact of SMA incorporation on the structural behavior of the parent configuration, aimed at enhancing its structural stiffness. To ensure the validity of the proposed model, sensitivity analyses and numerical validations are presented. The mathematical framework employed in this study employs the higher-order shear deformation theory (HSDT), which offers enhanced accuracy in capturing the intricate behaviors of these shell panels. The dynamic responses are obtained using the Newmark average acceleration method. Numerical simulations are carried out using a dedicated MATLAB code developed in-house, allowing amplified correctness in outcomes and widespread analysis. The study thoroughly assesses a range of geometric parameters and those relevant to SMA for both intact and impaired shell panels. The outcomes of the investigation reveal affirmative findings, underscoring notable improvements in structural strength and enhanced nonlinear dynamic responses through the introduction of SMA reinforcement into the composite shell panel.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":"2 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140430343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Analysis of Bursting Pressure Prediction Methods for Steam Generator Tube With Volume Defect 有体积缺陷的蒸汽发生器管道爆破压力预测方法的比较分析

Journal of Pressure Vessel Technology Pub Date : 2024-02-26 DOI: 10.1115/1.4064699

Yile Han, Song Huang, Hu Hui

引用次数: 0

Analytical Formulation to Predict Residual Stresses in Thick-Walled Cylinders Subjected to Hoop Winding, Shrink-Fit, and Conventional and Reverse Autofrettages 预测厚壁圆筒在箍筋缠绕、收缩配合以及传统和反向自动搪瓷过程中残余应力的分析公式

Journal of Pressure Vessel Technology Pub Date : 2024-01-27 DOI: 10.1115/1.4064579

Mohamed Elfar, R. Sedaghati, O. Abdelsalam

{"title":"Analytical Formulation to Predict Residual Stresses in Thick-Walled Cylinders Subjected to Hoop Winding, Shrink-Fit, and Conventional and Reverse Autofrettages","authors":"Mohamed Elfar, R. Sedaghati, O. Abdelsalam","doi":"10.1115/1.4064579","DOIUrl":"https://doi.org/10.1115/1.4064579","url":null,"abstract":"\u0000 Shrink-fit, wire-winding, and autofrettage processes and their combinations can be effectively used to increase the strength and fatigue life of metallic thick-walled cylinders for a given volume. While several numerical solutions have been developed for determining the residual stress profile through the thickness of thick-walled cylinders for different combinations of the shrink-fit and autofrettage processes, there are no analytical solutions available to predict the residual stress profile induced by the combination of the shrink-fit and inner and outer autofrettage processes with the hoop winding. In this study, the analytical formulations to predict the residual stress distribution for various combinations of the three processes (hoop-winding, shrink-fit, and autofrettage) have been formulated considering the same manufacturing sequences. The results demonstrate that combinations that include the wire-winding process significantly improve the residual stress profile through the wall thickness of single or two-layer thick-walled cylinders. Specifically, when the wire-winding process is included, the residual stress at the inner surface increases by 25% in single-layer configurations and by 12% in two-layer thick-walled cylinders, respectively, compared to configurations without the wire-winding process.","PeriodicalId":513862,"journal":{"name":"Journal of Pressure Vessel Technology","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139592606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-Fluid-Coupled Analysis of Double Fillet Welds On Tube Membrane Panels During Submerged Arc Welding 埋弧焊过程中管膜面板双角焊缝的热流体耦合分析

Journal of Pressure Vessel Technology Pub Date : 2024-01-27 DOI: 10.1115/1.4064578

Bon Seung Koo

引用次数: 0