Volume 2: Computer Technology and Bolted Joints; Design and Analysis最新文献_第7页

Evaluation of Pipe Flange Connection Assembly Efficiencies Using Common Tools and Patterns 使用通用工具和模式评估管道法兰连接装配效率

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-78696

Shane Szemanek, Scott R. Hamilton

{"title":"Evaluation of Pipe Flange Connection Assembly Efficiencies Using Common Tools and Patterns","authors":"Shane Szemanek, Scott R. Hamilton","doi":"10.1115/pvp2022-78696","DOIUrl":"https://doi.org/10.1115/pvp2022-78696","url":null,"abstract":"\u0000 ASME PCC-1 (2010) introduced 5 different alternative bolting patterns in contrast to the Legacy Pattern that is commonly known as the “Star Pattern”. For the past 15 years, research has shown that these Alternative Patterns issued by PCC-1 are more efficient than the Star Pattern.\u0000 However, the research has shown tool movement around the flange to show efficiency, but not actual assembly time and/or assembly time savings from each one of these alternative bolting patterns.\u0000 While all of these alternative bolting patterns are not appropriate for every gasket type and might not add efficiency for smaller diameter flanges, there are many mid-stream and downstream petrochemical applications that could benefit from further knowledge of these efficiencies.\u0000 The goal of this paper is to not only determine which one of these alternative patterns is the most efficient but to also compare different types of assembly tools with each pattern.\u0000 This analysis does not address the accuracy and repeatability of each method and tool type, but its function is to determine the optimum combination of tool and pattern selection to decrease downtime and Lost Profit Opportunity (LPO).\u0000 This paper will use both bolting patterns and assembly tools on an 18” 600 Class flange, that has (24) 1-1/4” studs to develop a method for determining further testing of bolting pattern and bolting tools.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80153904","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

Metal Additive Manufacturing Simulation Using Sequentially Coupled Thermo-Mechanical Analysis 基于顺序耦合热-力学分析的金属增材制造仿真

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84612

J. Nakai-Chapman, C. Fietek, J. Sakai, Young-Bae Park

{"title":"Metal Additive Manufacturing Simulation Using Sequentially Coupled Thermo-Mechanical Analysis","authors":"J. Nakai-Chapman, C. Fietek, J. Sakai, Young-Bae Park","doi":"10.1115/pvp2022-84612","DOIUrl":"https://doi.org/10.1115/pvp2022-84612","url":null,"abstract":"\u0000 Additive manufacturing (AM) has become one of the most revolutionary technologies for the fabrication of metallic parts within the industry; notably, the use of existing metals has significantly eased the adoption of AM in manufacturing. The metal AM method can produce complex parts with effective cost. This process, however, involves rapid heating and solidification, resulting in a high thermal gradient. It causes undesired residual stress and distortion that significantly affects the final product’s integrity. This study investigates the features of a high thermal gradient, structural deformation, and residual stress involved in the powder bed fusion process in virtual environments. Powder bed fusion is an additive manufacturing method that uses a laser or electron beam to melt and fuse the metal material to form a three-dimensional part. A simulation model was developed using layer-to-layer scanning paths based on a 3D geometry in the 3DEXPERIENCE platform. Commercial finite element analysis (FEA) software, Abaqus CAE, is used for the sequentially coupled thermo-mechanical analysis. The temperature history is first calculated in an uncoupled thermal analysis and introduced as a predefined field in the subsequent structural analysis. In the sequentially coupled thermo-mechanical analysis, the thermal evolution of the problem affects the structural response, but the temperature field is not dependent on the stress field. Heat transfer in additive manufacturing is time-dependent, and temperature distribution in an additively manufactured part is non-uniform. Hence a time-dependent heat conduction problem is solved to analyze the process. After the thermal analysis is completed, the quasi-static equilibrium of stress is determined for each time step. An isotropic hardening rule was utilized to consider the evolution of plastic deformation.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83854299","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

Numerical Study on Buckling Behaviors of Thin-Walled Longitudinal Corrugated Cylindrical Shells Under Axial Compression Loads 轴向压缩载荷作用下薄壁纵向波纹圆柱壳屈曲行为的数值研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84396

He Ma, Zhiping Chen, P. Jiao, Xinyi Lin

{"title":"Numerical Study on Buckling Behaviors of Thin-Walled Longitudinal Corrugated Cylindrical Shells Under Axial Compression Loads","authors":"He Ma, Zhiping Chen, P. Jiao, Xinyi Lin","doi":"10.1115/pvp2022-84396","DOIUrl":"https://doi.org/10.1115/pvp2022-84396","url":null,"abstract":"\u0000 Thin-walled cylindrical shell structures are widely used in various engineering fields due to their highly efficient load carrying capacity. This kind of structures is prone to buckling failure when subjected to axial compression loads. Machining the shell into corrugated shape is an effective method to prevent buckling. Rational design of corrugated shells can improve the load carrying efficiency of shell structures. However, there are few studies focused on the effects of various parameters on the longitudinal corrugated cylindrical shell buckling. In this paper, numerical studies are performed to analyze the factors affecting the buckling behaviors of thin-walled longitudinal corrugated cylindrical shells under axial compression loads. The cross section of the corrugated shell is obtained by superposing the sine curve on the reference circle. The critical buckling load, buckling mode and imperfection sensitivity of the longitudinal corrugated cylindrical shells are examined and compared with ordinary cylindrical shells. The effects of shell dimensions and material yield strength are taken into account. In addition, the influence of cross section shape parameters on the critical buckling load is considered, including the amplitude A and wave number k. Results show that the axial load carrying capacity of longitudinal corrugated cylindrical shells is better than ordinary cylindrical shells, and rational design of cross section shape can enhance the stability of corrugated shells. This work can provide some reference for relevant experimental studies. Furthermore, it can also give some guides for the application of thin-walled longitudinal corrugated cylindrical shells in actual engineering.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80579540","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

Design Modification Implementations for Mitigating the Reactor Inner Zone Inlet Header Temperature in CANDU Reactor Units 降低CANDU反应堆机组内区入口压头温度的设计修改实施

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-85985

Preston Tang, Bing Li, Akash Bhatia, Leon Cramer

{"title":"Design Modification Implementations for Mitigating the Reactor Inner Zone Inlet Header Temperature in CANDU Reactor Units","authors":"Preston Tang, Bing Li, Akash Bhatia, Leon Cramer","doi":"10.1115/pvp2022-85985","DOIUrl":"https://doi.org/10.1115/pvp2022-85985","url":null,"abstract":"\u0000 The Reactor Inner Zone Inlet Header (RIZIH) temperatures have raised more rapidly in the CANDU units in general, compared to the original aging predictions. This adverse trend is caused by a degradation mechanism that affecting heat exchange efficiency in certain areas of the process systems. The main contributor to the RIZIH temperature increase is the fouling in the preheaters and steam generator/boilers due to magnetite deposits on tube internal diameters. The RIZIH temperature rise had caused units de-rates to ensure the reactor safety and comply with the regulatory requirements. As reported in a previous PVP paper (PVP2017-65096), multiple design alternatives were considered and evaluated to address the adverse condition, the best design option with a piping modification by adding external feedwater bypass of high pressure heater was selected to improve RIZIH temperature control. Following the conceptual engineering, preliminary design and detail design, the engineering change was implemented in two CANDU reactor units between 2018 and 2019. This paper reports out the field physical implementations and discusses the effectiveness of the design change on mitigating the RIZIH temperature rise, it also presents the operational and financial benefits actualized through observations of the two implementing units.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"52 7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73486010","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

Evaluation of Localized Stresses at Spherical Pressure Vessel-to-Column Support Junction Using Closed-Form Equations 用封闭方程计算球形压力容器-柱支撑连接处局部应力

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84890

Vivek Manjrekar

{"title":"Evaluation of Localized Stresses at Spherical Pressure Vessel-to-Column Support Junction Using Closed-Form Equations","authors":"Vivek Manjrekar","doi":"10.1115/pvp2022-84890","DOIUrl":"https://doi.org/10.1115/pvp2022-84890","url":null,"abstract":"\u0000 Spherical pressure vessels (spheres) are widely used for storing liquids and gases at high pressures. The post plates of column-supported spheres are subjected to additional loads imposed by the supporting columns. The resulting localized stresses at column-to-post plate junction are difficult to analyze using analytical methods. Numerical techniques, such as the finite element method (FEM) are generally used to analyze the local discontinuity stresses.\u0000 In this work, a finite element parametric study is performed using a wide range of sphere geometries. The stresses at various locations around the column attachment are investigated. The influence of various loadings on the local stresses is also investigated. The internal membrane forces and bending moments obtained from the finite element model are then used to establish the dimensionless curves. A step-by-step procedure and the closed-form equations are provided to calculate membrane stresses, bending stresses and the combined stresses. A table of load factors is included to estimate the maximum vertical and horizontal loads on post plate due to wind or seismic forces. Finally, a sample problem is presented to illustrate the analysis procedure. Using this easy-to-use analysis approach, the design engineers will be able to calculate the localized stresses in sphere post plates without having to utilize the finite element method.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75012306","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

Assessment of Safety Valve Escape Pipework 安全阀泄放管道系统评估

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84858

W. Vorster, J. Roy, Daniel G. Gilroy, Jack A. Pollock, David M. Clarkson, A. J. Beveridge, Alistair Strong

{"title":"Assessment of Safety Valve Escape Pipework","authors":"W. Vorster, J. Roy, Daniel G. Gilroy, Jack A. Pollock, David M. Clarkson, A. J. Beveridge, Alistair Strong","doi":"10.1115/pvp2022-84858","DOIUrl":"https://doi.org/10.1115/pvp2022-84858","url":null,"abstract":"\u0000 This paper discusses fitness for purpose (FfP) structural integrity assessments of Safety Relief valve (SRV) vent pipes that were inadequately designed and maintained. The FfP assessments identified several latent errors with the pipework design. The absence of a fault schedule in combination with the latent errors led to a discernable anomaly in the safety case which was finally address but resulted in long outage delays and spiraling costs due to the large number of assessments, inspections and modifications required to achieve and demonstrate integrity.\u0000 The FfP assessments discussed here consider all failure mechanisms which were identified as being relevant during steam discharge. These include plastic collapse, ratchetting, creep rupture and creep-fatigue and required a series of complex assessments to sentence the SRV pipes for return to service. The Computational Fluid Dynamics (CFD), pipe stress analysis and Finite Element Modeling (FEM) required to demonstrate integrity are discussed. The plant modification and repair solutions required to achieve integrity before the pipes could be returned to service are presented. The method used to apply CFD loads to pipe stress models without double accounting for static pressure stresses in the Finite Element Analyses (FEA), is describe here. Novel analysis techniques used to speed up assessments and the historic plant data reviews that were required to substantiate the claims on historic damage are reviewed.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86789137","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

Bifurcation Buckling Analysis and Non-Linear Collapse Analysis of Teardrop Shaped Vacuum Chamber 泪滴型真空室的分岔屈曲分析及非线性坍塌分析

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-82187

Hao Jiang, C. Barbier, B. Riemer

{"title":"Bifurcation Buckling Analysis and Non-Linear Collapse Analysis of Teardrop Shaped Vacuum Chamber","authors":"Hao Jiang, C. Barbier, B. Riemer","doi":"10.1115/pvp2022-82187","DOIUrl":"https://doi.org/10.1115/pvp2022-82187","url":null,"abstract":"\u0000 The Spallation Neutron Source (SNS) accelerator is being upgraded to increase the beam power from 1.4MW at 1GeV to 2.8MW at 1.3GeV. The currents in the middle two injection chicane magnets cannot simply be scaled up to accommodate the increased injection energy of 1.3GeV due to potential excessive H− stripping; the magnets must be replaced with longer, lower-field magnets and the associated vacuum chambers need to be redesigned. A new teardrop-shaped vacuum chamber was initially designed to accommodate the new magnets and the updated beam paths and instrumentation. This paper focuses on the structural stability study of the teardrop shape vacuum chamber based on buckling analysis. Protection against collapse from buckling according to the ASME BPVC requirement has been evaluated in depth. First, a Type-1 bifurcation buckling analysis using a linear eigenvalue solution to determine the critical load factor was performed. Subsequently, a Type-3 nonlinear collapse analysis was conducted using the static Riks method with elastic-plastic material properties and imperfections explicitly considered in the model geometry. The critical buckling load for the teardrop shape vacuum chamber was confidently estimated based upon this two-stage approach.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"08 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78163857","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

Evaluation of Flashing Jet Impact on Surroundings Due to Leakage of High Pressure Pipes 高压管道泄漏时闪光射流对周围环境冲击的评价

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-80253

T. Yuasa, Shun Watanabe, R. Morita

引用次数: 0

CFD Study of Cooking Liquor Blow for Piping Thrust Force and Risk of Condensation Hydraulic Shock 蒸煮液吹气对管道推力及冷凝液压冲击危险性的CFD研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-79373

Andrew Carlson, C. Narayanan, D. Lakehal, Timo Hermonen, Noora Jokinen, J. Ikävalko

{"title":"CFD Study of Cooking Liquor Blow for Piping Thrust Force and Risk of Condensation Hydraulic Shock","authors":"Andrew Carlson, C. Narayanan, D. Lakehal, Timo Hermonen, Noora Jokinen, J. Ikävalko","doi":"10.1115/pvp2022-79373","DOIUrl":"https://doi.org/10.1115/pvp2022-79373","url":null,"abstract":"\u0000 This study is an interesting industrial case study for the application of a validated flashing and hydraulic shock modelling approach to the safety and design of a reactor blow line. The maximum flow rate is important for sizing of downstream components. The high pressure of the blow and flashing of the liquid can result in significant forces on pipe bends and other geometrical features. Analysis and prediction of such forces are of importance for the structural design and anchoring of the piping. Another concern for a liquid blow under high pressure is the potential for condensation-induced hydraulic shock. The collapse of the flashed vapor to the liquid phase creating shock waves of large amplitudes is a serious safety concern.\u0000 The CFD model used the homogeneous mixture model with a flashing model for phase change of the fluid. The properties of the fluid were defined by a custom function which interpolated between tabulated values of the thermodynamic and transport properties. The CFD simulations confirmed the risk of condensation hydraulic shock when the blow down is initiated with empty pipes and also demonstrated that a hydraulic shock could be prevented with liquid-filled condition. The pipework geometry was also optimized to reduce the forces acting at the junctions. The vapour quality at the outlet as a result of flashing was estimated which is necessary for the design of downstream systems.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83123281","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

Fatigue Analysis of Nuclear Class-1 Small-Bore Piping Connections in CANDU Reactors CANDU反应堆核1类小口径管接头疲劳分析

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84938

S. A. Rehman, Ahmed R. Alian, Najmul H. Abid

{"title":"Fatigue Analysis of Nuclear Class-1 Small-Bore Piping Connections in CANDU Reactors","authors":"S. A. Rehman, Ahmed R. Alian, Najmul H. Abid","doi":"10.1115/pvp2022-84938","DOIUrl":"https://doi.org/10.1115/pvp2022-84938","url":null,"abstract":"\u0000 Class 1 nuclear piping systems, small-bore piping branch connections are susceptible to high thermal fatigue stresses, particularly in cases where harsh thermal transients are present. Calculating the Cumulative Usage Factor (CUF) using the procedure defined in the ASME Boiler and Pressure Vessel Code in Section III NB-3600 can limit the permissible cycle life (i.e., fatigue life) of the piping component. As per NB-3630(c), when a design does not satisfy the requirements of NB-3640 and NB-3650, a more detailed alternative analysis defined in NB-3200 can be used. This work compares the code requirements, analysis methodology, and results of a typical small bore branch connection connected to a piping header that is assessed against the requirements of NB-3600 and NB-3200. Piping is modeled using beam elements by utilizing PIPESTRESS piping analysis software for the NB-3600 based analysis. In comparison, a finite element model in Ansys Workbench is developed for the NB-3200 transient thermal and structural analysis. Representative pressure and thermal transients applicable to the heat transport system of a typical CANDU reactor are utilized in the analysis. The analysis results show that a significant drop in the Cumulative Usage Factor is achieved with the NB-3200 approach when compared with NB-3600.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82863029","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