Volume 2: Computer Technology and Bolted Joints; Design and Analysis最新文献_第10页

Design of B16 Standard and Non-Standard Ring Type Joint Flange and Gasket B16标准和非标准环式连接法兰和垫圈的设计

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84883

S. Kataoka

{"title":"Design of B16 Standard and Non-Standard Ring Type Joint Flange and Gasket","authors":"S. Kataoka","doi":"10.1115/pvp2022-84883","DOIUrl":"https://doi.org/10.1115/pvp2022-84883","url":null,"abstract":"\u0000 Bolted flange joints using ring type joint (RTJ) gasket has been widely used in oil & gas industry especially for high pressure service less than and equals to 2500 psi or high temperature services. Recently performance of other types of gaskets, such as grooved metal and spiral wound gasket are increased and being reviewed, but RTJ is still a first option for many operators and designers. The flange and gasket design details are provided in ASME B16.5 and B16.47 and the details of the gasket and ring facing are provided in B16.20, however, field problem often occurs in construction site, especially the damage of the ring joint facing due to the overloading. Similar troubles have been reported in non-standard flange and when designing flange connection, additional attention should be paid in addition to the standard design procedure shown in ASME Sec.VIII div.1 Mandatory Appendix 2.\u0000 To provide a guideline to design the flange joint and determine appropriate bolt load, detailed review and study was conducted. First, past troubles related to ring type joint are introduced, such as gasket coining into flange groove, and groove deformation of spacer component. Second, to clarify the root cause of such troubles, design of B16 flange, especially ring joint gasket size and facing geometry is reviewed and show gasket sizing and stress states varies with flange size and rating. A series of finite element analysis was performed, and analysis results are reviewed in terms of gasket stress, gasket contact pressure, groove stress and deformation.\u0000 Finally, several recommendations on the determination of gasket size, flange groove dimension and initial tightening load are explained.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80302910","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

Effect of the Bending Stiffness of Bolted Flange Joints on the Dynamics of Aero-Engine Rotors 螺栓连接法兰的弯曲刚度对航空发动机转子动力学的影响

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84708

Linbo Zhu, H. Pan, Yilong Yang, A. Bouzid, Jun Hong

{"title":"Effect of the Bending Stiffness of Bolted Flange Joints on the Dynamics of Aero-Engine Rotors","authors":"Linbo Zhu, H. Pan, Yilong Yang, A. Bouzid, Jun Hong","doi":"10.1115/pvp2022-84708","DOIUrl":"https://doi.org/10.1115/pvp2022-84708","url":null,"abstract":"\u0000 Bolted flange joints are used to connect adjacent disks and drums in aero-engine rotors. The flange mating contact surfaces usually move relative to each other and deform when they are subjected to numerous combinations of loads during normal operation. Consequently, the local bending stiffness of the bolted flange joint is altered considerably affecting the overall rotor stiffness and therefore the rotor dynamics.\u0000 This paper presents a study on the effect of the bending stiffness of bolted flange joints on the dynamic characteristics of an aero-engine rotor. A method to calculate the bending stiffness is proposed using an equivalent model based on an axial spring and bending beam stiffnesses. The relationship of the structure geometry, loading and assembly conditions of the bolted flange joints, and the bending stiffness loss are obtained. Furthermore, a dynamic model of an aero-engine high-pressure compressor rotor is developed using the transfer matrix method that incorporates the bending stiffness effect of the bolted flange joint. Based on this model, the influence of bending stiffness on the natural frequency and the steady-state response is discussed. The results show that the stiffness loss of bolted flange joint has a significant impact on the rotor dynamics. The structure geometry, loading, and assembly conditions can be used to control the dynamic response of aero-engine rotors.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80399058","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

Investigation of Surface Finish Effect on Fatigue Strength of Carbon and Low Alloy Steels 表面光洁度对碳钢和低合金钢疲劳强度影响的研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84695

S. Asada, A. Hirano, Yun Wang, M. Itatani, M. Takanashi, Y. Nomura, Fumihiro Ochi, T. Ogawa

{"title":"Investigation of Surface Finish Effect on Fatigue Strength of Carbon and Low Alloy Steels","authors":"S. Asada, A. Hirano, Yun Wang, M. Itatani, M. Takanashi, Y. Nomura, Fumihiro Ochi, T. Ogawa","doi":"10.1115/pvp2022-84695","DOIUrl":"https://doi.org/10.1115/pvp2022-84695","url":null,"abstract":"\u0000 The subcommittees on Design Fatigue Curve (DFC) and Design Fatigue Curve 2 (DFC2) in Atomic Energy Research Committee of the Japan Welding Engineering Society (JWES) developed a new fatigue analysis method. A design fatigue curve by this method is established by applying factors on stress and cycles, which have been derived by statistical analysis, to the best-fit curve using tensile strength as a variable considering the mean stress correction called the Smith-Watson-Topper approach. For high cycle region, the variable amplitude effect of EN 13445 is employed.\u0000 This fatigue analysis method was brought to the JSME Code Committee, and the JSME reviewed this method, and decided to incorporate it into the JSME Environmental Fatigue Evaluation Method with some modifications including the fatigue strength reduction factor for surface finish effect. This paper addresses surface finish effect on fatigue strength of carbon and low alloy steels.\u0000 To perform further investigation for surface finish effect on fatigue strength of carbon and low alloy steels, the DFC3 Subcommittee was established with the support of a Japanese utility project. A series of fatigue tests for surface finish effect was performed for carbon and low alloy steels in the utility project, and the fatigue test data were evaluated by the DFC3 Subcommittee. In this paper, the series of fatigue tests are introduced and discussed. Finally, the validity for the fatigue strength reduction factor for surface finish effect developed by the JSME Committee has been confirmed based on the above fatigue tests.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"507 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77835476","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 of Hydrogen Leakage and Explosion in Hydrogen Refueling Station With Large Volume Hydrogen Storage Vessels 大容量储氢容器加氢站氢气泄漏爆炸的数值研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84464

Chen Lu, Jieyi Hu, Sheng Ye, C. Gu, Z. Hua

{"title":"Numerical Study of Hydrogen Leakage and Explosion in Hydrogen Refueling Station With Large Volume Hydrogen Storage Vessels","authors":"Chen Lu, Jieyi Hu, Sheng Ye, C. Gu, Z. Hua","doi":"10.1115/pvp2022-84464","DOIUrl":"https://doi.org/10.1115/pvp2022-84464","url":null,"abstract":"\u0000 Large volume multi-layered high pressure hydrogen storage vessel is one of the vital equipment in hydrogen refueling station. However, the possibility of leakage from container nozzles during service remains a safety concern. In this paper, a leakage model modified by the real gas equation of state and a three-dimensional (3D) computational fluid dynamics (CFD) model based on the real hydrogen refueling station layout are established to simulate the whole process of hydrogen diffusion and explosion after the large volume vessel leak. The influences of leakage direction, leakage height, hydrogen storage pressure and wind speed on the distribution of flammable hydrogen are studied, as well as the scope of overpressure harmful area is respectively predicted when the real hydrogen cloud is ignited at different times. Results indicate that the high-pressure hydrogen jet over 30MPa diffuses in a wide range near the surface under momentum control. And the smaller the leakage source height is, the more obvious the Coanda effect is. In addition, igniting after hydrogen leakage in a very short time (such as 0.5 s) will lead to higher maximum overpressure, and igniting after a long time will form a larger dangerous area. Compared with the seamless hydrogen storage cylinder group, the hydrogen explosion hazard of vertical large volume multi-layered hydrogen storage vessel is significantly alleviated after leakage. Also, setting a certain height of isolation walls outside the hydrogen storage area can effectively reduce the risk and consequences of accidents.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89005904","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

Level 3 Fitness for Service Assessment of Dented Pipes With Diameter Less Than 6.25 Inch 3级适用于直径小于6.25英寸的凹痕管的使用评定

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84935

K. Mostafa, A. Alian

{"title":"Level 3 Fitness for Service Assessment of Dented Pipes With Diameter Less Than 6.25 Inch","authors":"K. Mostafa, A. Alian","doi":"10.1115/pvp2022-84935","DOIUrl":"https://doi.org/10.1115/pvp2022-84935","url":null,"abstract":"\u0000 The aim of this paper is to investigate the parameters affecting the structural integrity for piping with dents anomalies. As per the requirements to part 12 of the API 579-1/ASME FFS-1, 2016 [1], level 1 and 2 fitness for service (FFS) assessment procedures can’t be used for dented pipe with diameter less than 6.25 inch. Such small size pipes can only be assessed using level 3 assessment procedure. The pipe was indented in the FEA model with a rigid indenter. The indented pipe was then evaluated under general collapse and local failure criteria under different loading combinations using the elastic plastic analysis approach. The pipe material is defined using a multi-linear isotropic hardening model as per Annex 3-D of ASME BPVC, sec. VIII, div. 2 [2]. The effect of nominal pipe size, pipe schedule, and dent’s radius of curvature and depth on the plastic strain, and strain ratio are studied. Following Taguchi design of experiments methodology [5], a partial factorial design was adopted to allow the investigation of multiple levels value for each parameter. This analysis uses a real-life dent profile which was measured using automatic ultrasound inspection (AUT) and fitted to a spherical profile. The significance of each parameter on the different measured responses is evaluated.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"400 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79676243","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

Diagnosis, Modelling and Assessment of Transient Pressure Events Based on Observed In-Field Evidence 基于现场观测证据的瞬态压力事件诊断、建模和评估

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-85658

T. J. Prewitt, M. Bednorz

{"title":"Diagnosis, Modelling and Assessment of Transient Pressure Events Based on Observed In-Field Evidence","authors":"T. J. Prewitt, M. Bednorz","doi":"10.1115/pvp2022-85658","DOIUrl":"https://doi.org/10.1115/pvp2022-85658","url":null,"abstract":"\u0000 Intermittent pipe movement due to transient pressure events including vapor column collapse or water hammer events can impart large strains into the pipe, cause damage to the support structure, damage coatings, and cause damage or failure of the pipe. This paper will present a method that has been used with success for determining the pipe stresses and strains and possible cause associated with a transient pressure event based on coating damage evidence gathered from in-field assessments. After constructing a hydraulic model of the piping system, various transient events were modelled to obtain resulting pressure over the transient event’s period at key points along the piping system, such as valves and elbows. A second, more refined finite element model was created to incorporate the pressure values to determine the resulting displacements and stresses to relate to the in-field measurements of the region in question. By comparing the displacements in the model to the field evidence, the models were calibrated, and evaluation of the likely cause of coating damage found in the field was able to be performed. Moreover, the stresses in the pipe during the event are able to be assessed which allows for damage assessments to be conducted and allows for corrective actions to take place. Transient events assessed ranged from valve openings and closures, pump start up, and vapor column collapse.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75302193","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

Experimental Study of Fluid Forces on Direct-Acting Relief Valves 直接作用溢流阀流体力的实验研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84469

Qingye Li, Chaoyong Zong, Fuwen Liu, Weihao Zhou, Xueguan Song

引用次数: 0

Design Modifications to the Explosive Destruction System Closure System 炸药销毁系统封闭系统的设计修改

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-01 DOI: 10.1115/pvp2022-82285

J. Ludwigsen, J. Stofleth, M. Tribble, R. Crocker

{"title":"Design Modifications to the Explosive Destruction System Closure System","authors":"J. Ludwigsen, J. Stofleth, M. Tribble, R. Crocker","doi":"10.1115/pvp2022-82285","DOIUrl":"https://doi.org/10.1115/pvp2022-82285","url":null,"abstract":"\u0000 The Explosive Destruction System (EDS), which was developed at Sandia National Laboratories, is a portable system used by the US Army to destroy recovered chemical munitions on site. The latest containment vessel is larger, much heavier and is expected to contain an explosive load over twice that of previous versions. The explosive rating for the vessel, based on the BPVC, is 24 pounds TNT for up to 1,131 detonations.\u0000 The EDS vessel consists of a stainless steel, thick wall cylindrical body with large flat doors on each end which contains the explosive detonation and the subsequent chemical treatment of the chemical agent. The vessel is sealed with a metal seal gasket located between each door and the cylinder. A three-part clamping system is used to secure each door to the cylinder at each end.\u0000 One of the design challenges for the EDS vessel is to ensure that the doors do not leak when the shock loads from the potentially very significant explosive loads impact the door. Previous versions of EDS vessels have experienced measurable transient displacement between the door and the vessel flanges that challenged the metal seal gasket to maintain a seal. To address the opening of the gap between the flanges during blast loadings, the door clamping system has been modified for this latest design referred to as P3. Only minor changes to the design were required and none to the operating procedure. Computer modeling of the new design predicts a significant reduction in the separation of the flanges when compared to a previous EDS vessels of similar design.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79664826","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 Investigation of Ductile Fracture in Pipelines Under Complex Loading Using a Phenomenological Damage Model 基于唯象损伤模型的复杂载荷下管道延性断裂数值研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2021-07-13 DOI: 10.1115/pvp2021-62017

Iago S. Santos, D. Sarzosa

引用次数: 0

Stress Analysis of Tubes During Die Expansion Process 管材扩模过程中的应力分析

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2021-07-13 DOI: 10.1115/pvp2021-61724

Zijian Zhao, A. Bouzid

{"title":"Stress Analysis of Tubes During Die Expansion Process","authors":"Zijian Zhao, A. Bouzid","doi":"10.1115/pvp2021-61724","DOIUrl":"https://doi.org/10.1115/pvp2021-61724","url":null,"abstract":"\u0000 In practical applications, the stress status of expanded tubes is a critical parameter to control leakage and stress corrosion cracking. Therefore, it is important to study and analyze the stress distribution generated from tube expansion. Unfortunately, there are only a few theoretical approaches available for estimating the stress distribution of formed tubes, especially for cases where the expansion is achieved with spherical and oval dies.\u0000 In this study, 3/8 stainless steel and copper tubes were expanded with an oval die in a designed test workbench, and the tangential and longitudinal strains were monitored during the expansion process. A new analytical approach is developed to estimate the stresses and strains in the expanded tube during the expansion process. The different expanded zones are treated using different theories. An axisymmetric finite element model as a numerical approach is used to analyze the stresses based on a multi-linear kinematic hardening behavior to validate the analytical approach.\u0000 In addition, the stresses in the expanded tube and the push force of the die are also provided by the analytical, numerical and experimental approaches. Finally, the results from the three approaches are in a relatively good agreement.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78028223","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