发布求助
文献互助 智能选刊 最新文献

Engineering Transactions最新文献

筛选
英文 中文
Application of 1-D and 2-D Discrete Wavelet Transform to Crack Identification in Statically and Dynamically Loaded Plates 一维和二维离散小波变换在静、动载荷板裂纹识别中的应用
Engineering Transactions Pub Date : 2020-03-04 DOI: 10.24423/ENGTRANS.1115.20200304
A. Knitter-Piątkowska, M. Guminiak
{"title":"Application of 1-D and 2-D Discrete Wavelet Transform to Crack Identification in Statically and Dynamically Loaded Plates","authors":"A. Knitter-Piątkowska, M. Guminiak","doi":"10.24423/ENGTRANS.1115.20200304","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1115.20200304","url":null,"abstract":"The paper presents the problem of damage detection in thin plates while considering the influence of static and dynamic characteristics, especially with regard to the modes of vibration as well as the excitation by static loads. The problem of Kirchhoff plate bending is described and solved by the Boundary Element Method (BEM). Rectangular plates supported on boundary or plates supported on boundary and resting on the internal columns are examined. A defect is introduced by the additional edges forming a crack in the plate domain. The analyses of static and dynamic structural responses are carried out with the use of Discrete Wavelet Transform (DWT). Signal decomposition according to the Mallat pyramid algorithm is applied. To obtain a more adequate input function subjected to DWT the white noise disturbing the signal is considered together with the structural response. In the dynamic experiments the plate undergoes vibrations similar to natural modes. The measured variables are static deflections and vertical displacement amplitudes. All of them are established at internal collocation points distributed alongside the line parallel to selected plate edge.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"137-157"},"PeriodicalIF":0.0,"publicationDate":"2020-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41543200","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: 1
Investigations on Tensile and Flexural Characteristics of Fly Ash and Banana Fiber-Reinforced Epoxy Matrix Composites 粉煤灰与香蕉纤维增强环氧基复合材料拉伸弯曲性能研究
Engineering Transactions Pub Date : 2020-02-19 DOI: 10.24423/ENGTRANS.1086.20200219
V. Gopalan, Shashank Sharma, A. Jangid, V. Pragasam, Nilesh Satonkar, P. Chinnaiyan
{"title":"Investigations on Tensile and Flexural Characteristics of Fly Ash and Banana Fiber-Reinforced Epoxy Matrix Composites","authors":"V. Gopalan, Shashank Sharma, A. Jangid, V. Pragasam, Nilesh Satonkar, P. Chinnaiyan","doi":"10.24423/ENGTRANS.1086.20200219","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1086.20200219","url":null,"abstract":"Polymer matrix composites (PMCs) generally use the inorganic and non-biodegradable materials as reinforcements. This paper presents a PMC with reinforcement of fly ash and banana fiber. The epoxy resin is used as a matrix. This paper investigates the influences of the percentage of fly ash, the percentage of banana fiber and the size of banana fiber on tensile and flexural behaviors of fly ash and banana fiber reinforced epoxy matrix composite. Taguchi’s orthogonal array is used in the design of the experiments in the sample preparations. Analysis of variance (ANOVA) is employed to find the significance of input parameters on tensile and flexural behaviors.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"89-101"},"PeriodicalIF":0.0,"publicationDate":"2020-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43012143","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: 4
Bending of Beams with Consideration of a Seventh-Order Shear Deformation Theory 考虑七阶剪切变形理论的梁弯曲
Engineering Transactions Pub Date : 2020-02-14 DOI: 10.24423/ENGTRANS.1129.20200214
K. Magnucki, W. Stawecki, E. Magnucka-Blandzi
{"title":"Bending of Beams with Consideration of a Seventh-Order Shear Deformation Theory","authors":"K. Magnucki, W. Stawecki, E. Magnucka-Blandzi","doi":"10.24423/ENGTRANS.1129.20200214","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1129.20200214","url":null,"abstract":"The subject of the paper is a simply- supported prismatic beam with bisymmetrical crosssections under non-uniformly distributed load. The shapes of the cross-sections and the nonuniformly distributed load are described analytically. The individual seventh-order shear deformation theory-hypothesis of the planar beam cross-sections is assumed. Based on the principle of stationary potential energy two differential equations of equilibrium are obtained. The system of the equations is analytically solved, and the shear and deflection coefficients of the beam are derived. Moreover, the shear stress patterns for selected cross-sections are determined and compared with stresses determined by Zhuravsky’s formula. The results of example calculations are presented in tables and figures.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"119-135"},"PeriodicalIF":0.0,"publicationDate":"2020-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49407921","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: 2
Lightweighting of Wishbone Finite Element Analysis 叉骨轻量化有限元分析
Engineering Transactions Pub Date : 2020-02-11 DOI: 10.24423/ENGTRANS.1069.20200211
Shuxian Wang, P. L. Chong, D. Hughes
{"title":"Lightweighting of Wishbone Finite Element Analysis","authors":"Shuxian Wang, P. L. Chong, D. Hughes","doi":"10.24423/ENGTRANS.1069.20200211","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1069.20200211","url":null,"abstract":"This paper focuses on lightweighting of wishbone structure for ordinary 5-seated commercial vehicle. Typically, the wishbone structure is made of high carbon steel and the aim is to investigate if the composite materials, such as E-Glass/Epoxy, Carbon/Epoxy and Boron/Epoxy, can achieve the lightweighting purpose without compromising material strength. The study is carried out through finite element package (Siemen NX) with the consideration of three different loading conditions, namely, lateral braking force, vertical and longitudinal braking force. Throughout the study, it is found that both Carbon/Epoxy and Boron/Epoxy composites is able to reduce the weight of the component by 46% while maintaining the required strength.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"103-114"},"PeriodicalIF":0.0,"publicationDate":"2020-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48618222","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: 1
Spectral Quasilinearization Method for Solution of Convective Heating Condition 求解对流加热条件的谱拟线性化方法
Engineering Transactions Pub Date : 2020-01-02 DOI: 10.24423/ENGTRANS.1062.20200102
W. Ibrahim
{"title":"Spectral Quasilinearization Method for Solution of Convective Heating Condition","authors":"W. Ibrahim","doi":"10.24423/ENGTRANS.1062.20200102","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1062.20200102","url":null,"abstract":"This article aims to implement the spectral quasilinearization method to examine the impact of a second-order slip flow and convective heating on boundary layer flow and heat transfer of a nanofluid over an extensible surface. The mathematical modeling of the flow problem is obtained by taking into consideration the weight of leading parameters. Similarity conversions are employed in converting the leading partial differential equations to non-linear high-order ordinary differential equations. These equations were numerically computed using a spectral quasilinearization method for different values of the main parameters. The interesting numerical outcomes are attained for the flow variables, as well as the skin friction coefficient, local Nusselt number and Sherwood number. The results designate that the skin friction coefficient $C_f$ falls as the values of slip parameter $gamma$ rise, it improves as the values of $delta$ boost. Both the local Nusselt number, $theta'(0)$ , and Sherwood number, $phi'(0)$, drop as both Brownian motion and thermophoresis parameters increase. A comparison of the spectral quasilinerization method (SQLM) with the bvp4c method is conducted and an excellent agreement in their output is observed.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"69-87"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45569523","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: 4
Implementation of Fuzzy PID Controller in Cascade with Anti-Windup to Real-Scale Test Equipment for Pavements 模糊PID串级抗卷绕控制器在路面实景测试设备上的实现
Engineering Transactions Pub Date : 2020-01-02 DOI: 10.24423/ENGTRANS.1066.20200102
O. Reyes-Ortiz, J. S. Useche-Castelblanco, G. L. Vargas-Fonseca
{"title":"Implementation of Fuzzy PID Controller in Cascade with Anti-Windup to Real-Scale Test Equipment for Pavements","authors":"O. Reyes-Ortiz, J. S. Useche-Castelblanco, G. L. Vargas-Fonseca","doi":"10.24423/ENGTRANS.1066.20200102","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1066.20200102","url":null,"abstract":"In the industry and academia, large-scale equipment has been developed, which requires control systems that provide safety and efficiency with the lowest possible energy consumption. In the industrial cascade control system, nested controllers have been a versatile tool for the control of large-scale equipment. Research shows that these types of controllers improve their performance with the integration of artificial intelligence algorithms and prevention methods against controller saturation. For this reason, this paper presents the development of a fuzzy proportional-integral-derivative (PID) controller in cascade with anti-windup (AW) for full-scale test equipment for pavements. In this study, the mathematical expressions for the equipment, the design of the controller and additional systems for comparison, simulation and analysis are developed. The main objective is to test the functionality of this type of nested controllers for these systems.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"3-19"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49120997","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: 1
Analysis and Optimization of Radiant Cooling Panel with Wave-Type Embedded Pipes 波型埋管辐射冷却板的分析与优化
Engineering Transactions Pub Date : 2020-01-02 DOI: 10.24423/ENGTRANS.1035.20200102
R. Prasanna, P. Moorthy, A. Krishnan, Venkatesh Balakrishnan
{"title":"Analysis and Optimization of Radiant Cooling Panel with Wave-Type Embedded Pipes","authors":"R. Prasanna, P. Moorthy, A. Krishnan, Venkatesh Balakrishnan","doi":"10.24423/ENGTRANS.1035.20200102","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1035.20200102","url":null,"abstract":"In this study, the radiant cooling panel with wave-type pattern pipes is analyzed and optimized through Taguchi’s design of experiments methods and grey relation method for better performance. Radiant cooling panel’s bottom surface temperature and temperature non-uniformity index are considered as the quality objective functions. Control parameters such as pipe length, the spacing between the pipes, radiant panel thickness, pipe bent radius, pipe diameter, insulation layer thickness, pipe material, panel material, insulation material, and mass flow rate of water entering the pipe are included as the control parameters of the optimization study. The performance of radiant cooling panels is analyzed through numerical simulation technique- computation fluid dynamic (CFD) method. The numerical simulation is carried out in the Fluent software, and the CFD code is checked for grid independence and validation. Through single and multi-objective optimization, the best design of the radiant cooling panel is identified, and a confirmation test is also conducted. Finally, an analysis of variance (ANOVA) calculation is made and it is found that the mass flow rate of water entering the pipe is the most influencing parameter on the performance of the radiant cooling panel.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"47-67"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47111360","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: 3
Three-Dimensional Analysis of Laminated Plates with Functionally Graded Layers by Two-Dimensional Numerical Model 基于二维数值模型的功能梯度层合板三维分析
Engineering Transactions Pub Date : 2020-01-02 DOI: 10.24423/ENGTRANS.1063.20200102
P. Pluciński, J. Jaśkowiec
{"title":"Three-Dimensional Analysis of Laminated Plates with Functionally Graded Layers by Two-Dimensional Numerical Model","authors":"P. Pluciński, J. Jaśkowiec","doi":"10.24423/ENGTRANS.1063.20200102","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1063.20200102","url":null,"abstract":"This work presents a three-dimensional (3D) numerical analysis of multi-layered laminated plates in which selected layers may be made of functionally graded material (FGM), in which the Young’s modulus may change along the thickness as a consequence of a continuous and graded mixture of two materials. For the analysis, the method, known as FEM23, is applied, which uses a two-dimensional (2D) mesh, yet enables obtaining full 3D results for the layered structure. In FEM23, the layered structure may be a combination of thin and thick layers made of materials with significantly different properties. This paper presents two examples comparing the results to other numerical or analytical solutions. The examples confirm the correctness and flexibility of FEM23 for laminated plates with functionally graded layers.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"68 1","pages":"21-45"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44716166","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: 3
The Impact of Temperature Oscillations and Heat Transfer Conditions in Thick-Walled Elbows and Tubes on the Local Stress-Strain Behaviour During the Fast Start-Up of Power Boilers 厚壁弯头和管内温度振荡和传热条件对动力锅炉快速启动过程中局部应力-应变行为的影响
Engineering Transactions Pub Date : 2019-12-06 DOI: 10.24423/ENGTRANS.896.20191210
J. Okrajni, K. Wacławiak
{"title":"The Impact of Temperature Oscillations and Heat Transfer Conditions in Thick-Walled Elbows and Tubes on the Local Stress-Strain Behaviour During the Fast Start-Up of Power Boilers","authors":"J. Okrajni, K. Wacławiak","doi":"10.24423/ENGTRANS.896.20191210","DOIUrl":"https://doi.org/10.24423/ENGTRANS.896.20191210","url":null,"abstract":"The paper presents results of tests designed for predicting the behaviour of components subjected to variable temperature and mechanical loading conditions. Elbows and tubes, as examples of components widely used in power plant pipelines, have been examined. This analysis includes a description of model characteristics, the operating parameters of devices under industrial conditions, and the results of computational modelling (FEM).","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"67 1","pages":"579-591"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45980224","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: 3
Experimental and Theoretical Study on Screwed Connections in Cold-Formed Steel Structure 冷弯型钢结构螺纹连接的试验与理论研究
Engineering Transactions Pub Date : 2019-11-19 DOI: 10.24423/ENGTRANS.1016.20191119
Rattanasak Hongthong, Apai Benchaphong, Sutera Benchanukrom, N. Konkong
{"title":"Experimental and Theoretical Study on Screwed Connections in Cold-Formed Steel Structure","authors":"Rattanasak Hongthong, Apai Benchaphong, Sutera Benchanukrom, N. Konkong","doi":"10.24423/ENGTRANS.1016.20191119","DOIUrl":"https://doi.org/10.24423/ENGTRANS.1016.20191119","url":null,"abstract":"This research aims to study the fastening rotation behavior of cold-formed steel screw connections by experimental testing and analytical modelling. Both the experimental test and finite element results showed the failure modes of tilting and bearing failure. The rotation failure mode of the screw connection was studied by an analytical method using a spring model with screw-plate stiffness which included the bending and shear stiffness of the screw and the bearing stiffness of the screw and plates. Variation in the screw thread diameter, plate thickness, and plate thickness ratio are assigned to the spring model for the parametric study. The screw rotation or tilting was primarily controlled by the plate thickness. Presented results show that to decrease the effect of tilting failure, the end of the screw should be embedded within the thickest side of the cold-formed steel parts.","PeriodicalId":38552,"journal":{"name":"Engineering Transactions","volume":"67 1","pages":"557-577"},"PeriodicalIF":0.0,"publicationDate":"2019-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47168328","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: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信