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Evaluating road work site safety management: A case study of the Amman bus rapid transit project construction 评估道路施工现场的安全管理:安曼快速公交项目施工案例研究
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-21 DOI: 10.1080/23311916.2023.2283320
L. Shbeeb
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引用次数: 0
Toward optimizing scientific workflow using multi-objective optimization in a cloud environment 在云环境中使用多目标优化技术优化科学工作流程
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-19 DOI: 10.1080/23311916.2023.2287303
Shabina Ghafir, M. A. Alam, Farheen Siddiqui, Sameena Naaz, S. S. Sohail, D. Madsen
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引用次数: 0
Technology capability of Indonesian medium-sized shipyards for ship production using Product-oriented Work Breakdown Structure method (case study on shipbuilding of Mini LNG vessel) 印度尼西亚中型造船厂利用面向产品的工作分解结构法进行船舶生产的技术能力(小型液化天然气船造船案例研究)
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-18 DOI: 10.1080/23311916.2023.2284534
Buana Ma’ruf, M. I. Mustajib, A. Bisri, Suwahyu Suwahyu, E. Suwarni, N. Nurcholis, Rina Rina, Syaiful Bahri, Moh. Muria Armansyah Sugiarto, Bagus Fadhilah Nur Imani, Shinta Jihar Akif Rahadi
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引用次数: 0
NREL Phase VI wind turbine blade tip with S809 airfoil profile winglet design and performance analysis using computational fluid dynamics 利用计算流体动力学进行 NREL 第六阶段风力涡轮机叶尖 S809 翼面翼片设计和性能分析
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-18 DOI: 10.1080/23311916.2023.2293562
Girma Dejene, V. Ancha, A. Bekele
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引用次数: 0
Revisiting multi-domain empirical modelling of light-emitting diode luminaire 重新审视发光二极管灯具的多域经验模型
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-14 DOI: 10.1080/23311916.2023.2288423
S. K R, Tanuja Shailesh
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引用次数: 0
Analysis of probabilistic optimal power flow in the power system with the presence of microgrid correlation coefficients 存在微电网相关系数的电力系统中概率最优电力流分析
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-12 DOI: 10.1080/23311916.2023.2292325
Farhad Zishan, Ehsan Akbari, O. Montoya
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引用次数: 0
Congestion management ancillary service at the distribution level through grid-connected microgrid based on DLMP and HFPSO-TOPSIS approach 基于 DLMP 和 HFPSO-TOPSIS 方法的并网微电网配电级拥塞管理辅助服务
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-08 DOI: 10.1080/23311916.2023.2288411
Kalyani Makarand Kurundkar, G. Vaidya
Abstract The rising use of electric mobility has weakened the relationship between wholesale energy prices and price-responsive demand such as charging Electric vehicles (EV). This adversely affects network flows. The situation can further worsen, causing congestion in the distribution network and a rise in energy prices. In this paper, an attempt is made to resolve this issue through Distributed generators (DGs) placed in a grid-connected microgrid. The authors propose a methodology based on “Distribution Locational Marginal pricing (DLMP)” and the use of “Hybrid optimal Firefly Particle Swarm Optimization” with “TOPSIS” (HFPSO-TOPSIS) approach for optimal DG sizing in this methodology. The methodology consists of two stages. The first stage is locating DGs on the bus, and the second stage is sizing DGs and their participation in providing ancillary service of congestion management through a grid-connected microgrid. The method is tested on a “modified IEEE 33 bus radial active distribution system”. Two different system conditions in which congestion can occur are analyzed and congestion is successfully removed by this proposed method. Power Loss reduction of more than 75% is achieved in each case after the implementation of the proposed methodology. Minimization of voltage deviation and maximization of voltage stability is achieved. The generation cost is minimized by almost 70%. The results obtained show better performance of HFPSO-TOPSIS as compared with other existing techniques. The results obtained exhibit that the methodology is generic and can be implemented for any congestion condition and can successfully remove congestion with improvement in system performance bringing social welfare.
电动汽车使用的增加削弱了批发能源价格与价格响应需求之间的关系,例如充电电动汽车(EV)。这会对网络流量产生不利影响。这种情况可能进一步恶化,导致配电网堵塞和能源价格上涨。本文试图通过在并网微电网中设置分布式发电机来解决这一问题。作者提出了一种基于“分配位置边际定价(DLMP)”的方法,并使用“混合优化萤火虫粒子群优化”与“TOPSIS”(hpso -TOPSIS)方法来优化DG的规模。该方法包括两个阶段。第一阶段是在公交车上定位dg,第二阶段是确定dg的规模,并通过并网微电网参与提供拥堵管理辅助服务。该方法在“改进的IEEE 33总线径向有源配电系统”上进行了试验。分析了可能发生拥塞的两种不同系统情况,并成功地消除了拥塞。在实施所建议的方法后,每种情况下的功率损耗降低了75%以上。实现了电压偏差最小化和电压稳定性最大化。发电成本降低了近70%。实验结果表明,与现有的其他方法相比,HFPSO-TOPSIS具有更好的性能。结果表明,该方法具有通用性,可适用于任何拥堵状况,并能成功消除拥堵,提高系统性能,带来社会福利。
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引用次数: 0
Dynamic investigation of 650 W roof-top horizontal wind turbine rotor system supported by radial permanent magnet bearings 由径向永磁轴承支撑的 650 W 屋顶水平风力涡轮机转子系统的动态研究
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-08 DOI: 10.1080/23311916.2023.2288436
G. Chalageri, S. Bekinal, M. Doddamani
Abstract The present work focuses on the rotor dynamic properties of a 650 W roof-top horizontal axis windturbine (HAWT) rotor supported by radial permanent magnet bearings (PMBs). Radial PMBs were designed and optimized concerning the rotor of a wind turbine for maximum stiffness. Initially, a generalized design and optimization process for multi-ring radial PMBs (MrRPMBs) with a radial air gap is presented to get the maximized force and stiffness per magnet volume. The proposed mathematical model is validated using the Finite Element (FE) analysis tool Ansys for chosen rotor dimensions. Then, the same optimization technique was extended for HAWT rotor bearings to extract the optimized multi-ring radial bearing parameters. The dynamic investigation is performed to study the effect of bearing parameters on the rotor-bearing modal frequency and dynamic amplitude of a rotor. Firstly, the dynamic investigation was performed for the conventional deep groove ball bearings (DGBs) supported rotor, considering the effect of bearing span length. Secondly, the dynamic response was analyzed for the rotor system through a hybrid bearing set (HBS) by replacing DGB with PMB. Finally, DGBs are completely replaced by radial PMBs. FEanalysis was performed using the Ansys workbench rotor dynamic tool for all the bearing combinations.
摘要本文研究了径向永磁轴承支撑的650 W屋顶水平轴风力发电机(HAWT)转子的动力学特性。针对某型风力机转子,以最大刚度为目标,对径向PMBs进行了优化设计。首先,提出了具有径向气隙的多环径向永磁磁体的广义设计与优化过程,以获得最大的单位磁体体积的力和刚度。采用有限元分析工具Ansys对所选转子尺寸进行了验证。然后,将同样的优化技术扩展到HAWT转子轴承,提取优化后的多环径向轴承参数。通过动力学研究,研究了轴承参数对转子的模态频率和动幅值的影响。首先,考虑轴承跨长的影响,对传统深沟球轴承(DGBs)支承转子进行了动力学研究。其次,分析了以PMB代替DGB的混合轴承组(HBS)转子系统的动态响应。最后,dgb完全被径向pmb所取代。利用Ansys workbench转子动力学工具对所有轴承组合进行有限元分析。
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引用次数: 0
Modeling of Thermal Performance and Mechanical Properties of Concrete Blocks Incorporating Plastic Bottle Waste with Crushed Clay Bricks as Coarse Aggregates 以塑料瓶废料和碎粘土砖为粗骨料的混凝土砌块热性能和机械性能建模
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-07 DOI: 10.1080/23311916.2023.2283334
Abla Marie-Josée Nadège Kougnigan, John Mwero, Raphael Mutuku
Abstract This research aims to examine the mechanical characteristics and thermal performance of concrete masonry blocks made from clay waste bricks that have been crushed, used as coarse aggregates, and incorporated plastic bottles. A simulation of the heat transfer of blocks was also made using Finite Element Method. The study uses plastic bottles of 350 ml of volume and clay brick waste as a complete replacement for traditional aggregates to produce lightweight concrete. The blocks utilized in the study were 150 mm × 200 mm×400 mm in size. The blocks underwent testing for various properties such as water absorption, ultrasonic pulse velocity, density, compressive strength, and thermal conductivity to ASTM C140 standards. The incorporation of plastic bottles created 23% voids in the blocks for the density test, and the results revealed that the block’s performance met the ASTM C129 standards for load-supporting blocks with regard to its capacity to absorb water (134.9 kg/m3), lightness, and strength (12MPa). Additionally, the study revealed a decrease in thermal conductivity by more than 50% compared to conventional concrete blocks without bottles; a result which was confirmed by the blocks’ heat transfer simulation. In conclusion, based on the fact that the blocks studied met the mechanical standards for load-bearing masonry units, it is proposed that the construction sector consider incorporating these types of blocks in areas where heat insulation is necessary to reduce building energy consumption related to cooling.
摘要本研究旨在研究粘土废砖破碎后作为粗集料,并加入塑料瓶制成的混凝土砌块的力学特性和热性能。采用有限元法对砌块的传热进行了模拟。该研究使用350毫升体积的塑料瓶和粘土砖废料作为传统骨料的完全替代品来生产轻质混凝土。研究中使用的砌块尺寸为150 mm× 200 mm×400 mm。根据ASTM C140标准,对这些块体进行了各种性能测试,如吸水率、超声波脉冲速度、密度、抗压强度和导热性。在密度测试中,塑料瓶的加入使砌块产生了23%的空隙,结果表明,砌块的吸水能力(134.9 kg/m3)、重量和强度(12MPa)符合ASTM C129承重砌块的标准。此外,研究表明,与不使用瓶子的传统混凝土块相比,导热性降低了50%以上;这一结果得到了砌块传热模拟的证实。总之,基于所研究的砌块符合承重砌体单元的机械标准这一事实,建议建筑部门考虑将这些类型的砌块纳入需要隔热的区域,以减少与冷却相关的建筑能耗。
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引用次数: 0
Studying hydrodynamic friction in the oil ring/cylinder liner contact of an internal combustion engine 研究内燃机油环/缸套接触处的流体动力摩擦
IF 1.9 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-12-07 DOI: 10.1080/23311916.2023.2289261
Brahim Menacer, Sunny Narayan, Faisal O. Mahroogi
Abstract The main goal of the contemporary automotive industry is to improve efficiency and reduce harmful emissions of internal combustion engines. Approximately 25% of the total mechanical losses in engines are attributed to friction in the piston rings.Therefore, in all modern engines, a twin land oil control ring (TLOCR) is used due to its affordable cost and satisfactory performance in oil regulation under low workload conditions. In this work, a model for the oil control ring (TLOCR) was proposed, which takes into account ring elastic deformation. The TLOCR model was used to evaluate friction produced in piston ring assembly and the results were compared to the experiment data obtained from a single cylinder diesel engine. The model was based on correlation between the lubricating oil pressure and oil film thickness developed. The behavior of lubricant oil was investigated for different engine operational conditions and different tensions in the rings. Both experimental and numerical modeling data showed a good match, thereby validating the proposed model
当代汽车工业的主要目标是提高内燃机的效率和减少有害气体的排放。大约25%的发动机机械损耗是由于活塞环的摩擦造成的。因此,在所有现代发动机中,由于其成本合理且在低工作量条件下具有令人满意的油调节性能,因此采用双陆地油控制环(TLOCR)。在此基础上,建立了考虑环弹性变形的控油环模型。采用TLOCR模型对活塞环总成产生的摩擦进行了评估,并将结果与单缸柴油机的实验数据进行了比较。该模型建立在润滑油压力与油膜厚度的相关性基础上。研究了润滑油在不同发动机工况和不同环张力条件下的性能。实验数据和数值模拟数据吻合良好,验证了模型的有效性
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Cogent Engineering
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