Applied and Computational Mechanics最新文献_第7页

Buckling of Shell Panels Made of Fiberglass and Reinforced with an Orthogonal Grid of Stiffeners 用正交加强筋网格加固玻璃钢壳板的屈曲

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.37768.3078

A. Semenov

引用次数: 2

Performance measure and tool for benchmarking metaheuristic optimization algorithms 测试元启发式优化算法的性能度量和工具

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.37664.3060

F. Schott, D. Chamoret, T. Baron, Sébastien Salmon, Y. Meyer

引用次数: 1

Finite Element Modelling and Simulation of the Hysteretic Behaviour of Single- and Bi-metal Cantilever Beams using a Modified Non-linear Beta-damping Model 用改进的非线性Beta阻尼模型对单金属和双金属悬臂梁滞回特性进行有限元建模和仿真

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.35420.2651

H. Tariq, Charles Rajakumar, Dichuan Zhang, C. Spitas

{"title":"Finite Element Modelling and Simulation of the Hysteretic Behaviour of Single- and Bi-metal Cantilever Beams using a Modified Non-linear Beta-damping Model","authors":"H. Tariq, Charles Rajakumar, Dichuan Zhang, C. Spitas","doi":"10.22055/JACM.2021.35420.2651","DOIUrl":"https://doi.org/10.22055/JACM.2021.35420.2651","url":null,"abstract":"This paper explores a novel non-linear hysteresis model obtained from the modification of the conventional Kelvin-Voigt model, to produce a non-viscous hysteretic behaviour that is closer to metal damping. Two case studies are carried out for a vibrating cantilever beam under tip loading (bending), the first considering a single uniform material and the second considering a bimetallic structure. The damping behaviour is studied in the frequency domain (constant damping ratio model vs. Kelvin-Voigt/ beta damping model) and time-domain (proposed modified hysteresis model vs. Kelvin-Voigt/ beta damping model). In the frequency domain, it was found that the Kelvin-Voigt model essentially damps out the displacement response of the modes more than the constant damping ratio model does. In the transient analysis, the Kelvin-Voigt model likewise produced unnaturally rapid damping of the oscillations for both the single- and bi-metal beam, compared to the modified hysteretic damping model, which produced a damping behaviour closer to actual metal behaviour. This was consistent with results obtained in the frequency domain.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":"7 1","pages":"1663-1675"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45816437","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

Nonlinear Vibration of an Electrostatically Actuated Functionally Graded Microbeam under Longitudinal Magnetic Field 纵向磁场下静电驱动功能梯度微梁的非线性振动

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.35504.2670

D. Hieu, N. Hoa, L. Q. Duy, N. T. Thoa

{"title":"Nonlinear Vibration of an Electrostatically Actuated Functionally Graded Microbeam under Longitudinal Magnetic Field","authors":"D. Hieu, N. Hoa, L. Q. Duy, N. T. Thoa","doi":"10.22055/JACM.2021.35504.2670","DOIUrl":"https://doi.org/10.22055/JACM.2021.35504.2670","url":null,"abstract":"In this work, we develop a model of an electrostatically actuated functionally graded (FG) microbeam under a longitudinal magnetic field based on the Euler-Bernoulli beam and nonlocal strain gradient theories to investigate the nonlinear vibration problem. The FG microbeam is placed between two electrodes, a DC voltage applied between the two fixed electrodes causes an electrostatic force to be exerted on the FG microbeam. The FG microbeam is composed of metal and ceramic in which the properties of these materials are assumed to change in the thickness direction according to the simple power-law distribution. The Galerkin method and the Hamiltonian Approach are employed to find the approximate frequency of the FG microbeam. The accuracy of the present solution is verified by comparing the obtained results with the numerical results and the published results in the literature. Effects of the power-law index, the material length scale parameter, the nonlocal parameter, the applied voltage and the magnetic force on the nonlinear vibration behaviour of the FG microbeam are studied and discussed.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":"7 1","pages":"1537-1549"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48775681","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: 10

Analysis and Recognition of Standards in Intelligent Hybrid Systems using Natural Computing 基于自然计算的智能混合系统标准分析与识别

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.37798.3089

Rodrigo Francisco Borges Lourenço, Roberto Outa, F. R. Chavarette, A. Gonçalves

引用次数: 0

Thermal Behavior of Monocrystalline Silicon Solar Cells: A Numerical and Experimental Investigation on the Module Encapsulation Materials 单晶硅太阳能电池的热行为：模块封装材料的数值和实验研究

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.37852.3101

A. Pavlović, C. Fragassa, M. Bertoldi, V. Mikhnych

{"title":"Thermal Behavior of Monocrystalline Silicon Solar Cells: A Numerical and Experimental Investigation on the Module Encapsulation Materials","authors":"A. Pavlović, C. Fragassa, M. Bertoldi, V. Mikhnych","doi":"10.22055/JACM.2021.37852.3101","DOIUrl":"https://doi.org/10.22055/JACM.2021.37852.3101","url":null,"abstract":"This research outlines the numerical predictions of the heat distribution in solar cells, accompanied by their empirical validation. Finite element thermal models of five laminated silicon solar photovoltaic cells were firstly established using a simulation software (ANSYS®). The flexible laminated solar cells under study are made of a highly transparent frontsheet, a silicon cell between two encapsulants, and a backsheet. Different combinations of layers (i.e., materials and thicknesses) were taken into account in order to analyze their effect on thermal behavior. Thermal properties of materials were derived in accordance with the literature. Similarly, boundary conditions, loads, and heat losses by reflection and convection were also specified. The solar cells were tested using solar lamps under standard conditions (irradiance: 1000W/m2; room-temperature: 25°C) with real-time temperatures measured by a thermal imager. This analysis offers an interpretation of how temperature evolves through the solar cell and, consequently, how the design choice can influence the cells’ efficiency.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":"7 1","pages":"1847-1855"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42694906","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: 5

A New Quantum-computing-based Algorithm for Robotic Arms and Rigid Bodies’ Orientation 基于量子计算的机械臂和刚体定向新算法

Applied and Computational Mechanics Pub Date : 2021-07-01 DOI: 10.22055/JACM.2021.37611.3048

N. Zioui, Yousra Mahmoudi, Aicha Mahmoudi, M. Tadjine, S. Bentouba

引用次数: 8

Behavior of high-density polyethylene at high strain rates 高密度聚乙烯在高应变速率下的行为

Applied and Computational Mechanics Pub Date : 2021-06-30 DOI: 10.24132/acm.2021.680

J. Trnka, E. Nezbedová, J. Kober, J. Buchar

引用次数: 0

An Experimental and Numerical Study on the Aerodynamic Performance of Vibrating Wind Turbine Blade with Frequency-Domain Method 振动风机叶片气动特性的频域实验与数值研究

Applied and Computational Mechanics Pub Date : 2021-06-04 DOI: 10.22055/JACM.2021.37406.3011

S. W. Naung, Mahdi Toosi, M. Rahmati

{"title":"An Experimental and Numerical Study on the Aerodynamic Performance of Vibrating Wind Turbine Blade with Frequency-Domain Method","authors":"S. W. Naung, Mahdi Toosi, M. Rahmati","doi":"10.22055/JACM.2021.37406.3011","DOIUrl":"https://doi.org/10.22055/JACM.2021.37406.3011","url":null,"abstract":"A highly efficient nonlinear frequency-domain solution method is proposed and employed to investigate the aerodynamic and aeromechanical performances of an oscillating wind turbine blade aerofoil in this study. Extensive validations of a frequencydomain method against an experiment as well as a typical time-domain solution method are provided in this paper. An experiment is also designed and conducted to measure pressure distributions over an aerofoil as well as to validate the numerical model. Unsteady pressure distributions and aeroelasticity parameters of the oscillating NACA0012 aerofoil are computed at various angles of attack and Reynolds numbers. Results indicate that the difference of unsteady pressure distributions between the two surfaces of the aerofoil becomes larger as the angle of attack is increased, whereas the flow separation on the suction surface is reduced by raising the Reynolds number. The turbulent flow develops in the downstream region due to the laminar vortex shedding at lower Reynolds numbers. It is also revealed that the Reynolds number has an impact on the aeroelasticity, and the aerodynamic damping value is larger at higher Reynolds numbers. The comparison between the frequency-domain method and the time-domain method shows that the frequency-domain method is not only accurate but also computationally very efficient as the computation time is reduced by 90%.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":"1 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45320174","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: 6

Determination of hydraulic characteristics of flow over a triangular sectioned weir by using experimental and numerical modeling. 用实验和数值模拟方法确定三角形断面堰流的水力特性。

Applied and Computational Mechanics Pub Date : 2021-06-01 DOI: 10.22059/JCAMECH.2021.318239.594

A. Yıldız, A. İ. Marti, M. Gogus

{"title":"Determination of hydraulic characteristics of flow over a triangular sectioned weir by using experimental and numerical modeling.","authors":"A. Yıldız, A. İ. Marti, M. Gogus","doi":"10.22059/JCAMECH.2021.318239.594","DOIUrl":"https://doi.org/10.22059/JCAMECH.2021.318239.594","url":null,"abstract":"The spillways of hydraulic structures transfer excessive water from dam reservoir to the downstream in a safe and controlled manner. A labyrinth or triangular weir is a flat spillway folded in plain view. The labyrinth weirs provide an increase in crest length for a given channel width and increase the flow capacity for a given weir load. As a result of the increased flow capacity, the labyrinth and triangular weirs require less space in the dam body than the flat weirs. In this study, experiments were carried out on the labyrinth weirs containing triangles of different heights and numbers by using 3 different weir heights (P=20cm, 30cm, and 40 cm) and 4 different weir shapes. Each experiment was repeated for 30 different discharge values. The effects of weir height and weir shape on the total head over the weir (HT) and discharge (Q) were investigated. In addition, the numerical models of all experimental setups were created by ANSYS-Fluent program using Computational Fluid Dynamics (CFD). By comparing the results obtained from the numerical models with the physical models, the accuracy of the numerical models was tested. According to the results, as the number of the triangles (N) of the weir increases, the discharge coefficient (Cd) decreases. The weir height (P) does not have a major effect on the discharge.","PeriodicalId":37801,"journal":{"name":"Applied and Computational Mechanics","volume":"52 1","pages":"215-232"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41590256","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