Meccanica最新文献_第9页

Coupled fluid-structure simulation of a flapping wing using free multibody dynamics software 使用自由多体动力学软件对拍翼进行流固耦合模拟

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-04-29 DOI: 10.1007/s11012-024-01798-y

Claudio Caccia, Joel Guerrero, Pierangelo Masarati

{"title":"Coupled fluid-structure simulation of a flapping wing using free multibody dynamics software","authors":"Claudio Caccia, Joel Guerrero, Pierangelo Masarati","doi":"10.1007/s11012-024-01798-y","DOIUrl":"https://doi.org/10.1007/s11012-024-01798-y","url":null,"abstract":"<p>Computer simulations offer invaluable insights into fluid-structure interaction phenomena, increasing our understanding of complex behaviors within fluid flows and enabling predictions of consequential effects. This paper explores flapping wing simulation using an original toolchain based on free software. The structural domain is modeled using multibody dynamics, interfaced with arbitrary fluid dynamics solvers through a general-purpose multiphysics coupling library. The proposed toolchain is validated against benchmark models, demonstrating its effectiveness in various applications. Our study, inspired by experimental ones, applies this coupling to investigate the hydroelastic behavior of a flexible wing. Wing motion characteristics, structural properties, and convergence criteria are analyzed through numerical simulations. While achieving appreciable agreement with experimental data on wing motion ratios, challenges in dealing with large displacements have been identified. Nonetheless, the present study provides valuable insights into fluid-structure interactions, laying the groundwork for future refinements in computational modeling techniques and advancing the understanding of bio-inspired flight mechanisms.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"3 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140831921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Power flow and efficiency analysis of 2K-V gear transmission via virtual power 通过虚拟功率分析 2K-V 齿轮传动的功率流和效率

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-25 DOI: 10.1007/s11012-023-01743-5

Feihong Zhu, Chaosheng Song, Luca Bonaiti, Carlo Gorla

{"title":"Power flow and efficiency analysis of 2K-V gear transmission via virtual power","authors":"Feihong Zhu, Chaosheng Song, Luca Bonaiti, Carlo Gorla","doi":"10.1007/s11012-023-01743-5","DOIUrl":"10.1007/s11012-023-01743-5","url":null,"abstract":"<div><p>An analytical efficiency expression for the 2K-V gearbox, which includes both rotational and revolutional power, is derived using virtual power analysis. The presence of a constant-speed ratio mechanism in the 2K-V gearbox results in certain components rotating revolution without self-rotation. New concept, the revolutional power, is introduced to address this aspect. The efficiency formula and power flow have been verified through several data sets and velocity iconography. Further analysis investigates the impact of specific design parameters on efficiency and power losses. Moreover, sensitivity weights for design parameters affecting total efficiency are identified using machine learning and an optimal parameter range for their optimization is established. Design recommendations aimed at enhancing efficiency are provided. The results show that the losses at the meshes are significantly lower when the ratio of the first stage gearing is set to speed-up rather than speed-down. The smaller the difference in the number of teeth in the second stage gearing, the greater the power losses at the meshes. In the majority of speed ratio scenarios, the second-stage gear pair will experience significant meshing losses as virtual power flows through it. The design parameters related to the second-stage gearing have a significant effect on the overall system efficiency.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 5","pages":"811 - 832"},"PeriodicalIF":1.9,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140658650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lumped parameters models for the stability analysis of rotors supported on gas bearings 用于气体轴承支撑转子稳定性分析的集合参数模型

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-25 DOI: 10.1007/s11012-024-01789-z

F. Colombo, L. Lentini, T. Raparelli, A. Trivella

引用次数: 0

Effects of a nonlocal microstructure on peeling of thin films 非局部微结构对薄膜剥离的影响

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-24 DOI: 10.1007/s11012-024-01786-2

Riccardo Cavuoto, Luca Deseri, Massimiliano Fraldi

{"title":"Effects of a nonlocal microstructure on peeling of thin films","authors":"Riccardo Cavuoto, Luca Deseri, Massimiliano Fraldi","doi":"10.1007/s11012-024-01786-2","DOIUrl":"10.1007/s11012-024-01786-2","url":null,"abstract":"<div><p>In this work, starting from an approach previously proposed by the Authors, we put forward an extension to the large deformation regime of the dimensionally-reduced formulation for peridynamic thin plates, including both hyperelasticity and fracture. In particular, the model, validated against numerical simulations, addresses the problem of the peeling in nonlocal thin films, which when attached to a soft substrate highlights how nonlocality of the peeled-off layer might greatly influence the whole structural response and induce some unforeseen mechanical behaviours that could be useful for engineering applications. Through a key benchmark example, we in fact demonstrate that de-localization of damage and less destructive failure modes take place, these effects suggesting the possibility of <i>ad hoc</i> conceiving specific networks of nonlocal interactions between material particles, corresponding to lattice-equivalent structure of the nonlocal model treated, of interest in designing new material systems and interfaces with enhanced toughness and adhesive properties.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 8","pages":"1269 - 1283"},"PeriodicalIF":1.9,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11012-024-01786-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The interplay between membrane viscosity and ligand-binding receptor kinetics in lipid bilayers 脂质双层膜中膜粘度与配体结合受体动力学之间的相互作用

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-22 DOI: 10.1007/s11012-024-01779-1

Chiara Bernard, Angelo Rosario Carotenuto, Nicola Maria Pugno, Luca Deseri, Massimiliano Fraldi

{"title":"The interplay between membrane viscosity and ligand-binding receptor kinetics in lipid bilayers","authors":"Chiara Bernard, Angelo Rosario Carotenuto, Nicola Maria Pugno, Luca Deseri, Massimiliano Fraldi","doi":"10.1007/s11012-024-01779-1","DOIUrl":"10.1007/s11012-024-01779-1","url":null,"abstract":"<div><p>Plasma membranes appear as deformable systems wherein molecules are free to move and diffuse giving rise to condensed microdomains (composed of ordered lipids, transmembrane proteins and cholesterol) surrounded by disordered lipid molecules. Such denser and thicker regions, namely lipid rafts, are important communication hubs for cells. Indeed, recent experiments revealed how the most of active signaling proteins co-localize on such domains, thereby intensifying the biochemical trafficking of substances. From a material standpoint, it is reasonable to assume the bilayer as a visco-elastic body accounting for both in-plane fluidity and elasticity. Consequently, lipid rafts contribute to membrane heterogeneity by typically exhibiting higher stiffness and viscosity and by locally altering the bilayer dynamics and proteins activity. A chemo-mechanical model of lipid bilayer coupled with interspecific dynamics among the resident species (typically transmembrane receptors and trasporters) has been recently formulated to explain and predict how proteins regulate the dynamic heterogeneity of membrane. However, the explicit inclusion of the membrane viscosity in the model was not considered. To this aim, the present work enriches the constitutive description of the bilayer by modeling its visco-elastic behavior. This is done through a strain-level dependent viscosity able to theoretically trace back the alteration of membrane fluidity experimentally observed in lipid phase transitions. This provides new insights into how the quasi-solid and fluid components of lipid membrane response interact with the evolution of resident proteins by affecting the activity of raft domains, with effects on cell mechano-signaling.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 8","pages":"1231 - 1253"},"PeriodicalIF":1.9,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11012-024-01779-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140634936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combining machine learning with computational fluid dynamics using OpenFOAM and SmartSim 利用 OpenFOAM 和 SmartSim 将机器学习与计算流体动力学相结合

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-04-20 DOI: 10.1007/s11012-024-01797-z

Tomislav Maric, Mohammed Elwardi Fadeli, Alessandro Rigazzi, Andrew Shao, Andre Weiner

引用次数: 0

Energy of acceleration of a perfect unbounded fluid surrounding an arbitrary moving rigid body 围绕任意运动刚体的完美无界流体的加速度能量

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-20 DOI: 10.1007/s11012-024-01794-2

Thiago S. Hallak, Serge Sutulo, C. Guedes Soares

{"title":"Energy of acceleration of a perfect unbounded fluid surrounding an arbitrary moving rigid body","authors":"Thiago S. Hallak, Serge Sutulo, C. Guedes Soares","doi":"10.1007/s11012-024-01794-2","DOIUrl":"10.1007/s11012-024-01794-2","url":null,"abstract":"<div><p>This paper introduces the Gibbs–Appell formalism into fluids. It devises the energy of acceleration of a perfect fluid surrounding a moving impermeable rigid body and the hydrodynamic forces acting on the body. The fluid is considered infinite, and the rigid body may have any closed tridimensional form. Therefore, the velocity field is non-divergent and irrotational; the density field is homogeneous in space and non-dependent on time, and all viscous effects are neglected. Under these assumptions, an explicit formulation for the hydrodynamic forces acting on the body is known as a-priori, and it is recovered in this text following an approach based on generalized quasi-velocities and the Gibss–Appell formalism, that may handle a vaster class of mechanical problems in comparison to Newtonian mechanics, especially non-holonomic constrained systems. The devised formulation is applied to the two-dimensional case study of a disc in unsteady rectilinear motion: the analytical form for the generalized hydrodynamic forces acting on the disc is evaluated, as well as the explicit formulae for the hydrodynamic coefficients of the body and the total energy of acceleration of the surrounding fluid.</p></div>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"59 6","pages":"849 - 858"},"PeriodicalIF":1.9,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140625309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linear variations in conductivity and viscosity as particles’ basic profile for convective instability in nanofluids under various boundary conditions 在各种边界条件下，纳米流体对流不稳定性中作为颗粒基本轮廓的电导率和粘度的线性变化

IF 1.9 3区工程技术

Meccanica Pub Date : 2024-04-18 DOI: 10.1007/s11012-024-01784-4

Jyoti Sharma

引用次数: 0

Acceleration waves in thermoelastic complex media with temperature-dependent phase fields 热弹性复合介质中的加速波与温度相关相场

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-04-15 DOI: 10.1007/s11012-024-01792-4

Pasquale Giovine, Paolo Maria Mariano, Federica Mugnaioni

引用次数: 0

Correlation and modal analysis techniques for the study of the VIV response of a twin-box deck based on 3D LES simulations 基于三维 LES 模拟研究双箱甲板 VIV 响应的相关性和模态分析技术

IF 2.7 3区工程技术

Meccanica Pub Date : 2024-04-13 DOI: 10.1007/s11012-024-01774-6

Antonio J. Álvarez, Félix Nieto

{"title":"Correlation and modal analysis techniques for the study of the VIV response of a twin-box deck based on 3D LES simulations","authors":"Antonio J. Álvarez, Félix Nieto","doi":"10.1007/s11012-024-01774-6","DOIUrl":"https://doi.org/10.1007/s11012-024-01774-6","url":null,"abstract":"<p>Twin-box decks are prone to vortex-induced vibration (VIV) at moderate wind speeds, and previous studies have shown a complex interplay between the flow and the two parallel box girders. OpenFOAM is used to model the aerodynamic and aeroelastic responses of the twin-box deck of the Stonecutters Bridge by means of 3D LES simulations. Two cases are thoroughly analysed under smooth incoming flow: (i) static deck and ii) heave peak amplitude response at VIV excitation. The computational data provided by the CFD simulations have been exploited aiming at better understanding the complex aerodynamic and aeroelastic phenomena taking place. First, spanwise correlation analyses are applied to understand the level of organisation of the forcing flow actions, and identify the regions of the deck affected by different flow structures. Second, three different mode decomposition techniques (POD, SPOD and DMD) are applied to the time-dependent pressure distributions, revealing the pivotal role played by the leeward box in the twin-box deck response under wind action. The modal analyses are of utmost interest in the development of Reduced Order Models (ROM) for the VIV response of twin-box long-span bridges.</p>","PeriodicalId":695,"journal":{"name":"Meccanica","volume":"49 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140575675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0