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Research on the key technology of level pre-assembly of steel tower segments

Zhang Yongli,Gu Bifeng

Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 48-52

Abstract:

In this paper, we researched the key technology of the level pre-assemblyLevel pre-assembly of steel tower fills the technology gaps in China and provides a strong basis for

Keywords： steel tower level pre-assembly support control apply level force

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Modeling limit force capacities of high force to volume lead extrusion dampers

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 609-622 doi: 10.1007/s11709-021-0724-x

Abstract: Small volumetric sizes and high force capacities define high-force-to-volume (HF2V) devices, which canHowever, the design of such devices for specific force capacities has proven difficult based on the complexitiesThis study developed upper- and lower-bound force capacity estimates from analytical mechanics basedThe proposed models were validated by comparing the predicted bounds to experimental force capacity data/sub>) pair has a mean lower-bound gap of 36%, meaning the lower bound was 74% of the actual device force

Keywords： extrusion lead dampers upper and lower bound analytical modelling limit force

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Quality control based on electrode displacement and force in resistance spot welding

Chuntao JI, Lipeng DENG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4, Pages 412-417 doi: 10.1007/s11465-010-0114-x

Abstract: The behaviors of electrode displacement and force during spot welding under various conditions, suchAn electrode force peak is observed and believed relevant to the sufficient nugget size.

Keywords： aluminum electrode displacement electrode force nugget size data acquisition

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Visualization of force networks in 2D dense granular materials

Jianguo LIU, Qicheng SUN, Feng JIN,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 109-115 doi: 10.1007/s11709-010-0003-8

Abstract: To understand the structure and evolution of force chains, a photoelastic technique was improved forThe interparticle contact force distribution was found a peak around the mean value, a roughly exponentialtail for greater force and a dip toward zero for smaller force.The force chain network around the probe tip was depicted, and the contact angle distribution of particlesin force chains was found to be well aligned in the directions of major principal stress.

Keywords： granular matter force chain multiscale modeling

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Motion/force transmission indices of parallel manipulators

Xinjun LIU, Chao WU, Fugui XIE

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 1, Pages 89-91 doi: 10.1007/s11465-011-0215-1

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Applications of atomic force microscopy in immunology

Jiping Li, Yuying Liu, Yidong Yuan, Bo Huang

Frontiers of Medicine 2021, Volume 15, Issue 1, Pages 43-52 doi: 10.1007/s11684-020-0769-6

Abstract: The principle of atomic force microscopy (AFM) and its three running modes are introduced for the mechanicalThe peak force tapping mode provides the most delicate and desirable virtues to collect high-resolutionimages of morphology and force curves.

Keywords： cellular mechanics atomic force microscopy neutrophil extracellular trap macrophage phagocytosis pore

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Non-convex sparse optimization-based impact force identification with limited vibration measurements

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0762-2

Abstract: Impact force identification is important for structure health monitoring especially in applications involvingDifferent from the traditional direct measurement method, the impact force identification technique isAs a typical inverse problem, impact force reconstruction and localization is a challenging task, whichMJX-TeXAtom-ORD">-ADMM is applied to solve the impact forceidentification problem with unknown force locations, which can realize simultaneous impact localization

Keywords： impact force identification inverse problem sparse regularization under-determined condition alternating

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Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2, Pages 114-120 doi: 10.1007/s11709-014-0267-5

Abstract: critical examination of existing random field models of heterogeneous two-phase media with emphasis on level-cutThe case of random level sets, often used to represent the geometry of physical systems, is also examined

Keywords： microstructure random fields level sets shape recovery two-phase media

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Shape and topology optimization for tailoring the ratio between two flexural eigenfrequencies of atomic force

Qi XIA,Tao ZHOU,Michael Yu WANG,Tielin SHI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1, Pages 50-57 doi: 10.1007/s11465-014-0286-x

Abstract:

In an operation mode of atomic force microscopy that uses a higher eigenmode to determine the physicalThe optimization problem is solved via the level set based method.

Keywords： atomic force microscopy cantilever probe eigenfrequency optimization

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The effect of sea level rise on beach morphology of caspian sea coast

M. A. Lashteh NESHAEI, F. GHANBARPOUR

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 369-379 doi: 10.1007/s11709-017-0398-6

Abstract: Bed level elevations are measured and compared with the theoretical equilibrium profile.In the next stage, following extensive investigations, the bed level changes due to arise in sea levelThe mechanism of beach re-treatment due to a rise in sea level is considered based on the simplifiedComparison of the equilibrium profiles for different cases of sea level rise, clearly shows that becauseof the sediment transport induced by the fluctuation of the water level, the beach profile in the surf

Keywords： wave coastal zone beach morphology evolution equilibrium profile sea level rise

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on PVDF ultrafiltration membrane fouling behavior under different pH conditions: interface adhesion force

Xudong WANG,Miao ZHOU,Xiaorong MENG,Lei WANG,Danxi HUANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0855-9

Abstract: Dramatic flux decline is caused by membrane–BSA adhesion force at start of filtration.different hydrophilic PVDF ultrafiltration (UF) membranes over a range of pH values, self-made atomic forcemembrane–BSA adhesion interaction was stronger than the BSA–BSA adhesion interaction, and the adhesion forceAt the same pH condition, the PVDF/PVA membrane–BSA adhesion force was smaller than that of PVDF/PVP

Keywords： PVDF membrane Membrane fouling Adhesion force Protein Interfacial free energy

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Level set band method: A combination of density-based and level set methods for the topology optimization

Peng WEI, Wenwen WANG, Yang YANG, Michael Yu WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3, Pages 390-405 doi: 10.1007/s11465-020-0588-0

Abstract: The level set method (LSM), which is transplanted from the computer graphics field, has been successfullyIn this study, a level set band method is proposed to overcome this drawback in handling topology changesin the level set framework.improve the continuity of objective and constraint functions by incorporating one parameter, namely, levelThe proposed method demonstrates a flexible topology change by applying a certain size of the level set

Keywords： level set method topology optimization density-based method level set band

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Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0726-y

Abstract: The increasing sealing force improves the sealing performance and increases the system’s energy consumptionA hybrid analytical–numerical–experimental (ANE) model is proposed to obtain the minimum sealing forceThe effects of roundness error, environmental pressure, and materials on the minimum sealing force areFinally, the minimum sealing force equation is applied in a balance valve to be experimented using aThe balance valve designed through the minimum sealing force equation is leak-free in the experiment.

Keywords： seawater balance valve sealing performance hybrid ANE model FEM minimum sealing force equation

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Two-level uncapacitated lot-sizing problem considering the financing cost of working capital requirement

Yuan BIAN, David LEMOINE, Thomas G. YEUNG, Nathalie BOSTEL

Frontiers of Engineering Management 2020, Volume 7, Issue 2, Pages 248-258 doi: 10.1007/s42524-019-0069-5

Abstract: However, in literatures related to lot-sizing problem, WCR has only been studied in the single-levelIn this paper, we initially adopt WCR model for a multi-level case.A two-level (supplier–customer) model is established on the basis of the classic multi-level lot-sizingTo tackle this problem, we propose sequential and centralized approaches to solve the two-level case

Keywords： two-level ULS problem lot-sizing working capital requirement ZIO property infinite production capacity

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bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow force

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0747-1

Abstract: Capacitive sensors are efficient tools for biophysical force measurement, which is essential for theindicating its great performance improvements over existing devices and feasibility in ultralow biomedical force

Keywords： capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force