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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, whichof the true impact locations.force identification 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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Impact force detection using an energy flow estimator with piezoelectric sensors

Xingjun WANG, Daniel GUYOMAR, Kaori YUSE, Mickaël LALLART, Lionel PETIT,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2, Pages 194-203 doi: 10.1007/s11465-010-0004-2

Abstract: Currently, there are numerous methods for estimating impact locations.This paper proposes a simple, rapid, and low-powered impact estimation method based on energy flow direction

Keywords： impact detection energy flow piezoelectric sensor thin plate

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2, Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: On the other hand, solving the inverse problem of the input force estimation and its distribution toeach SDOFs, from the measured structural responses plays an important role in structural identification

Keywords： structural modal parameters damping identification method input excitation force identification Inverse

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Nonlinear restoring force identification based on measured time series

Xu Bin,He Jia

Strategic Study of CAE 2011, Volume 13, Issue 9, Pages 76-82

Abstract:

In this study, a general nonlinear restoring force (NRF) identification

Keywords： nonlinear restoring force identification MR damper least-squares techniques equivalent linear system

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Aerodynamic impact of train-induced wind on a moving motor-van

Jiajun HE; Huoyue XIANG; Yongle LI; Bin HAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7, Pages 909-927 doi: 10.1007/s11709-022-0833-1

Abstract: The newly-built single-level rail-cum-road bridge brings the issue of the aerodynamic impact of train-inducedSuch an aerodynamic impact mechanism was explored; a relationship between the transverse distance between

Keywords： rail-cum-road bridge aerodynamic impact train-induced wind CFD aerodynamic force quantitative analysis

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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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Vibration-based hypervelocity impact identification and localization Research Article

Jiao BAO, Lifu LIU, Jiuwen CAO,jwcao@hdu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 4, Pages 515-529 doi: 10.1631/FITEE.2000483

Abstract: Hypervelocity impact (HVI) vibration source identification and localization have found wide applicationssynchrosqueezed transform (SST) algorithm and the texture color distribution (TCD) based HVI source identificationand localization using impact images.The experimental results show that the proposed HVI identification and localization algorithm is more

Keywords： Ensemble learning Synchrosqueezied transform Gray-level co-occurrence matrix Image entropy Distance estimation

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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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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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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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Serviceability of Large-span Steel–Concrete Composite Beam with Precast Hollow Core Slabs Under Walking Impact Article

Jiepeng Liu, Shu Huang, Jiang Li, Y. Frank Chen

Engineering 2022, Volume 19, Issue 12, Pages 93-104 doi: 10.1016/j.eng.2021.04.025

Abstract: study, 150 load–time histories of walking, excited by 25 test participants, are obtained using a force

Keywords： Composite beam Hollow core slab Walking force Floor vibration Mode shape

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Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5, Pages 1082-1094 doi: 10.1007/s11709-019-0537-3

Abstract: An out-put only modal parameter identification method based on variational mode decomposition (VMD) isThe proposed identification method can straightforwardly extract the mode shape vectors using the modaldemonstrate the efficiency and highlight the superiority of the proposed method in modal parameter identificationThe proposed method is proved to be efficient and accurate in modal parameter identification for both

Keywords： modal parameter identification variational mode decomposition civil structure nonlinear system closely

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Game theoretic analysis of environmental impact assessment system in China

CHENG Hongguang, PU Xiao, GONG Li, QI Ye

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4, Pages 448-453 doi: 10.1007/s11783-007-0071-8

Abstract: Environmental impact assessment (EIA) system has been established in China since 1973.

Keywords： public impact assessment Environmental impact general

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Experimental and analytical investigation on friction resistance force between buried coated pressurized

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 4, Pages 615-629 doi: 10.1007/s11709-024-1017-y

Abstract: and external pipe surface of buried coated pressurized steel pipes relative to the internal thrust forceFriction resistance force values reported herein could be considered conservative.

Keywords： friction resistance force thrust force coated pressurized steel pipe soil type overburden depth