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Dynamic modeling and coupling characteristics of rotating inclined beams with twisted-shape sections

Jin ZENG, Chenguang ZHAO, Hui MA, Bangchun WEN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 374-389 doi: 10.1007/s11465-019-0580-8

Abstract: beam; however, few considered the effect of the elastic-support boundary and the quantification of modalangles on the degree of coupling among flapwise, chordwise, and torsional directions were quantified via modalstrain energy ratios.

Keywords： elastic-support boundary     pre-twisted beam     semi-analytic method     modal strain energy ratio     torsional vibration    

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A new modeling approach for stress–strain relationship taking into account strain hardening and storedenergy by compacted graphite iron evolution

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11465-023-0761-3

Abstract: diesel engine material with excellent physical and mechanical properties, which meet the requirements of energythe strain hardening effect and stored energy caused by the microstructure evolution of CGI.accumulation of stored energy, which show similar variation trends to those of GNDs density.The parameters in the stress–strain relationship model are solved according to the stored energy underresults shows that the evolution of stored energy can accurately predict the stress–strain relationship

Keywords： stress−strain relationship     microstructure evolution     stored energy     strain hardening     graphite morphology    

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network for damage detection in functionally graded carbon nanotube-reinforced composite plates using modalkinetic energy

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1453-1479 doi: 10.1007/s11709-021-0767-z

Abstract: The elemental modal kinetic energy (MKE) values, calculated from natural frequencies and translational

Keywords： deep feed-forward neural networks     functionally graded carbon nanotube-reinforced composite plates     modalkinetic energy    

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An efficient two-stage approach for structural damage detection using meta-heuristic algorithms and group method of data handling surrogate model

Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 907-929 doi: 10.1007/s11709-020-0628-1

Abstract: In the first stage, in order to locate the damage accurately, the performance of the modal strain energyIn the second stage, to estimate the damage extent, the sensitivity of most used modal properties dueto damage, such as natural frequency and flexibility matrix is compared with the mean normalized modalstrain energy (MNMSE) of suspected damaged elements.Moreover, a modal property change vector is evaluated using the group method of data handling (GMDH)

Keywords： two-stage method     modal strain energy     surrogate model     GMDH     optimization damage detection    

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Multiple damage detection in complex bridges based on strain energy extracted from single point measurement

Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 722-730 doi: 10.1007/s11709-020-0624-5

Abstract: Strain Energy of the structure can be changed with the damage at the damage location.The use of modal-based methods to identify damage in complex bridges is always associated with problemseffects of higher modes and the adverse effect of operational conditions on the extraction of structural modalThen two damage detection indicators were developed based on strain energy variations.Indicators of the strain energy extracted from displacement influence line and the strain energy extracted

Keywords： damage detection     strain energy     influence line     complex bridges     rotation displacement    

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Stress–strain relationship for reactive powder concrete with recycled powder under uniaxial compression

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 7,   Pages 1015-1027 doi: 10.1007/s11709-024-1063-5

Abstract: fume, and steel fiber proportion on compressive strength, elastic modulus, and relative absorption energyanalyzed, and theoretical models for compressive strength, elastic modulus, and relative absorption energyA constitutive model for the uniaxial compressive stress–strain relationship of reactive powder concrete

Keywords： recycled powder     reactive powder concrete     elastic modulus     relative absorbed energy     stress–strain relationship    

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Damage detection in beam-like structures using static shear energy redistribution

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1552-1564 doi: 10.1007/s11709-022-0903-4

Abstract: In this study, a static shear energy algorithm is presented for the damage assessment of beam-like structuresAccording to the energy release principle, the strain energy of a damaged element suddenly changes whenTherefore, the change in the static shear energy is employed to determine the damage locations in beam-likeThe static shear energy is derived from the spectral factorization of the elementary stiffness matrixThe advantage of using shear energy as opposed to total energy is that only a few deflection data points

Keywords： damage detection     beam structure     strain energy     static displacement variation     energy damage index    

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Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine

Pengxing YI,Peng HUANG,Tielin SHI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 388-402 doi: 10.1007/s11465-016-0404-z

Abstract: This paper examines the distinctive modal properties of WTGs through finite element (FE) and experimentalmodal analyses.First, a whole system model is developed to investigate the first 10 modal frequencies and mode shapesSecond, the FE modal results are validated through experimental modal analyses of a 1.5 WM WTG usingThe natural frequencies from the FE and experimental modal analyses show favorable agreement and reveal

Keywords： wind turbine gearbox     modal analysis     finite element analysis     modal frequency     bearing equivalence    

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Experimental and computational validation of a scaled train tunnel model using modal analysis

Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 420-428 doi: 10.1007/s11465-013-0281-7

Abstract: The modal properties for the 300 Hz to 1500 Hz range, including resonances and mode shapes were identified

Keywords： reverberation time     acoustic environment     modal properties     resonances    

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Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration

Zhigen WU, Guohua LIU, Zihua ZHANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 112-120 doi: 10.1007/s11709-010-0069-3

Abstract: In addition, a new method was compared with the linear modal-based damage assessment using wavelet transformWith better sensibility of damage than modal parameters, probably DRAS is a promising damage indicator

Keywords： damage assessment     decay ratio of acceleration signals (DRAS)     wavelet transform (WT)     modal analysis     reinforced    

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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) isdeveloped VMD technique is utilized to decompose the free decay response (FDR) of a structure into to modalA novel procedure is developed to calculate the instantaneous modal frequencies and instantaneous modalThe proposed identification method can straightforwardly extract the mode shape vectors using the modalparameter variation, and amplitude-dependent modal parameters, etc.

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

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A model for creep life prediction of thin tube using strain energy density as a function of stress triaxiality

Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 181-186 doi: 10.1007/s11465-013-0257-7

Abstract: The model employs strain energy density and assumes that the uniaxial strain energy density of a componentcan be easily calculated and can be converted to multi-axial strain energy density by multiplying itelastic-creep and elastic-plastic-creep finite element analysis (FEA) is performed to get multi-axial strainenergy density of the component which is compared with the calculated strain energy density for both

Keywords： elastic-creep     elastic-plastic-creep     stress triaxiality     life prediction     pressure vessels     finite element analysis (FEA)    

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Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 281-285 doi: 10.1007/s11709-007-0036-9

Abstract: Structure modal parameter online identification was used to monitor the structural health as evidencednatural excitation technique and the eigensystem realization algorithm were combined to identify the modalThe experimental modal analysis was performed on a two-story steel braced frame model excited by simulated

Keywords： eigensystem realization     eigen-sensitivity analysis     realization algorithm     vibration     effective    

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Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 210-216 doi: 10.1007/s11709-012-0165-7

Abstract: If stresses or forces are needed, these are easily determined by the value of the strain and the relevant

Keywords： steel     stress-strain characteristics     tension test     strain design     actual behavior     improved design codes    

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Control mode selection for modal control of long-span arch bridge

Zhengying LI, Zhengliang LI,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 401-406 doi: 10.1007/s11709-009-0052-z

Abstract: seismic control of arch bridge, a model reduction of long-span arch bridge was implemented based on modalAs for the critical mode selection, an approach based on the maximum modal displacement was presentedseismic excitation and is more reasonable than only considering dynamic bridge characteristics based on a modalThe numerical results show that the method of maximal modal displacement better analyze long-span arch

Keywords： selection     reduced-order     excitation     long-span     simplified    

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Title Author Date Type Operation

Dynamic modeling and coupling characteristics of rotating inclined beams with twisted-shape sections

Jin ZENG, Chenguang ZHAO, Hui MA, Bangchun WEN

Journal Article

A new modeling approach for stress–strain relationship taking into account strain hardening and storedenergy by compacted graphite iron evolution

Journal Article

network for damage detection in functionally graded carbon nanotube-reinforced composite plates using modalkinetic energy

Journal Article

An efficient two-stage approach for structural damage detection using meta-heuristic algorithms and group method of data handling surrogate model

Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN

Journal Article

Multiple damage detection in complex bridges based on strain energy extracted from single point measurement

Alireza ARABHA NAJAFABADI, Farhad DANESHJOO, Hamid Reza AHMADI

Journal Article

Stress–strain relationship for reactive powder concrete with recycled powder under uniaxial compression

Journal Article

Damage detection in beam-like structures using static shear energy redistribution

Journal Article

Numerical analysis and experimental investigation of modal properties for the gearbox in wind turbine

Pengxing YI,Peng HUANG,Tielin SHI

Journal Article

Experimental and computational validation of a scaled train tunnel model using modal analysis

Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI

Journal Article

Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration

Zhigen WU, Guohua LIU, Zihua ZHANG

Journal Article

Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Journal Article

A model for creep life prediction of thin tube using strain energy density as a function of stress triaxiality

Tahir MAHMOOD, Sangarapillai KANAPATHIPILLAI, Mahiuddin CHOWDHURY

Journal Article

Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Journal Article

Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Journal Article

Control mode selection for modal control of long-span arch bridge

Zhengying LI, Zhengliang LI,

Journal Article