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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structuralanalysis.This study aims to increase the numerical stability, and to decrease the analysis time.To fulfil this objective, the reduction rate of analysis error for consecutive iterations is minimizedAfter combining this novel relationship with the other DRM factors, various geometrical nonlinear structures

Keywords： viscous dynamic relaxation time step displacement error geometric nonlinear analysis

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Probabilistic analysis of secant piles with random geometric imperfections

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 682-695 doi: 10.1007/s11709-021-0703-2

Abstract: safe and cost-effective secant-pile wall, a three-dimensional model of a secant pile, considering the geometricThe integrity of the secant-pile wall can be overestimated without considering the uncertainty of geometric

Keywords： secant piles ultrasonic cross-hole testing probabilistic analysis reliability-based design random

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Isogeometric analysis based on geometric reconstruction models

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4, Pages 782-797 doi: 10.1007/s11465-021-0648-0

Abstract: In isogeometric analysis (IGA), the boundary representation of computer-aided design (CAD) and the tensor-productnon-uniform rational B-spline structure make the analysis of three-dimensional (3D) problems with irregularIn this paper, an IGA method for complex models is presented by reconstructing analysis-suitable models

Keywords： isogeometric analysis reconstruction model level set function trimmed element point cloud

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Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 24-40 doi: 10.1007/s11709-010-0082-6

Abstract: The numerical investigation employs a fully nonlinear dynamic finite difference analysis incorporating

Keywords： earth dam numerical nonlinear response dynamic analysis earthquake dam height

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Robust nonlinear control via feedback linearization and Lyapunov theory for permanent magnet synchronous

Ridha CHEIKH, Arezki MENACER, L. CHRIFI-ALAOUI, Said DRID

Frontiers in Energy 2020, Volume 14, Issue 1, Pages 180-191 doi: 10.1007/s11708-018-0537-3

Abstract: In this paper, the method for the nonlinear control design of a permanent magnet synchronous generatorThe method is based on the differential geometric feedback linearization technique (DGT) and the Lyapunov

Keywords： permanent magnet synchronous generator wind energy conversion system stochastic differential geometric

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Deformable image registration with geometric changes

Yu LIU,Bo ZHU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10, Pages 829-837 doi: 10.1631/FITEE.1500045

Abstract: Geometric changes present a number of difficulties in deformable image registration.In this paper, we propose aglobal deformation framework to model geometric changes whilst promoting aachieve this, we have developed an innovative model which significantly reduces the side effects of geometricintroduction of a sparsity-inducing norm, which is typically L1 norm regularization targeting regions where geometric

Keywords： Geometric changes Image registration Sparsity Traumatic brain injury (TBI)

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Nonlinear dynamic analysis of functionally graded carbon nanotube-reinforced composite plates using MISQ20

Frontiers of Structural and Civil Engineering Pages 1072-1085 doi: 10.1007/s11709-023-0951-4

Abstract: integration smoothed quadrilateral element with 20 unknowns of displacement (MISQ20) to investigate the nonlinearFinally, the effects of the input parameters on the nonlinear vibration of the plates are investigated

Keywords： carbon nanotube MISQ20 FG-CNTRC plate nonlinear vibration nonlinear dynamic analysis SFEM

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The study of hybrid model identification, computation analysis and fault location for nonlinear dynamic

XIE Hong, HE Yi-gang, ZENG Guan-da

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2, Pages 233-237 doi: 10.1007/s11465-006-0003-5

Abstract: This paper presents the hybrid model identification for a class of nonlinear circuits and systems viaformulas are derived for calculating the hybrid model and computing the Volterra series solution of nonlinearResults show that the method has high accuracy and efficiency for fault location of nonlinear dynamic

Keywords： block-pulse function nonlinear multiple diagnosis combination

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General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 15-24 doi: 10.1007/s11465-009-0015-z

Abstract: However, some nonlinear factors are within the practical system; thus, it is difficult to fit the modelThis paper proposes a general expression for linear and nonlinear auto-regressive time series modelsexperiments show that the GNAR model can accurately approximate to the dynamic characteristics of the most nonlinear

Keywords： linear and nonlinear autoregressive model system identification time series analysis

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Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 253-274 doi: 10.1007/s11709-020-0639-y

Abstract: The analysis of cable structures is one of the most challenging problems for civil and mechanical engineersBecause they have highly nonlinear behavior, it is difficult to find solutions to these problems.achieve this goal, 16 numerical examples and two criteria, namely, the number of iterations and the analysis

Keywords： nonlinear analysis cable structure stiffness matrix dynamic relaxation method

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Analysis of nonlinear channel friction inverse problem

CHENG Weiping, LIU Guohua

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 205-210 doi: 10.1007/s11709-007-0024-0

Abstract: Based on the Backus-Gilbert inverse theory, the singular value decomposition (SVD) for general inverse matrices and the optimization algorithm are used to solve the channel friction inverse problem. The resolution and covariance friction inverse model in matrix form is developed to examine the reliability of solutions. Theoretical analyses demonstrate that the convergence rate of the general Newton optimization algorithm is in the second-order. The Wiggins method is also incorporated into the algorithm. Using the method, noise can be suppressed effectively, and the results are close to accurate solutions with proper control parameters. Also, the numerical stability can be improved.

Keywords： singular SVD second-order covariance Theoretical

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Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 188-205 doi: 10.1007/s11709-013-0199-5

Abstract: Large dams are complex structures with nonlinear dynamic behavior.continuous records of some geotechnical characteristic(s) of a dam and modern methods of time series linear/nonlinearanalysis the main dynamical features of the entire, unknown process (here—dam deformation) can be analyzedBesides, recently developed linear/nonlinear data analysis and prediction schemes may help to quantifyThe proposed real-time telemetric monitoring (DAMWATCH) complex and linear/nonlinear dynamical analysis

Keywords： real time monitoring telemetry dam tilts diagnostic tools hysteresis nonlinear dynamics

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Slope stability analysis based on a multigrid method using a nonlinear 3D finite element model

Yaoru LIU, Zhu HE, Bo LI, Qiang YANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1, Pages 24-31 doi: 10.1007/s11709-013-0190-1

Abstract: determine the stability safety factor for any slip surface or slide block through a combination of nonlinearfinite element analysis and limit equilibrium analysis.An ideal elastic–plastic incremental analysis method based on the Drucker–Prager yield criterion wasadopted in the nonlinear finite element computation.using the rigid-body limit equilibrium method and were in better agreement with actual values because nonlinear

Keywords： slope stability multi-grid method nonlinear finite element method

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Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 297-307 doi: 10.1007/s11709-012-0162-x

Abstract: The geometric nonlinearity, material nonlinearity, high temperature creep, and temperature rate of changeof the numerical model proposed in this paper is greatly beneficial to the steel industry for creep analysis

Keywords： creep plane steel frame fire finite element method geometric nonlinearity

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Nonlinear analysis of pre-tensioned glass wall facade by stability function with initial imperfection

Siu-Lai CHAN, Yaopeng LIU, Andy LEE,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 376-382 doi: 10.1007/s11709-010-0086-2

Abstract: of glass panes in this type of system occurs occasionally, likely to be due to error in design and analysisThis paper presents a rigorous analysis and design of this type of structural systems used in a projectfunction with initial curvature is used in place of the cubic function, which is only accurate for linear analysisThe considerations and analysis techniques are believed to be of value to engineers involved in the design

Keywords： tension system glass wall nonlinear analysis pre-tensioning second-order analysis