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Analyzing the nonlinear vibrational wave differential equation for the simplified model of Tower Cranes

M.R. AKBARI,D.D. GANJI,A.R. AHMADI,Sayyid H. Hashemi KACHAPI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1,   Pages 58-70 doi: 10.1007/s11465-014-0289-7

Abstract:

In the current paper, a simplified model of Tower Cranes has been presented in order to investigateand analyze the nonlinear differential equation governing on the presented system in three differentresults have been indicated that this approach is very efficient and easy so it can be applied for other nonlinearof study such as fluid mechanics, chemical engineering, etc. make AGM be a powerful and useful role modelfor researchers in order to solve complicated nonlinear differential equations.

Keywords： Algebraic Method (AGM)     tower crane     oscillating system     angular frequency    

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A Simplified Nonlinear Model of Vertical Vortex-Induced Force on Box Decks for Predicting Stable Amplitudes

Le-Dong Zhu, Xiao-Liang Meng, Lin-Qing Du, Ming-Chang Ding

Engineering 2017, Volume 3, Issue 6,   Pages 854-862 doi: 10.1016/j.eng.2017.06.001

Abstract:

Wind-tunnel tests of a large-scale sectional model with synchronous measurements of force and vibrationresponses were carried out to investigate the nonlinear behaviors of vertical vortex-induced forcesThe results show that the nonlinear components of the vertical VIF often differ from deck to deck; theOn these bases, a universal simplified nonlinear mathematical model of the vertical VIF on box decks

Keywords： Box deck of bridge     Vertical vortex-induced vibration     Vertical vortex-induced force     Simplified nonlinearmodel     Wind-tunnel test     Large-scale sectional model     Synchronous measurement of force and     vibration    

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A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 122-128 doi: 10.1007/s11708-012-0175-0

Abstract: A simplified model of the direct-contact heat transfer in this desalination system is proposed and theoretical

Keywords： liquefied natural gas (LNG)     cold energy utilization     desalination     direct-contact heat transfer    

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A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Frontiers of Structural and Civil Engineering   Pages 1021-1032 doi: 10.1007/s11709-023-0952-3

Abstract: In recent years, concrete and reinforced concrete piles have been widely used to stabilize soft ground under embankments. Previous research has shown that bending failure, particularly during rapid filling on soft ground, is the critical failure mode for pile-supported embankments. Here, we propose an efficient two-stage method that combines a test-verified soil deformation mechanism and Poulos’ solution for pile–soil interaction to investigate the bending behavior of piles supporting embankments on soft ground. The results reveal that there are three possible bending failure scenarios for such piles: at the interface between the soft and firm ground layers, at mid-depths of the fan zone, and at the boundary of the soil deformation mechanism. The location of the bending failure depends on the position and relative stiffness of the given pile. Furthermore, the effect of embedding a pile into a firm ground layer on the bending behavior was investigated. When the embedded length of a pile exceeded a critical value, the bending moment at the interface between the soft and firm ground layers reached a limiting value. In addition, floating piles that are not embedded exhibit an overturning pattern of movement in the soft ground layer, and a potential failure is located in the upper part of these piles.

Keywords： bending behavior     pile     embankment     soil−structure interaction     failure mode    

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Iterative finite element model of nonlinear viscoplastic analyses for blended granular porous media

WU Yuching, ZHU Cimian

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 464-473 doi: 10.1007/s11709-007-0063-6

Abstract: The iterative finite element model, in which an element is used to represent a single particle, is generatedto analyze the global behavior of multiple-material aggregates of materially nonlinear viscoplastic

Keywords： nonlinear viscoplastic     iterative     behavior     multiple-material    

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Evaluation of a developed bypass viscous damper performance

Mahrad FAHIMINIA, Aydin SHISHEGARAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 773-791 doi: 10.1007/s11709-020-0627-2

Abstract: According to experimental results, Computational Fluid Dynamic (CFD) model, a numerical formula and thesimplified Maxwell model are found and assessed; therefore, the verification of numerical and computationalAlso, a simplified procedure is proposed to design structures with bypass viscous dampers.Nonlinear time history analyses revealed that the hospital with viscous damper experiences less structural

Keywords： developed viscous damper     external orifice     energy dissipation     seismic behavior     CFD model of viscous damper     a simplified model    

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Development of a simplified n-heptane/methane model for high-pressure direct-injection natural

Jingrui LI, Haifeng LIU, Xinlei LIU, Ying YE, Hu WANG, Xinyan WANG, Hua ZHAO, Mingfa YAO

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 405-420 doi: 10.1007/s11708-021-0718-3

Abstract: In the present paper, a reduced -heptane/methane model consisting of 35-step reactions was constructedThen this model was further reduced to include only 27 reactions by utilizing the HyChem (Hybrid Chemistryachieved and reasonable predictions for the measured laminar flame speeds were obtained for the 35-step modelBut the 27-step model cannot predict the laminar flame speed very well., the predicted distributions of OH and CH O are significantly different from those of the 334-step model

Keywords： high-pressure direct-injection     natural gas     chemical kinetics     combustion modelling     marine engine    

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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 viaAfter discussing the method to establish the hybrid model and introducing the hybrid model identification, a set of relative formulas are derived for calculating the hybrid model and computing the Volterraseries solution of nonlinear dynamic circuits and systems.Results 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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Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 605-617 doi: 10.1007/s11709-018-0499-x

Abstract: It is shown that, in cases of low wind speeds, the IF-denoted model reflects correctly the mean windload properties, and results in correct mean structural responses; in contrast, the RF-denoted modelAt very high wind speeds, however, even the IF-denoted model can lead to significant deviation from theincompatibility at high wind speeds, a methodology of subtraction of pseudo-steady effects from the aeroelastic model

Keywords： bridge     aerodynamics     nonlinear     aeroelastic model     Pseudo-steady     mean wind loads    

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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 modelsThe model simulation and experiments show that the GNAR model can accurately approximate to the dynamiccharacteristics of the most nonlinear models applied in academics and engineering.The proposed GNAR model is flexible and effective.

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

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Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO,Yoko OKAZAKI

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 93-102 doi: 10.1007/s11709-015-0311-0

Abstract: Wind-tunnel study on the improvement of aerodynamic stability of simplified suspension-bridge girderstructures was conducted with using a 1/40-scaled section model.

Keywords： suspension bridge     aerodynamics     simplified girder     wind-tunnel test    

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Vibration suppression of speed-controlled robots with nonlinear control

Paolo BOSCARIOL,Alessandro GASPARETTO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 204-212 doi: 10.1007/s11465-016-0380-3

Abstract:

In this paper, a simple nonlinear control strategy for the simultaneous position tracking and vibration

Keywords： industrial robot     nonlinear control     vibration damping     model-free control     motion control    

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Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0689-z

Abstract: inferring the input fault parameters for the observed output or solving the inverse problem of the physical modelThe presented work develops a surrogate-model-assisted method for solving the nonlinear inverse problemin limited physical model evaluations.routine that benefits from the rapidity of the surrogate models and the reliability of the physical modelcan effectively identify the parameters that induce the abnormal signal output with limited physical model

Keywords： surrogate model     gas face seal     fault diagnosis     nonlinear dynamics     tribology    

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Geometrical nonlinear deformation model and its experimental study on bimorph giant magnetostrictive

LIU Wei, JIA Zhenyuan, WANG Fuji, ZHANG Yongshun, GUO Dongming

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 313-317 doi: 10.1007/s11465-008-0048-8

Abstract: According to nonlinear elastic theory, a nonlinear deformation model of the bimorph GMF is establishedExperiments on TbDyFe/Polyimide (PI)/SmFe and TbDyFe/Cu/SmFe are then conducted to verify the proposed modelResults indicate that the nonlinear deflection curve model is in good conformity with the experimental

Keywords： magnetostrictive     nonlinear     magnetostriction     inaccurate     geometrical nonlinearity    

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machine-learning-based system identification of dynamical systems under control: application towards the modelpredictive control of a highly nonlinear reactor system

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 237-250 doi: 10.1007/s11705-021-2058-6

Abstract: Advanced model-based control strategies, e.g., model predictive control, can offer superior control ofThis work articulates an integrated system identification procedure for deriving black-box nonlinearcontinuous-time multiple-input multiple-output system models for nonlinear model predictive control.model predictive controller for a highly nonlinear continuous stirred tank reactor system.This demonstration of how such system models could be identified for nonlinear model predictive control

Keywords： nonlinear model predictive control     black-box modeling     continuous-time system identification     machine    

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Title Author Date Type Operation

Analyzing the nonlinear vibrational wave differential equation for the simplified model of Tower Cranes

M.R. AKBARI,D.D. GANJI,A.R. AHMADI,Sayyid H. Hashemi KACHAPI

Journal Article

A Simplified Nonlinear Model of Vertical Vortex-Induced Force on Box Decks for Predicting Stable Amplitudes

Le-Dong Zhu, Xiao-Liang Meng, Lin-Qing Du, Ming-Chang Ding

Journal Article

A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

Journal Article

A simplified method for investigating the bending behavior of piles supporting embankments on soft ground

Journal Article

Iterative finite element model of nonlinear viscoplastic analyses for blended granular porous media

WU Yuching, ZHU Cimian

Journal Article

Evaluation of a developed bypass viscous damper performance

Mahrad FAHIMINIA, Aydin SHISHEGARAN

Journal Article

Development of a simplified n-heptane/methane model for high-pressure direct-injection natural

Jingrui LI, Haifeng LIU, Xinlei LIU, Ying YE, Hu WANG, Xinyan WANG, Hua ZHAO, Mingfa YAO

Journal Article

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

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

Journal Article

Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Journal Article

General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Journal Article

Improvement of aerodynamic stability of suspension bridges with H-shaped simplified stiffening girder

Hiroshi KATSUCHI,Hitoshi YAMADA,Mayuko NISHIO,Yoko OKAZAKI

Journal Article

Vibration suppression of speed-controlled robots with nonlinear control

Paolo BOSCARIOL,Alessandro GASPARETTO

Journal Article

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Journal Article

Geometrical nonlinear deformation model and its experimental study on bimorph giant magnetostrictive

LIU Wei, JIA Zhenyuan, WANG Fuji, ZHANG Yongshun, GUO Dongming

Journal Article

machine-learning-based system identification of dynamical systems under control: application towards the modelpredictive control of a highly nonlinear reactor system

Journal Article