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Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 69-82 doi: 10.1007/s11709-014-0231-4

Abstract: Dynamic analysis was performed in time domain, using fully nonlinear model by PLAXIS.Finally the obtained response spectra from fully nonlinear method were compared with site response spectra

Keywords： fully nonlinear method     site effect     dynamic analysis     response spectra    

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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: The rigid-body limit equilibrium method cannot reflect the actual stress distribution in a rock mass,To address these problems, a multi-grid method was adopted in this study to establish a structural gridthrough a combination of nonlinear finite element analysis and limit equilibrium analysis.adopted in the nonlinear finite element computation.and were in better agreement with actual values because nonlinear stress adjustment was considered in

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

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An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 279-293 doi: 10.1007/s11465-019-0575-5

Abstract: oscillation condition is much less critical than the Crank–Nicolson scheme, and the accuracy is higher than a fully

Keywords： optimization     design-dependent boundary condition     transient heat conduction     implicit time integration     adjoint method    

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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: The presented work develops a surrogate-model-assisted method for solving the nonlinear inverse problemThe method prepares a small initial database on sites generated with a Latin hypercube design and thenThe method is validated on simulated and experimental cases.Results demonstrate that the method can effectively identify the parameters that induce the abnormal

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

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Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1520-1530 doi: 10.1007/s11709-020-0672-x

Abstract: this study, for the first time, we investigate the nonlocality superimposed to the size effects on the nonlinearWe use a reduced-order model based on the differential quadrature method (DQM) to discretize the governingnonlinear equation of motion and acquire a discretized-parameter nonlinear model of the system.The structural nonlinear behavior of the system assuming both strain and velocity gradient theories is

Keywords： velocity gradient elasticity theory     nanotube resonators     differential-quadrature method     nonlinear vibration    

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Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 435-441 doi: 10.1007/s11465-011-0243-x

Abstract:

Nonlinear functions are crucial points and terms in engineering problems.This paper presents a novel method called the max-min method for presenting an accurate approximate analyticalsolution to strong nonlinear oscillators.It can solve many linear or nonlinear differential equations without the tangible restriction of sensitivityto the degree of the nonlinear term.

Keywords： min-max method     nonlinear oscillation     duffing equation     mathematical pendulum     He’s energy balance method    

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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: Because they have highly nonlinear behavior, it is difficult to find solutions to these problems.The dynamic relaxation method (DRM) is an explicit procedure for analyzing these types of structures.

Keywords： nonlinear analysis     cable structure     stiffness matrix     dynamic relaxation method    

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Analytical method of capsizing probability in the time domain for ships in the random beam seas

LIU Liqin, TANG Yougang, LI Hongxia

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 361-366 doi: 10.1007/s11709-007-0048-5

Abstract: The nonlinear differential equation of the rolling motion of ships in random beam seas was establishedconsidering nonlinear damping, nonlinear restoring moment, and random waves.random rolling differential equation was solved in the time domain by applying the harmonic acceleration methodthe survival probabilities of ships in random seas can be predicted quantitatively by the proposed method

Keywords： different     survival probability     different significant     nonlinear differential     narrowband    

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Solving nonlinear differential equations of Vanderpol, Rayleigh and Duffing by AGM

M. R. AKBARI,D. D. GANJI,A. MAJIDIAN,A. R. AHMADI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 177-190 doi: 10.1007/s11465-014-0288-8

Abstract:

In the present paper, three complicated nonlinear differential equations in the field of vibrationare Vanderpol, Rayleigh and Duffing equations, have been analyzed and solved completely by Algebraic MethodThis issue will be emerged after comparing the achieved solutions by numerical method (Runge-Kutte 4thBased on the comparisons which have been made between the gained solutions by AGM and numerical methodbe applied for other complicated nonlinear problems.

Keywords： Algebraic Method (AGM)     Angular Frequency     Vanderpol     Rayleigh     Duffing    

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Endochronic damage constitutive model for fully-graded aggregate mass concrete

SONG Yupu, WANG Huailiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 274-280 doi: 10.1007/s11709-007-0035-x

Abstract: The behavior of deformation and strength of a fully-graded aggregate concrete under complex stress stateis the basis of the nonlinear analysis and design for mass concrete structures such as concrete damsThe proposed model is used to analyze the deformation and strength of fully-graded aggregate mass concrete

Keywords： concept     surface     design     concern     strength    

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A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 504-515 doi: 10.1007/s11708-022-0855-3

Abstract: Thermal energy storage has been a pivotal technology to fill the gap between energy demands and energy supplies. As a solid-solid phase change material, shape-memory alloys (SMAs) have the inherent advantages of leakage free, no encapsulation, negligible volume variation, as well as superior energy storage properties such as high thermal conductivity (compared with ice and paraffin) and volumetric energy density, making them excellent thermal energy storage materials. Considering these characteristics, the design of the shape-memory alloy based the cold thermal energy storage system for precooling car seat application is introduced in this paper based on the proposed shape-memory alloy-based cold thermal energy storage cycle. The simulation results show that the minimum temperature of the metal boss under the seat reaches 26.2 °C at 9.85 s, which is reduced by 9.8 °C, and the energy storage efficiency of the device is 66%. The influence of initial temperature, elastocaloric materials, and the shape-memory alloy geometry scheme on the performance of car seat cold thermal energy storage devices is also discussed. Since SMAs are both solid-state refrigerants and thermal energy storage materials, hopefully the proposed concept can promote the development of more promising shape-memory alloy-based cold and hot thermal energy storage devices.

Keywords： shape-memory alloy (SMA)     elastocaloric effect (eCE)     cooled seat     cold thermal energy storage    

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Multiobjective image recognition algorithm in the fully automatic die bonder

JIANG Kai, CHEN Hai-xia, YUAN Sen-miao

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 313-316 doi: 10.1007/s11465-006-0026-y

Abstract: is a very important task to automatically fix the number of die in the image recognition system of a fullyIn the evolutionary process of GA, a clustering method is provided that utilizes information from theThe whole population is grouped into different niches by the clustering method.

Keywords： clustering     different     recognition algorithm     Algorithm     multiobjective    

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Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 390-394 doi: 10.1007/s11705-007-0071-z

Abstract: A group bond contribution model using artificial neural networks, which had the high ability of nonlinearThe method can be used not only to reveal the quantitative correlation between flash points and molecular

Keywords： information     nonlinear     quantitative correlation     superior     molecular    

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Fully stochastic analysis method for structural time-independent reliability

Du Bin,Xiang Tianyu,Zhao Renda

Strategic Study of CAE 2010, Volume 12, Issue 3,   Pages 108-112

Abstract: And a fully stochastic process model was developed to analysis time-dependent reliability.Through the example,this method is simple and convenient and can supply a basis for structural assessment

Keywords： existing structure     stochastic process     time-dependent reliability     action effects     resistance deterioration    

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Fully Self-driving Future Hits the Brakes

Chris Palmer

Engineering 2023, Volume 26, Issue 7,   Pages 6-8 doi: 10.1016/j.eng.2023.05.002

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Title Author Date Type Operation

Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Journal Article

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

Yaoru LIU, Zhu HE, Bo LI, Qiang YANG

Journal Article

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Journal Article

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

Journal Article

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

Journal Article

Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

Analytical method of capsizing probability in the time domain for ships in the random beam seas

LIU Liqin, TANG Yougang, LI Hongxia

Journal Article

Solving nonlinear differential equations of Vanderpol, Rayleigh and Duffing by AGM

M. R. AKBARI,D. D. GANJI,A. MAJIDIAN,A. R. AHMADI

Journal Article

Endochronic damage constitutive model for fully-graded aggregate mass concrete

SONG Yupu, WANG Huailiang

Journal Article

A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

Journal Article

Multiobjective image recognition algorithm in the fully automatic die bonder

JIANG Kai, CHEN Hai-xia, YUAN Sen-miao

Journal Article

Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

PAN Yong, JIANG Juncheng, WANG Zhirong

Journal Article

Fully stochastic analysis method for structural time-independent reliability

Du Bin,Xiang Tianyu,Zhao Renda

Journal Article

Fully Self-driving Future Hits the Brakes

Chris Palmer

Journal Article