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On the MHD squeeze flow between two parallel disks with suction or injection via HAM and HPM

D. D. GANJI,M. ABBASI,J. RAHIMI,M. GHOLAMI,I. RAHIMIPETROUDI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 270-280 doi: 10.1007/s11465-014-0303-0

Abstract:

An analysis has been performed to study the problem of magneto-hydrodynamic (MHD) squeeze flow ofThe analytical methods called Homotopy Analysis Method (HAM) and Homotopy Perturbation Method (HPM) havecapabilities and wide-range applications of the proposed methods in comparison with a type of numerical analysis

Keywords： Homotopy Analysis Method     Homotopy Perturbation Method     incompressible flow     magneto-hydrodynamic flow     parallel    

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Modified Bishop method for stability analysis of weakly sloped subgrade under centrifuge model test

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 727-741 doi: 10.1007/s11709-021-0730-z

Abstract: In this study, a novel modified Bishop method was developed to improve the accuracy of the stabilityThe instability mechanism of the weakly sloped subgrade was considered in the proposed method using thesimulations and experimental tests were conducted to evaluate the advantages of the proposed modified Bishop methodCompared with the traditional slice method, the error between the proposed method and the exact value

Keywords： weakly sloped subgrade     stability analysis     additional force     influential force     modified Bishop method    

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Determination of the principal factors of river water quality through cluster analysis method and its

Liang GUO, Ying ZHAO, Peng WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 238-245 doi: 10.1007/s11783-011-0382-7

Abstract: To enhance the prediction accuracy, principal factors were determined through the analysis of the weightrelation between influencing factors and forecasting object using cluster analysis method, which optimized

Keywords： water quality forecast     principal factor     cluster analysis method     artificial neural network    

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Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 379-384 doi: 10.1007/s11709-012-0180-8

Abstract: method, is introduced.This method is then applied to the seismic analysis of an isolated structure.with the forced decoupling, matrix inversion and iteration methods, it is shown that the presented methodcan produce accurate results while increasing the efficiency of the stochastic analysis.analysis of an isolated structure and can be utilized in practice.

Keywords： isolated structure     stochastic response     non-proportional damping     efficient     accurate     pseudo-excitation method    

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AGCD: a robust periodicity analysis method based on approximate greatest common divisor

Juan YU,Pei-zhong LU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 6,   Pages 466-473 doi: 10.1631/FITEE.1400345

Abstract: The problem of periodicity analysis (or period detection) is a research topic in several areas, suchTo solve the problem, a novel method based on the approximate greatest common divisor (AGCD) is proposedThe proposed method is robust to sparseness and noise, and is efficient.To evaluate the accuracy and efficiency of the proposed method, comprehensive experiments on syntheticExperimental results show that our method can yield highly accurate results with small datasets, is more

Keywords： Periodicity analysis     Period detection     Sparsity     Noise     Approximate greatest common divisor (AGCD)    

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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,through a combination of nonlinear finite element analysis and limit equilibrium analysis.An ideal elastic–plastic incremental analysis method based on the Drucker–Prager yield criterion wasanalyze the influence of grid density on the accuracy of the computation results and was then applied to analysisthat the slope stability safety factors determined using finite element analysis were greater than those

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

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A continuous/discontinuous deformation analysis (CDDA) method based on deformable blocks for fracture

Yongchang CAI, Hehua ZHU, Xiaoying ZHUANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 369-378 doi: 10.1007/s11709-013-0222-x

Abstract: In the framework of finite element meshes, a novel continuous/discontinuous deformation analysis (CDDA) method is proposed in this paper for modeling of crack problems.particularly suitable for modeling the fracture propagation because the switch from continuous deformation analysisto discontinuous deformation analysis is natural and convenient without additional procedures.

Keywords： fracture     crack     propagation     deformable block     continuous/discontinuous deformation analysis (CDDA)    

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Module-based method for design and analysis of reconfigurable parallel robots

Fengfeng XI, Yuwen LI, Hongbo WANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 151-159 doi: 10.1007/s11465-011-0121-6

Abstract:

This paper presents a method for the design and analysis of reconfigurable parallel robots.three types of reconfigurations, namely, geometry morphing, topology morphing, and group morphing, the methodIt is shown that the module-based method not only provides a systematic way of designing a reconfigurableparallel robot, but also offers a unified modeling for robot analysis.

Keywords： reconfigurable parallel robot     topology morphing     group morphing    

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A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Jun XING, Lin LI,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 465-471 doi: 10.1007/s11708-009-0037-6

Abstract: By establishing a research model for aero-damping in a uniform incoming flow, the three-dimension analytical algorithm of the modal aero-damping based on the equivalent viscous damping principle was established. The algorithm, which is suited for low-speed flow, to compute aero-damping is based on classical lift line theory in aerodynamics, according to the analytical solution of unsteady aerodynamic force. According to the analytical equations, the modal aero-damping ratio for different nature frequencies of blades in various fluid field conditions can be solved, and the factors to affect the aero-damping can be determined.The first bend and the first torsion’s modal aero-damping ratios of a compressor blade are calculated by using the above algorithms. The results show that the aero-damping cannot be neglected comparing with the structure damping. It reflects the coupling degree between the flow field and the structure field, so the aero-damping is significant to compute the stress and life of blade.

Keywords： compressor     different     three-dimension analytical     classical     low-speed    

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Analysis of spinal lumbar interbody fusion cage subsidence using Taguchi method, finite element analysis

Christopher John NASSAU, N. Scott LITOFSKY, Yuyi LIN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 3,   Pages 247-255 doi: 10.1007/s11465-012-0335-2

Abstract: Three-dimensional finite element analysis (FEA) was performed to address the resistance to subsidence

Keywords： artificial neural network (ANN)     finite element     interbody cage     lumbar interbody fusion     subsidence     taguchi method    

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Improvement of solidification model and analysis of 3D channel blockage with MPS method

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 946-958 doi: 10.1007/s11708-021-0754-z

Abstract: The moving particle semi-implicit (MPS) method is one of the Lagrangian-based particle methods for analyzingin this paper, a novel solidification model for analyzing melt flowing channel blockage with the MPS method

Keywords： boiling water reactor (BWR)     severe accident     channel blockage     moving particle semi-implicit (MPS) method    

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Development of mix design method based on statistical analysis of different factors for geopolymer concrete

Paramveer SINGH; Kanish KAPOOR

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 10,   Pages 1315-1335 doi: 10.1007/s11709-022-0853-x

Abstract: The present study proposes the mix design method of Fly Ash (FA) based geopolymer concrete using ResponseIn this method, different factors, including binder content, alkali/binder ratio, NS/NH ratio (sodiumThe 2D contour plots were used to setup the mix design method to achieve the target compressive strengthThe proposed mix design method of geopolymer concrete is divided into three categories based on curingIn addition, the factor analysis revealed that the NS/NH ratio significantly affects the compressive

Keywords： geopolymer concrete     mix design     fly ash     response surface methodology     compressive strength     stress−strain    

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Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method

Hanjie ZHANG,Junzhao WU,Dongdong WANG

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 405-419 doi: 10.1007/s11709-015-0310-1

Abstract: The free vibration analysis of cracked thin plates via a quasi-convex coupled isogeometric-meshfree methodmeshfree shape functions in the meshfree region, which is particularly attractive for the vibration analysisSubsequently, this approach is exploited to study the free vibration analysis of cracked plates, in whichThe efficacy of the present method is illustrated through several numerical examples.

Keywords： meshfree method     isogeometric analysis     quasi-convex isogeometric-meshfree method     free vibration     cracked    

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The Following-observing Method for Substance Flow Analysis

Lu Zhongwu

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 18-25

Abstract: Correspondingly, two methods for substance flow analysis were advanced : one of them is “ following-observing” method, and the other-“standing-observing” method.It is emphasized that the following-observing method is applicable not only for studying steady substance

Keywords： methods of substance flow analysis     following-observing method for substance flow analysis     basic equationsfor substance flow analysis     degree of unsteadiness of substance flow    

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Application of random set method in a deep excavation: based on a case study in Tehran cemented alluvium

Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 66-80 doi: 10.1007/s11709-018-0461-y

Abstract: layers of cemented coarse grained soil located in Tehran, Iran by non-deterministic Random Set (RS) methodIn order to enhance the acceptability of the method among engineers, a pertinent code was written insimulations simultaneously, without cumbersome procedure of changing input variables in every individual analysisIt was concluded that performing RS analysis before the beginning of every stage could cause great economical

Keywords： uncertainty     reliability analysis     deep excavations     random set method     finite difference method    

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Title Author Date Type Operation

On the MHD squeeze flow between two parallel disks with suction or injection via HAM and HPM

D. D. GANJI,M. ABBASI,J. RAHIMI,M. GHOLAMI,I. RAHIMIPETROUDI

Journal Article

Modified Bishop method for stability analysis of weakly sloped subgrade under centrifuge model test

Journal Article

Determination of the principal factors of river water quality through cluster analysis method and its

Liang GUO, Ying ZHAO, Peng WANG

Journal Article

Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Journal Article

AGCD: a robust periodicity analysis method based on approximate greatest common divisor

Juan YU,Pei-zhong LU

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

A continuous/discontinuous deformation analysis (CDDA) method based on deformable blocks for fracture

Yongchang CAI, Hehua ZHU, Xiaoying ZHUANG

Journal Article

Module-based method for design and analysis of reconfigurable parallel robots

Fengfeng XI, Yuwen LI, Hongbo WANG

Journal Article

A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Jun XING, Lin LI,

Journal Article

Analysis of spinal lumbar interbody fusion cage subsidence using Taguchi method, finite element analysis

Christopher John NASSAU, N. Scott LITOFSKY, Yuyi LIN

Journal Article

Improvement of solidification model and analysis of 3D channel blockage with MPS method

Journal Article

Development of mix design method based on statistical analysis of different factors for geopolymer concrete

Paramveer SINGH; Kanish KAPOOR

Journal Article

Free vibration analysis of cracked thin plates by quasi-convex coupled isogeometric-meshfree method

Hanjie ZHANG,Junzhao WU,Dongdong WANG

Journal Article

The Following-observing Method for Substance Flow Analysis

Lu Zhongwu

Journal Article

Application of random set method in a deep excavation: based on a case study in Tehran cemented alluvium

Arash SEKHAVATIAN, Asskar Janalizadeh CHOOBBASTI

Journal Article