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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: In this paper, an analytical method is proposed for calculating torsional constants for complicated thin-walledThis method uses the free torsional theory and the principle of virtual work to build governing equilibriumThe advantage of this method is that we can easily and directly obtain torsional constants from the torsionalcomplicated thin-walled cross-section is given as a valid numerical example to verify the analytical method, which is much more accurate and simpler than the traditional finite element method.

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Calculating Method for Area Source Model of Particulates

Gu Qing,Yang Xinxing,Li Yunsheng

Strategic Study of CAE 2005, Volume 7, Issue 1,   Pages 41-44

Abstract: Using the back set method of the virtual point source, and referring to the tilt smoke and cloud model

Keywords： atmospheric environment     particulate     area source model     calculating method    

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The Method of Calculating the Value of Perfect Information Based on the Influence Diagram

Liu Yanqiong,Chen Yingwu

Strategic Study of CAE 2006, Volume 8, Issue 8,   Pages 45-49

Abstract:

The problem of calculating the value of perfect information based on the decision tree is analyzed

Keywords： value of perfect information     influence diagram     Howard canonical form    

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An approach to calculating allowable watershed pollutant loads

Yu GUO, Haifeng JIA

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 658-671 doi: 10.1007/s11783-012-0446-3

Abstract: To improve the management of discharge pollutants loads in the reservoirs’ watershed, an approach of the allowable pollutants loads calculation and its allocation, based on the water environment model, was proposed. Establishment of the approach framework was described at first. Under the guidance of this framework, two major steps were as follows: modeling and scenario analysis were involved and should be applied to support the decision of discharge loads management; Environmental Fluid Dynamic Code (EFDC) model was selected as the kernel model in this framework. In modeling step, spatial discretization for establishing cell map in model, data preprocessing, parameter calibration and uncertainty analysis (which is considered as the significantly relevant factor of the margin of safety (MOS)), were conducted. As a result of the research, the model-based approach presented as a combination of estimation and precise calculation, which contributed to scenario analysis step. Some integrated modules, such as scenario simulation, result analysis and plan optimization were implemented as cycles in the scenario analysis. Finally, allowable pollutant loads under various conditions were calculated. The Chaihe Reservoir in Liaoning Province, China was used as a case study for an application of the approach described above. Results of the Chaihe reservoir water quality simulation, show good agreement with field data and demonstrated that the approach used in the present study provide an efficient and appropriate methodology for pollutant load allocation.

Keywords： Source water protection     watershed management     pollutants load allocation     Environmental Fluid Dynamic Code (EFDC) modeling     margin of safety     statistical analysis    

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LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 871-881 doi: 10.1007/s11709-022-0863-8

Abstract: In the work reported here, an analysis method based on the least square support vector machine (LSSVMBased on the proposed LSSVM approach to determine the failure criterion, the limit equilibrium methodthat the maximum relative errors between the proposed approach and the linear failure criterion-based methodand the power-law failure criterion-based method are about 12% and 7%, respectively.

Keywords： slope stability     safety factor     failure criterion     least square support vector machine    

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Calculating frictional force with considering material microstructure and potential on contact surfaces

XU Zhongming, HUANG Ping

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 474-477 doi: 10.1007/s11465-007-0082-y

Abstract: A method based on the energy dissipation mechanism of an Independent Oscillator model is used to calculate

Keywords： coefficient     dissipation mechanism     universal adhesive     interfacial     Independent Oscillator    

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A New Explicit Equation for Calculating the Friction Factor for the Turbulent Flow in Pipes

Wang Yong,Yuan Qi

Strategic Study of CAE 2006, Volume 8, Issue 6,   Pages 83-88

Abstract: discommodious.The intelligent fitting method for binary nonlinear polynomials was presented in orderto obtain a high precise and simple form explicit equation for calculating the friction factor.polynomials term were searched to obtain the optimum function by genetic algorithms combined with matrix methodFitting the data calculated by Colebrook equation with the above method, a new explicit equation forcalculating the friction factor for the turbulent flow in pipes was obtained.

Keywords： turbulent flow     friction factor     implicit Colebrook equation     genetic algorithms     intelligent fitting method    

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Calculation for the Cross Section Size of Flue Collector of Master-Slave mode Discharging System

Huang Rui,Yang Lizhong,Fan Weicheng

Strategic Study of CAE 2001, Volume 3, Issue 11,   Pages 45-48

Abstract:

Flue collector of master-slave mode discharging system in domicile kitchen can be taken as one dimensional vertical steady flow with friction. By calculation of the distributional condition of the physical parameter of mobile phase and particle phase of flow, it can ascertain the flow condition of particle phase and further decide the discharging condition of fume. And it is affected by some conditions, such as highness of discharging system, diameter of flue and composition of material and so on. Through presetting the highness of discharging system and ensuring a well discharging condition, the diameter of master flue can be got to fit the condition. So a better size of cross section can be found for pipe laying, which both meets the discharging condition of fume aiwl economizes the construction material.

Keywords： multiphase flow     master-slave mode discharging flue in kitchen     calculating model    

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Comparison of shallow tunneling method with pile and rib method for construction of subway station in

Sina AMIRI; Ali Naghi DEHGHAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 704-717 doi: 10.1007/s11709-021-0746-4

Abstract: In the present study, a comparison between the new shallow tunneling method (STM) and the traditionalpile and rib method (PRM) was conducted to excavate and construct subway stations in the geologicalThe maximum ground settlement of 29.84 mm obtained from this method was related to the station axis,

Keywords： shallow tunneling method     pile and rib method     ground surface settlement     subway station construction    

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Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 448-455 doi: 10.1007/s11709-014-0262-x

Abstract: classification method is confirmed by Japan Highway Public Corporation that this method can figure outBased on these advantages of method, in this study, according to data of five deep and long tunnelsin Iran, two equations for estimating the value of method from and classification systems wereThese equations as a new method were able to optimize the support system for and classification systemsFrom classification and its application in these case studies, it is pointed out that the method

Keywords： JH classification     Q and RMR classification     new method    

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Independent cover meshless particle method for complex geotechnical engineering

Jianqiu WU, Yongchang CAI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 515-526 doi: 10.1007/s11709-017-0428-4

Abstract: A new Independent Cover Meshless Particle (ICMP) method is proposed for the analysis of complex geotechnicalIn the ICMP method, the independent rectangular cover regardless of the shape of the analysis model isthe meshless interpolation function of the independent nodal cover, and the Cartesian Transformation MethodThe present method has a simple formulation and a low computational cost, and is easy for the numericaltypical numerical examples are presented to demonstrate the accuracy and robustness of the proposed method

Keywords： meshless method     particle method     independent cover     CTM     geotechnical engineering    

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3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 57-68 doi: 10.1007/s11709-012-0139-9

Abstract: The three-dimensional mode-deformable discrete element method (3MDEM) is an extended distinct element

Keywords： mode discrete element method     elastoplastic     numerical method     discontinuum     contact    

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The smoothed finite element method (S-FEM): A framework for the design of numerical models for desired

Gui-Rong Liu

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 456-477 doi: 10.1007/s11709-019-0519-5

Abstract:

The smoothed finite element method (S-FEM) was originated by G R Liu by combining some meshfree techniqueswith the well-established standard finite element method (FEM).

Keywords： computational method     finite element method     smoothed finite element method     strain smoothing technique    

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Explicit optimization method for cutting-screw-thread on the basis of dual-RSM

Zhengbao LEI, Shubin WEI, Qingyun DU

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 423-430 doi: 10.1007/s11465-010-0109-7

Abstract: Second, the peak acceleration function of each parameter by using response surface method (RSM) is obtainedA dual RSM-based explicit method is proposed.This method can satisfy the demand for engineering accuracy.

Keywords： vehicle engineering     crash     safety     explicit method     response surface method    

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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 in

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

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Title Author Date Type Operation

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article

Calculating Method for Area Source Model of Particulates

Gu Qing,Yang Xinxing,Li Yunsheng

Journal Article

The Method of Calculating the Value of Perfect Information Based on the Influence Diagram

Liu Yanqiong,Chen Yingwu

Journal Article

An approach to calculating allowable watershed pollutant loads

Yu GUO, Haifeng JIA

Journal Article

LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Journal Article

Calculating frictional force with considering material microstructure and potential on contact surfaces

XU Zhongming, HUANG Ping

Journal Article

A New Explicit Equation for Calculating the Friction Factor for the Turbulent Flow in Pipes

Wang Yong,Yuan Qi

Journal Article

Calculation for the Cross Section Size of Flue Collector of Master-Slave mode Discharging System

Huang Rui,Yang Lizhong,Fan Weicheng

Journal Article

Comparison of shallow tunneling method with pile and rib method for construction of subway station in

Sina AMIRI; Ali Naghi DEHGHAN

Journal Article

Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

Journal Article

Independent cover meshless particle method for complex geotechnical engineering

Jianqiu WU, Yongchang CAI

Journal Article

3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Journal Article

The smoothed finite element method (S-FEM): A framework for the design of numerical models for desired

Gui-Rong Liu

Journal Article

Explicit optimization method for cutting-screw-thread on the basis of dual-RSM

Zhengbao LEI, Shubin WEI, Qingyun DU

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