Advances in Engineering Research

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23433 articles

Research on Failure Mode and Ductility of Waste Fiber Recycled Concrete Columns under Small Eccentricity

Jing-Hai ZHOU, Hong WANG, Ze LI
This paper studies small eccentric compression test of eight waste fiber recycled concrete columns with recycled coarse aggregate replacement ratio, waste fiber length, and waste fiber incorporation as parameters. The test is carried out on the failure mode and ductility of the waste fiber recycled concrete...

Research on Deformation Characteristics of Single Bubble

Ling-Jun XU, Yang XUE, Gang CHEN, Song ZHANG
The rising behavior of single bubble is investigated in 0.134 Eo 8.588; 0.82 We 4.83 and 0.5 Ta 3.6 by means of CLSVOF method and CSF model. The new empirical relations are obtained by comparing experimental data, simulated data and the empirical relations of scholars. The three formulas can describe...

The Stability Evaluation of Roadway Surrounding Rock in QingFeng Coal Mine

Pai-Ke WEN, Yu-Jun ZUO, Xiao-Yan PU, Yue-Qin QIU, Bo TANG
In order to have a better understanding on the stability of roadway surrounding rock in QingFeng coal mine. Protodyakonov's theory is used to evaluate its stability theoretically, then a numerical simulation is conducted to analyze the stability of roadway surrounding rock in natural state by using the...

Study on Dynamic Characteristics of Amphibious Aircraft’s Water Landing

Xiao-Ming LIU, Yu-Tai HUANG, Zhi-Cheng OU, Xiao-Qing ZHANG
The safety performance of water landing is an important research for the amphibious aircraft. The interactions between the airplane structure and water belong to complex fluid-structure interaction(FSI) problem. The three-dimensional model of water landing for a certain type of amphibious aircraft’s...

The Researches of Landslide Stability Calculation in Earthquake Based on Time-histories Method

Yong SUN, Li-Min XU, Ruo-Fei SUN
In this paper, the vibrative theory of variable cross-section shear beam in structure dynamics was used in the analysis of landslide stability. The displacement, velocity and acceleration of the landslide were calculated with Duhamel technique in which the earthquake curve was used. This method in our...

Differential Method of thin Layer for Retaining Wall Active Earth Pressure and Its Distribution under Seismic Condition

Li-Min XU, Yong SUN
This paper studies the calculation of active earth pressure of retaining structure under the condition of earthquake. By comparing with the Rankine theory and Coulomb theory, we get a very good result. The analytical solutions of the previous works are for single homogeneous isotropic filling .but in...

Effects of Cable Flexural Rigidity on the Free Vibrations of Suspension Bridges

Tatjana GRIGORJEVA, Zenonas KAMAITIS
The natural frequencies of vibration and the corresponding mode shapes of a suspension bridge with varying bending stiffness of cables are determined, and the changes that occur in these characteristics with respect to parametric changes in the bridge are examined. Single span L=64,0 m suspension steel...

Research on Method of Evaluating Anti-wave Ability of Deepwater Long-line Rope Aquaculture Facility

Ya ZHANG, Jian LUAN, Guang-Fa ZHANG, Jun LIANG, Yong CHEN
Based on statics assumption and simplifications, the force and failure mode of deepwater long-line rope aquaculture facility system were analyzed, and maximum tensions of the mooring rope in the system in different sea wave heights (1~7m) were calculated to compared to its break strength and mooring...

Rock Mechanics Study on the Recovery of Residual Pillars in Pinglidian Gold Mine, China

Zhen-Bin RAO, Si-Jing CAI, Gang HUANG
The Pinglidian gold mine locates at the Laizhou city, Shandong province, China. Up to 2013, the orebodies had been mined out, however, there is leaving mined voids of about 120,000 m2 and also leaving a large number of ore pillars. The residual pillars have to be recovered. In order to safely recover...

Parametric Design and Experimental Study for Weak Area Structure of Circle Composite Fragile Cover

Ran CAO, Guang-Ming ZHOU, Deng-An CAI, Yi-Fan TAO
A Parametric design method for weak area structure of circle composite fragile cover was proposed by analysis of mechanical properties of circle composite fragile cover and weak area structure, which was confirmed by rush experiments. Firstly, boundary conditions of the weak area structure were determined...

Theory and Application of Rock Burst Prevention Based on Rigid-flexible Integrated Support with Energy Absorbing

Shan-Kun ZHAO, Zhen-Hua OUYANG, Xiao-Lu LI
Based on the theory of stress control for rock burst prevention, rigid-flexible integrated support with energy absorbing was found. In this paper, we tested between flexible yield support and rigid-flexible integrated support with energy absorbing. The results showed that the frequency of rock burst...

Hydrodynamic Analysis of Jack-up Platform in the Spud-can Driving and Pulling Conditions

Zhao-De Zhang, Yu-Hong WANG
The dynamic responses of jack-up platform, in floating state, are calculated numerically. The finite element models of a jack-up are made. And the dynamic responses of the jack-up are simulated when the spud-can is driving downwards at different depths while the jack-up platform is floating on the sea[1]....

Study on Numerical Simulation Method of Gust Response in Time Domain

Jun-Li WANG
Based on unsteady Navier-Stokes equations, dynamic response in vertical gust flow perturbation is investigated for the aircraft. The grid velocity method was introduced to simulate the gust influence in time domain. First, after applying this method to simulate typical NACA0006 airfoil gust response...

On the Determination of Drag Coefficients of Angular Sections Profiles, Isolated or in Group, Using Computational Fluid Dynamics

André COSTA, Fábio PAIVA, Rui BARROS
The angular cross section profiles are increasingly used in tall pole structures such as telecommunication towers, transmission towers and wind energy turbine supporting towers. So, this work is based on the aerodynamic study of this type of profiles for three types of considered arrangement of profiles....

Aerodynamic Study of Wind Flow through a Lattice Tower of Angular Section Profiles, Using Computational Fluid Dynamics

André COSTA, Fábio PAIVA, Rui BARROS
The advancement of technological society in general has stimulated in various fields, such as aeronautical civil mechanical naval and offshore engineering, a need to look for more sophisticated structural solutions. In many cases these solutions resort to lattice towers that, in order to meet several...

Comparative Analysis of Transmission Poles Executed in Mild Steel and High Strength Steel

João SOUSA, Jorge HENRIQUES, Rui BARROS
This work aims at modeling and designing a transmission pole structure for further investigation of the economic benefits associated with various grades of steel. Indeed, it was necessary to develop a population of possible design cases, to check structural safety, from which were selected the less expensive...

Application of the General Method in the Design of Transmission Poles

João SOUSA, Jorge HENRIQUES, Rui BARROS
The work aims at designing a transmission pole structure which global security and stability is ensured through the application of the general method for verifying the lateral flexional buckling and lateral torsional buckling of structural components, as present in Eurocode 3 (EC3).

A Practical Method to Calculate the Prestress of Suspendome Structures

Ren-Jie SHANG, Yan ZHU, Jun-an LI, Yi-Feng ZHU
A practical method to calculate the prestressing forces of suspendome structures using force method is put forward in this paper. For a suspendome structure having n hoop cables, n control points can be selected. A system of linear homogeneous equations with n unknown cable forces can be obtained through...

Experimental Study on Mechanical Properties of Marine Sand and Seawater Concrete

Ming CUI, Ji-Ze MAO, Dao-Guang JIA, Ben LI
As Chinese development of marine resources intensifies in recent years, more and more offshore platforms and buildings, island structures are under construction. However, concrete aggregate and freshwater resources which are used to mix concrete are usually limited in coastal areas or on the islands....

Study on the Relationship between the Law of Crack Propagation of Tunnel Surrounding Rock’s Microscope Structure in Dilative Soil Tunnel with the Engineering Properties

Ke WU
According to the white strong expansive soil in Guangxi Zhuang Autonomous Region of China, the relationship between the processes of crack propagation in tunnel face with the engineering properties is investigated by using the scanning electron microscope. It can be observed that the crack of expansive...

Numerical Simulation of Characteristics of Cavitation and Aeration in Free-flow Tunnel

Yang XUE, Zhi-Ping LIU, Jian-Rong XU, Yu PENG
Outlet structures were apt to occur cavitation damages with high speed flow, and aerators were usually adopted to reduce and eliminate cavitation damages in hydropower project. In this paper, the Realizable k- model and the Volume of Fluid method were used to simulate the characteristics of cavitation...

Numerical Simulating of the Interaction of Vertical Fixed Multiple Membranes with Gravity Wave

Jia-Wei TAO, Jing-Ping WU, Tian-Long MEI, Ling XU
In deep sea or temporary application, the floating breakwater should be best used to attenuate the surface wave. But the most difficulty of floating breakwater is to decrease long wave length wave. Bragg resonance condition appears while incident surface water wavelengths are approximately twice the...

A Design of Resistance Optimization System for Unmanned Submersible Vehicle Based on Response Surface Method

Zi-Fan WEI, Meng-Yun WANG, Qiang YU, Song-Lin YANG
Estimating the sailing resistance of unmanned submersible vehicle when navigating in the water is an important part for designing the hull profile. As there is no wave resistance when the unmanned submersible vehicle navigating in the water, so the main hull resistance mainly includes friction resistance...

Research on the Rolling Motion and Pitch Motion of Planing Boat

Sheng ZHANG, Zi-Fan WEI, Song-Lin YANG
In this paper, a planing boat has been selected as the research object, which has been used as a model to make a new model by scaling. And the free decay experiments have been conducted under different states including different rolling angle, different pitching angle and different ship's draft, whose...

The Material Traces Determination and Significance of Reprinted Belt Conveyor

Gui-Yu LIN, Zhao-Yong LI, Yu ZHOU, Chao ZHANG
The determination of material traces is to meet the needs of the Subsequent production process and conveyor boom exciting force dynamics calculations. According to the conveyor’s performance parameters, the thickness of the material layer can be known, in the course of calculating material traces; By...

Degradation Law of MSW Mixed with Sludge

Jian-Yong SHI, Long SUN, Xiao-Juan YU
The course, speed and duration of degradation of sludge-MSW mixture, which are major factors affecting settlement of landfill, have a direct impact on the stability and reuse of landfill. As today’s quantitative study on refuse degradation focuses on municipal solid waste (MSW), this paper seeks to find...

Solution for Direct Kinematics of 3-PRS Parallel Manipulator Using Sylvester Dialytic Elimination Method

Bao-Lin YIN, Bing-Bing YAN, Jun-Feng SHUAI, Wen-Bo REN
This paper presents the direct kinematics of a 3-PRS parallel manipulator. Through analysis position, the direct kinematics model is established, which is a nonlinear system of three equations in three unknown. The equations are derived using recursively the Sylvester dialytic elimination method. Finally,...

The Analysis on Mechanism and Application of Cementitious Capillary Crystalline Waterproofing Coating

Guo-Zhong LU, Wei-Xuan ZHAO, Li-Juan ZHOU, Xiu-Juan DING
Cementitious capillary crystalline waterproofing coating is a new-type waterproofing agent. It makes up for many shortcomings of traditional waterproofing coating on properties and application. The paper described the waterproof mechanism in detail. The main characters, the technological process, the...

The Uniaxial Constitutive Models of Reinforcement and Concrete for Nonlinear Dynamic Analysis

Hu QI, Yun-Gui QI
The constitutive model of materials is essential to nonlinear analysis, in this paper, uniaxial constitutive models of reinforcement and concrete are summarized, and some meaningful uniaxial models of concrete and reinforcement are proposed.

Research on Dimensional Synthesis and Kinematics of Planar Mechanism

Bao-Lin YIN, Bing-Bing YAN, Chang-Chun CHEN, Chao-Qi CHEN, Lin WANG
The main idea in function generating synthesis of the planar mechanism is the design of a mechanism so that to provide a prescribed trajectory. In this paper a general method for dimensional synthesis is proposed. The synthesis equation is the nonlinear equation with three unknowns, and the equations...

Large Eddy Simulation of a Normally Impinging Round Air Jet with Heat Transfer at a Reynolds Number of 4400

Yong-Ping LI, Qi-Zhao LIN, Tao-Hong YE, Zuo-Jin ZHU
To explore the heat and fluid flow characteristics of normally impinging round air jet, a large eddy simulation (LES) of the jet flow at a jet-issuing Reynolds number of 4400 for a orifice-to-plate distance equal to five jet nozzle diameters was encompassed using a computer code OpenFoam. A comparison...

Comsol 2D Simulation of Heavy Oil and Bitumen Recovery by SAGD

Bo ZHAO, Yang LIU, Yan-Yan LUO, Guang-Qing ZHANG
In western Canada, the heavy oil thermal recovery technology SAGD (steam-assisted gravity drainage) has been widely used in heavy oil recovery, and achieved good production effect. In this paper, the engineering background is that during the SAGD process at a Canadian oil sands block, trying to obtain...

Numerical Simulation of the Combustion Stability for Low Concentration Methane in a Perfectly-stirred Reactor

Quan-Wei DENG, Xin-Hua LIU, Qi-Zhao LIN
The combustion stability of low concentration methane in a perfectly-stirred reactor is numerically studied by Chemkin software and GRI-Mech 3.0 mechanisms, considering the influence factors of residence time, methane concentration, preheating temperature and heat loss, the following conclusions can...

Finite Element Simulation Analysis for Stress States of Hot Dip Galvanized Fasteners

Rui LI, Hong-Yun YU, Guo-Yong LI, Min-Bo YU, Zhi-Hua ZHU, Zhou-Xuan LI
This paper establishes models for all the components of hot dip galvanized fasteners under working conditions, and also carries out assembly modeling based on their assembly relationships. Subsequently, these operations including finite element mesh generation, restriction of boundary conditions, definition...

Numerical Simulation of 2D Elastic Problems Using RBF-FD Method

Wei LI, Chun-Guang LI, Hong ZHENG, Hong-Wei GUO, Zhi-Fen WANG
This work applies the radial basis function-finite difference method (RBF-FD) for the solution of 2D elastic problems. Compared with traditional finite difference methods based on polynomial interpolation, the RBF-FD does not require a regular arrangement of nodes but can achieve high accuracy. With...

Random Reliability Analysis of Gravity Retaining Wall Structural System

Zun-Qun XIAO, Jie HUANG, Ya-Jun WANG, Cai-Yun XU, Huan XIA
According to present deficiency of gravity retaining wall design method and considering the fuzzy uncertainties of the parameters of stochastic variables, first-order second-moment method (FOSM) is adopted to set up fuzzy random reliability analyzing model. By using decomposing theorem and by introducing...

Suppression of Pressure Oscillations for Supersonic Cavity Flow with Passive Control

Chao ZHANG, De-Jun SUN, Zhen-Hua WAN
Large eddy simulation (LES) for a supersonic Mach 1.8 flow past 2D cavities with/without passive control is carried out to investigate the characteristics of oscillations, and the dynamic mode decomposition (DMD) is used to identify the dominant flow structures with pertinent frequencies. A passive control...

Effect of Freeze-thaw Cycles on Dynamic Mechanical Properties of Ceramsite Concrete

Guan-Yin SHI, Xin QIU, Bo-Fei CHEN, Jiang-Ying CHEN
The effect of freeze-thaw cycles on dynamic mechanical properties of the ceramsite concrete is studied by using SHPB device. The specimens with different ceramsite volume fraction and subjected to 0, 10, 20, 30 and 40 cycles of freeze-thaw respectively, are tested. The experimental results showed that...

Predicting Fatigue Crack Initiation Life of Plate-Like Component by Damage Mechanics and Finite Element Method

Wen-Feng TAN, Yan-Shen TAN
Applied fatigue damage mechanics and finite element method to study the fatigue crack initiation life problems of component. Fatigue crack initiation life is obtained by using the method of additional load, just a stiffness matrix calculation, greatly reducing the workload of calculation. With the damage...

The Effect of Shock Wave Strength on Shock Bubble Interaction

Jie YANG, Zhen-Hua WAN, De-Jun SUN
The three-dimensional shock-bubble interaction is investigated numerically using high-resolution piecewise parabolic method, in which both the viscous and turbulence effects are considered. The bubble is fixed at the same size and is accelerated by a planar shock wave of different strengths, in which...

High-rise Structure Vibration Control with Gyroscopes

Hao-Xiang HE, Rui-Feng LI, Kui CHEN
The traditional damper is inconvenient for high-rise structure. The rotor of gimbal gyroscope has two rotational degrees of freedom, and the gyroscope produce moment to resist two orthogonal displacements when the rotor rotates with high speed, so the structure deformation under external force can be...

Multi-dimensional Seismic Control with TLD in Vortex Effect

Hao-Xiang HE, Kui CHEN, Rui-Feng LI
Seismic control of the horizontal and torsional response by cylindrical tuned liquid dampers is studied. The hydraulic pressure model of the cylindrical TLD including pulse pressure and convection pressure is established by membrane analogy method. The torsional model of the cylindrical TLD is obtained...

Shear Stress in Torsion of Circular Shafts--Not a True Stress, but an Equivalent Stress

Jian GUO, Wen-Ba HAN, Gang WANG
The present research argues that the shear stress of shaft in torsion is not a true stress but an equivalent stress, based on the phenomena that the stress disproves the plane assumption, that the body part in torsion is unable to maintain equilibrium, and that shear stress on the longitudinal section...

A New Accelerating Creep Constitutive Model and its Parameters Sensitivity Analysis

Cai-Hua SHEN, Wen-Wu WANG, Bing ZHANG
In this study, Perzyna visco-plasticity theory and Nishihara component model were combined to establish a universal creep constitutive model for describing the entire process of creep, including transient creep, steady-state creep and accelerating creep. Based on the internal energy theory, the constitutive...

Dynamic Response of Functionally Graded Circular Plate under Thermal Shock

Jing-Hua ZHANG, Shuang-Chao PAN
Dynamic response of a functionally graded material circular plate subjected to thermal shock is investigated based on the von Kármán’s plate theory. The geometric imperfections of the plate are taken into account and the bottom surface of the circular plate is subjected to uniform thermal shock loadings....

Dynamic Buckling of a FGM Euler-Bernoulli Beam under Thermal Shock via Symplectic Method

Jing-Hua ZHANG, Xing-Xing ZHAO
Based on Euler-Bernoulli beam theory, the dynamic buckling of a functionally graded beam subjected to thermal shock is investigated in the Symplectic space. The boundaries of the FGM beam are simply supported at one end, and the other is clamped. The dynamic buckling problem is reduced to zero-eigenvalue...

The Earth Excavation and Support Technology of the Connection Engineering on the both Banks of the River Bridge

Ye-Mei ZHOU, Ya-Yun XIONG
The earth excavation and supports technology of the connection engineering on the both banks of The River Bridge have ability the characteristics of deep earth excavation, large area, traffic road surface and underground culvert .The entire foundation pit uses the spu-400larsen steel sheet shutter pile...

Vibration Analysis of Moderately Thick Coupled Rectangular Plates

Jiu-Fa WANG
Taking into account the impact of the flexural and in-plane vibrations, an improve Fourier series method is employed to analyze the vibration of moderately thick coupled plates. The vibration displacement is sought as the linear combination of a double Fourier cosine series and auxiliary series functions....

Model Test on a Metro Station Deep Foundation Construction Adjacent to Some Underground Structures

Ke WU
During the metro station construction, it is always inevitably encounter to lots of crossing some adjacent structures by side of those. The Chegongmiao subway station is adjacent to the first subway of Shenzhen and Fengshengding shopping street, which is on the planning construction of Shenzhen 11th...

Topology Optimization Design of Bus Body Structure Based on Altair-optiStruct

Xiu-Chun WU, Wen-Qiang ZHENG, Pan ZHOU
In this paper, the Finite Element Method (FEM) is used to study the topology optimization of bus body structure by Altair-OptiStruct software. Firstly, based on the maximum principle of optimization space, the topology optimization area is established. Then the topology optimization is calculated under...