bluuebunny/crossref_metadata_2025 huggingface dataset:
Cyclic Triaxial Tests of Saturated Clay and Stability Numerical Analysis of Inland Waterway Slope under Effect of Ship Wave
Authors: Wang Yuan Zhan , Liu Xu Fei , Zhang Zhi Kai , Ma Dian Guang
Published: December 2012

Ship wave is one of the key factors that affect slope stability of inland waterway because of scour and corrosion. In this paper, the investigations on the softening index, the residual strain and the shear strength with cyclic loading of saturated clay were carried out through cyclic triaxial shear tests in conditions of three different ambient pressures in Naji area on the upper reaches of You River in Guangxi. The relationship between softening index and vibration times, the relationship between residual strain and vibration times as well as the shear strength discounting ratio curve varying with cyclic loading were obtained. Based on the tests, the finite element model of inland waterway slope was founded to analyze the stability of inland waterway slope under effect of ship wave.
Geological Significance of Rare Earth Elements in Chinese Mount Huaying and their Applications
Authors: Yi Wei , Wang Hong Jun , Zhou Ting
Published: December 2012

Analyses of REEs in 25 bulk samples collected from the Late Permian Longtan Formation in Mount Huaying district of Sichuan Province were determined useing Inductively Coupled Plasma Mass Spectrometry. The results indicate that REEs patterns are not controlled by materials from the sea, whereas the contribution of land plants is less than 0.5%. The ultimate sources of REEs are from terrigenous material as indicated by negative Eu anomaly. The Mount Emei basalt contributes to REEs enrichment of study area and all samples belong to the LREE-rich type and are enriched in LREEs relative to HREEs. So the sources of REEs are controlled by terrigenous material of Mount Emei basalt. Rare earths are an interesting group of metals that have recently become quite useful in high tech, and today they are strategic materials in the world economy. Besides, REEs play a key role in the green energy sector, REEs wide range of uses.
An Empirical Correlation between Unconfined Compression Strength and Curing Time for Cement-Soil
Authors: Liao Ying Di , Jiang Chao Hua , Feng Xing Guo
Published: December 2012

Different cement types were used to stabilize coastal soft soil. The unconﬁned compression strength of each cement type treated soil was tested at different curing time. The results showed that the higher strength degree cement lead to the higher unconfined compression strength with same cement addition after curing 90 days. An empirical correlation between unconfined compressive strength and curing time was presented to forecast the unconfined compression strength of cement-soil. Additionally, the 14 day and the data of unconfined compressive strength at that time were suggested to use as the basic standard time and standard strength data respectively.
Influence of Deep Foundation Pit Construction to the Surrounding Buildings - Take a Foundation Pit in Haikou as Example
Authors: Zou Ji Nan , Cai Bei Te , Wei Hong
Published: December 2012

This paper takes example of a foundation pit in Haikou, analyzing the influence on the surrounding buildings in the course of the excavation depth, daily rainfall, foundation form of the building and other factors. The results show that the excavation depth and strong rainfall may lead large deformation of the surrounding buildings, and the deep foundation pit has obvious effect on surrounding building with shallow foundation. Therefore, those factors should be considered adequately in the design and construction of deep foundation pit
The Effect on the Dynamic Tests of Prestressed Concrete Simply-Supported Beams Caused by Bearing Constraints
Authors: Liu Jun , Chen Zhen Fu , Gan Yuan Chu , Tao Qiu Wang , Liu Wei
Published: December 2012

This paper carries out dynamic tests of self-compacting prestressed concrete beams, 10 simply-supported and 5 free, then simulates modal analyses. It shows that, via comprehensive analyses of the first four natural frequencies and modes, the simple support can not achieve the ideal confinement effect for dynamic tests. Especially the tested high frequencies and modes are obviously different from corresponding theoretical values, instead the same as elastic-supported beams. The support plays the role of elastic one. The conclusions will provide meaningful references to further researches on prestressed concrete beams such as improving the accuracy of tests, dynamic analyses and theoretical frequency calculation.
Response and Parameter Analysis of Reinforced Retaining Wall under Earthquake Loading
Authors: Liang Jia
Published: December 2012

FEM is use for the mechanical analysis of reinforced retaining wall under earthquake loading. The main results are as following. The displacement and axial force increased with the increased seismic intensity. The displacement and axial force decreased with the increased the length of bar strip. The displacement and axial force decreased with the decreased the spacing of bar strip. The displacement and axial force decreased with the increased physical mechanics parameters of filling. Seismic response was similar under bilateral seismic loading and horizontal seismic loading, seismic response was slightly larger under bilateral seismic loading.
A Double Inequality Method for Calculate the Loading Capacity of a Sheet Pile DIMSP
Authors: Xie Yi Huan
Published: December 2012

The passive earth pressure on the both sides of a sheet pile retaining wall is owing to plasticity bounded, a fact that affects the horizontal loading capacity of the wall. In order to find out a method, that the loading capacity of the wall can be analytically calculated and the mentioned constrain could be token into account, the paper set up a DIMSP model, which consists of mechanics equilibrium principle including two inequalities for the plasticity condition of earth pressure. The deduced solution of the model is capable of calculating the bearing capacity, and possesses the advantages of no additional correction of the cut in depth of the wall. Further more the continuity of earth pressure distribution is ensured by this model, an adjustment of the earth pressure figure is also without difficulty possible. For engineering application some graphics are given, the cut in depth of the wall can be read from them conveniently.
An Analysis of the Collapse Strength of Down-Hole Tubings Loaded by Axial Compressive Forces and Bending Moment
Authors: Xu Jiang Wen , Zhang Hao , Dou Yi Hua , Wang Xiao Zeng
Published: December 2012

Due to collapses of tubings during well testing and completing in HPHT wells, it is required by Petrochina officially to calculate and analysis the collapse strength of down hole tubings with axial forces and corresponding bending moment being taken into considerations. Based on the 4th strength theorem, formulas were derived and method was present to analyze the collapse strength of down hole tubings loaded by compressive axial forces and bending moment to fulfill the official requirements, which could not be accomplished according to published standards and references. And, influences of axial tensile forces, compressive forces and bending loads on the collapse strengths of down hole tubings were studied. It is found that the collapse strength of down hole tubing loaded by compressive axial force is smaller with compressive axial force and buckling bending moment taking into considerations. The bigger the compressive axial forces, the smaller the collapse strengths.
Experimental Research on Failure of Filament Wound Composite Pipe under Axial Tension
Authors: Wen Wei Dong , Li Jian , Cui Hai Tao , Xu Ying , Zhang Hong Jian
Published: December 2012

Experimental investigations were performed on strain characteristic of filament wound composite pipes. Pipes were wound with S-1 glass fiber and epoxy resin, and then subjected to axial tension. Three kind of winding pattern were adopted. The displacement-Load data were recorded. The process of failure was analyzed and functional failure was defined. Based on experimental result of three kind of winding pattern, the effect of winding pattern on axial limited load was presented. There is apparently influence on pipes axial limited load caused by winding pattern.
Modeling the Mechanical Behaviour of a Subsea Guide Base Subject to Installation and Operations Loads
Authors: Braz José Felipe , Nicolini do Patrocínio Nunes Luiz Eduardo , Grandinetti Francisco José , Camargo José Rui , Alves Correa Valesca
Published: December 2012

Historically, the guide cable system for installation of subsea oil production equipment has proven its efficiency. These cables extend from the rig to the wellhead, which are fixed to the guide base posts and will be subject to loads during the installation and operation of the production equipment. The majority of guide base designs have been calculated by analytical methods, although they allow obtaining exact answers in all infinite points of a structure, they are not applicable to all cases. This motivated the application of finite element analysis method (FEA) in this work, which from the development of approximate procedures can be applied regardless of the structure shape and loading conditions. This paper consists of a structural analysis of the guide base frame model, generated in Autodesk Inventor® software and analyzed in ANSYS® Workbench. The study brings a diagnostic research using a quantitative and exploratory approach. Different mathematical models were generated to obtain the results at the most critical points of the structure in order to determine its resistance to the loads applied during installation and operation, taking into account the criteria laid down in DNV 2.7-3, API 17D 1st Ed and von-Mises equivalent stress.
Comparative Study on Ultimate Pullout Resistance Test and Theoretical Derivation of Flexible Pressurized Anchor with Numerical Simulation Result
Authors: Zhang Xuan Li , Wei Wen Bin
Published: December 2012

The study on anchorage characteristics of flexible pressurized anchor should be along with theoretical analysis, numerical simulation and test study. Through comparing three calculation results, it is concluded that the theoretical analysis and numerical simulation can authenticate the correctness of calculation process each other; After considering the situation that friction coefficient changed with different contact pressure stress, the deviation of calculation of theory derivation and numerical simulation with experimental results significantly reduced; Anchor was simplified for anisotropic composite material body, which should be able to better reduce deviation among test, theoretical derivation and numerical simulation calculation.
The Interaction of Holes on Stress and Strain Concentrations in Uniaxially Loaded Tensile Plates
Authors: Yang Zheng
Published: December 2012

Abstract. The elastic stress and strain fields of plates containing one central hole and two auxiliary holes subjected to uniaxial tension are examined using finite element method. The interaction between holes and the thickness effect on stress and strain concentration factors are investigated. It is shown that the distributions of strain concentration factor and stress concentration factor are different near central hole and auxiliary hole, and both of them depend on the hole radii and the distance between central hole and auxiliary hole. There is a minimum value of Kε/Kσ in stress concentration region and the quantity and location of this minimum value in plane stress state depend on the r/R ratio and d/R ratio of the plate. There are some specific distances between central hole and auxiliary hole corresponding to the radii of auxiliary hole to make the stress concentration factor in the plate minimum.
The Influence Factors of the Workability of Roller Compacted Concrete
Authors: Tian Xiao Ge , Liu Ying
Published: December 2012

The workability is an important property for roller compacted concrete (RCC). Because of different construction process, the requirement of its workability is differ from the normal concrete. So, the factors which will affect the workability of RCC should be considered in mixture gradation design. The effects of cement content, water cement ratio, maximum size of aggregate and mixing time on the workability of RCC were tested.
Effects of Adding Method of a Novel Haxogen-Free Flame Retardant Agent on the Properties of Wood-Plastic Composites
Authors: Yu Wang Wang , Huang Tao , Xue Dong , Jing Lu , Lei Wen , Si Peng
Published: December 2012

Phosphoric acid, pentaerythritol and aniline were used to synthesize a novel intumescent flame retardant agent(IFR), then IFR was added into high density polyethylene based wood plastic composites(WPC) by three different ways. Thermal degradation behavior, combustion properties and mechanical properties of WPC were evaluated by means of limiting oxygen index(LOI), thermogravimetric analysis(TGA), universal testing and scanning electron microscope(SEM) images of char formed after LOI tests. The results show that when IFR was added directly into WPC, the composite has the best flame resistant property, but the worst mechanical properties; when IFR is dissolved into solution, and the immersion method is adopted, the WPC has the best mechanical properties and better fire retardant property.
Preparation of Calcium Sulfate Whisker by Hydrothermal Method from Flue Gas Desulfurization (FGD) Gypsum
Authors: Yang Liu Shuan , Wang Xiao , Zhu Xin Feng , Du Ling Zhi
Published: December 2012

In this paper, utilizing the purified flue gas desulfurization (FGD) gypsum as raw materials to prepare calcium sulfate whisker (CSW) by hydrothermal method, the effects of the dosage of crystal modifier, reaction temperature, pH, etc. on the crystal morphology of CSW were discussed. The results show that the purified FGD gypsum can replace high-quality natural gypsum for the preparation of the CSW with excellent quality. The dosage of crystal modifier (K2SO4) and reaction temperature have a significant effect on the morphology and aspect ratio of CSW, while pH and reaction time have a minor effect. When the dosage of K2SO4 is 3 wt%, pH is adjusted to 2 and the solution is reacted at 130 °C for 60 min, CSW with excellent quality can be obtained.
Finite Element Analysis and Optimization of S1110 Diesel Engine Body
Authors: Zhao Sen , Cao Xiao Hui
Published: December 2012

In order to reduce the mass ratio of S1110 diesel engine, structural intensity and stiffness analysis are performed on the assembly parts of engine body by using the finite element method. Through comparative analysis of more than one calculation scheme, optimization scheme has been got. To ensure the intensity and stiffness of the engine body is not reduced under the premise, optimization scheme makes the body mass greatly reduced from the original engine body’s 38kg to 13.8kg and the engine mass ratio is reduced from 13.2kg/kW to 11.81kg/kW. The results show that, changing the body material from cast iron materials to cast aluminum materials, the body stress distribution trends are similar, but the cast aluminum body deformation increases; increasing the number of cylinder head bolts to 6 can reduce the deformation of the cylinder liner; a reasonable set of stiffeners can reduce the bearing bore deformation.
Hydraulic System Simulation Analysis of Shearer's Cutting Part Based on AEMSim
Authors: Wan Li Rong , Wang Xing Hua , Li Jian Liang , Zhang Bin , Li Xian Peng
Published: December 2012

Simulation analysis on the hydraulic system of shearer's cutting part was established based on the research of fluid simulation technology. The hydraulic model was built using the AMESim software. By verifying the results, a new method about the rigorous analysis of holistic dynamic property of the hydraulic system is developed and a new way to design new type mining machinery and improve its capabilities is provided.
Simulation and Optimization to Vehicle Interior Noise in Mid and High Frequency Using VAone
Authors: Chen Xin , Gao Chang Feng , Geng Xiao Hua , Xie Chen
Published: December 2012

Finite Element-Statistical Energy Analysis (FE-SEA) hybrid method is better than SEA method for vehicle interior noise analysis in mid frequency. The noise predictions using FE-SEA in mid and SEA in high frequency are good in consistent with the experiments, so the computer-aided simulation using above two methods is a good alternative to experiments. The results shows that the Poly Methyl Meth Acrylate (PMMA) instead of glass as the windshield material can reduce the interior noise at the driver’s ear in mid frequency, also lighten the body weight. The results shows the new polymer transparent material can looked as a good new way for vehicle interior noise reduction and body lightweighting.
Mechanical System Simulation Analysis of Shearer Cutting Unit Based on Adams
Authors: Zeng Qing Liang , Zhang Bin , Li Jian Liang , Wang Xing Hua , Wu Zai Chao
Published: December 2012

Shearer cutting unit is the main working mechanism of the shearer and its performance is a direct reflection of the performance of the shearer. Three-dimensional solid model of shearer cutting unit mechanical system was built by 3D modeling software Pro/E, and then it was imported into ADAMS through a dedicated interface module. After adding constraints and movement driven and calibrating model, the simulation analysis in the ADAMS was established and analysis of the forces of the three key pin hinge point was achieved, which provided the basis for the shearer cutting unit mechanical system design.
McPherson Suspension Simulation Analysis Method Based on ADAMS
Authors: Yao Xing Jia , Xu Cheng Yin , Ma Tie Qiang , Zhang Xiao Tong
Published: December 2012

In order to improve vehicle driving function, the author establishes a three-dimensional model of a sedan McPherson front suspension with ADAMS / CAR, besides, there is an analysis on the wheel vertical beating positioning parameter variation of the suspension when driving. With the evaluation of the rationality of the suspension design parameters, reaching the common method for the analysis and optimization of the vehicle suspension based on ADAMS, by which, we can improve the function of the vehicle suspension system, and save time to design the vehicle suspension.
CNC Machining Simulation and Optimization Based on CATIA and VERICUT
Authors: Ruan Xiao Guang , Cao Han Xin , Cai An Jiang , Li Fu Yang , Zhao Rong Rong
Published: December 2012

This paper briefly describes the role and function of CATIA and VERICUT, and combining this two software as optimization platform built collect modeling, machining, simulation and optimization in one of the CNC machining chain. Through the VERICUT to simulate and optimize the NC program, examples demonstrate the rationality of optimization, avoid the collision, interference and had cut in the production and processing, improve the efficiency in the use of CNC machine.
Structural Parameters Optimization of Waveform Generator Based on LS-SVM and Simulated Annealing Algorithm
Authors: Yang Yu Liang , Qin Jun Qi , Di Chang Chun , Yang Yan Feng
Published: December 2012

For the structural design problem of waveform generator, selected diameter of rubber block, hardness and thickness of block 1 and block 2 as five design variables. Firstly, adopted orthogonal design method, and built initial sample data. Secondly, adopted LS-SVM to exercise the sample data, and selected regularization parameter and kernel function width of LS-SVM based on QPSO algorithm. Finally, optimized the structural parameters of waveform generator based on simulated annealing algorithm. The research provided a theoretic basis for the design of waveform generator.
The Casting Process Optimization of the End Blade of ZLT1200 Axial Flow Pump
Authors: Yin Ying Jie , Yuan Xing Mao
Published: December 2012

The casting process design and simulation of the end blade of ZLT1200 axial flow pump were presented in this paper. Three kinds of casting processes were designed and simulated using ProCAST. The 3D models of the casting processes were set up by Pro/E software. The optimized cast process was selected by simulation results. Practical production of optimized cast process was also carried out. The practical production results indicated that the selected cast process can meet the practical production demand and that end blades with high quality were manufactured.
Analysis of Acoustic Characteristics of a Car Cabin Using Computer-Aided Engineering
Authors: Gomez Juan , Williams Justin , Song In Hyouk , Kim Yoo Jae , Chun Du Hwan , Kim Deok Ki , Na Hae Joong , You Byoung Hee
Published: December 2012

A computer-aided engineering (CAE) model was developed to analyze the acoustic characteristics of a car cabin. Pro/Engineer Wildfire 4.0 was used to three-dimensionally represent the geometry of the cabin. The CAE, using COMSOL Multiphysics 4.2a, was performed to investigate the distribution of sound pressure fields at natural frequencies. The principle mode indices were (2, 1, 1), (2, 1, 1), (1, 1, 1), and (2, 2, 2), corresponding to the modal coefficients 1, 2, 3, and 4 and the natural frequencies of 179.691, 139.276, 221.620, and 231.386 Hz, respectively. The results of the analysis provided insight into the car cabin design to suppress exterior and interior noise.
Overload Characteristics Analysis of Electromagnetic Release with Oil Dashpot Based on ADAMS
Authors: Guo Hui Juan , Su Xiu Ping , Zhang Yi Tao
Published: December 2012

In the analysis for overload characteristics of electromagnetic release with oil dashpot, it was difficult to calculate the dynamic behavior of the oil dashpot having long strokes and moving slowly. A method using finite element analysis to obtain the dynamic characteristics of the plunger in the oil dashpot has been developed. Based on the result of the static characteristics, the dynamic characteristics of oil dashpot release are simulated by using ADAMS. Then the relation between the oil damping coefficient and the plunger’s stroke has been discussed. As a result, it is facile to realize the regulation of tripping time for the release through changing the viscosity of silicon fluid.
Numerical Simulation of Combustion Process in a 350t/d MSW Incinerator
Authors: Yin Shui E , Wu Jun
Published: December 2012

A mathematical model was presented for the combustion of municipal solid waste in a 350t/d MSW-burning incinerator. Numerical simulations were performed to predict the temperature and the species distributions in the furnace, with practical operational conditions taken into account. When the total air supply is constant, reducing primary air and increasing secondary air properly results in the higher total temperature of the furnace and the more oxygen concentration at the furnace outlet, and thereby contributes to the complete combustion of combustibles so that an optimal combustion effect can be achieved.
Simulation Study of Space Spiral Gas-Liquid Separation Technology
Authors: Si Ping Jun , Wang Hua , Cui Cun Yan , Chen Yuan
Published: December 2012

The advantages and disadvantages of the method of separating the liquid from the gas on orbit are analyzed aiming at the propellant resupplying on orbit. A new method named spiral gas-liquid separation is proposed here, which is much simpler and highly efficient. Supposing the hydrazine as the propellant, the flow process of two-phase flow is numerical calculated. The results shows that the separated liquid would acquire higher speed and it would take shorter time for the fluid field to be balanced if the inlet fluid speed is higher with a constant gas-liquid ratio at the inlet. The same would take place if the ratio of the liquid to the gas is higher with a constant inlet speed.
ANSYS Analysis of Heat Model for the Electromagnetic Drying Cylinder
Authors: Wang Zheng Shun , Han Wen Jia
Published: December 2012

In this thesis, the process of electromagnetic drying cylinder was analyzed creating by the dryer finite element model using ANSYS. The conduction thermal analysis, the applied load and solved showed the results of three major components. Which create a finite element model of the process, mainly the preprocessor using ANSYS software to create or import geometric models from other software applications, and then add the material properties. The last of the geometric model meshing and solving process need to enter solvers according to the actual situation. The setting is applied to the thermal load and conditions. Then it is proceed to the finite element solution operator. It final usually the Post 1, or Post2 view results, and based on our experience to judge correctly
The Rotational Extrusion Alloying Al-Ti Composite
Authors: Xu Wei Ping , Ke Li Ming , Xing Li
Published: December 2012

The Rotating Extrusion Alloying (REA) is a process which combined friction stir welding process and extrusion technology. In the REA process, dissimilar metals are mixed, cracked, and subjected to high speed, severe pressing deformation, and therefore rapidly alloy at a low temperature. The Al-Ti alloy has been prepared by REA. The result shows that during REA process, the original materials and the products after synthesis present high energy ball mill and from sintering the compound are avoided, and the contamination to the compound due to the contact with the surrounding atmosphere and high energy balls disappear. REA technology can be alloyed Al-Ti material. Its phases are mainly composed of Al and Al3Ti, which are distributed more evenly in the aluminum. After heat treatment, its phases’ types and pole figures have no significant change, but there is a trend of transition to the non-equilibrium stable phase. Small-angle grain boundaries decrease or even disappear.
Development of Parrametric Modeling for the Spindle of NC Milling Machine Based on ANSYS
Authors: Liu Ling , Li Hui Bing
Published: December 2012

With the development of manufacturing technology, modern CNC machine tools are greatly improved in machine processing range, dynamic performance, the processing precision and reliability with the help of the modern design technology, process intensification and the new function part. The research object is mainly based on a CNC milling machine spindle system, using ANSYS software for the spindle of machine tool modeling, and then puting the design parameters into the already built parameterized model. It is known that the spindle is in high speed operation of the deformation and vibration characteristics by analyzing, the some unreasonable parameters were improved using some assumptions, so that the spindle is more stable and reliable in high speed and super high speed running dynamic performance, thus improving the processing precision fastly. Through the model analysis, this step is simplified in manufacturing prototype, thereby simplifying the cost, shorten the design cycle.
Energy Storage Control Based on Wind Farm
Authors: Wang Xiao Dong , Zhu Jin Hua , Liu Ying Ming , Xie Hong Fang
Published: December 2012

With the increase in wind power generation and network capacity, Wind farm power fluctuations on the grid greatly. In order to improve the operational stability of wind farm grid, at its outlet to increase the energy storage system for the new environmentally friendly vanadium redox flow battery (VRB) to effectively regulate the grid power. According to the VRB equivalent mathematical model using a bidirectional DC/AC converter as VRB storage system power regulator, the corresponding charge discharge control and energy management strategy are designed , and grid-connected wind farm system with VRB energy storage unit are modeled and simulated. Simulation results show that the fluctuations in wind speed Circumstances, the VRB energy storage system can quickly and effectively smooth the fluctuations of the active power of the wind farm output, and can provide reactive support to the grid, effectively improve the operating performance of wind farm.
A Survey of Chaos in Photovoltaic Power System
Authors: Zhou Xue Song , Shen Xue Bo , Ma You Jie
Published: December 2012

Chaos is a kind of quasi-stochastic behaviors of determinate nonlinear system. As one of the most important achievements of nonlinear science, chaos attracted common attention and had been extensively studied in the last four decades. Recently, how to apply chaos has become the researching focus. Chaos control and anti-control is the basic problem of the application of chaos. After introducing the characteristic of chaos and some typical PV systems, this article has a discussion about DC-DC converter that chaos would emerge and the methods to restrain and take advantage of chaos. At last, an example of chaos anti-control is given to verify the effect of controlling. However, there is no certain method for the universal systems and structures. And the diversity of chaotic system leads to diversity of chaos control. Therefore, looking for effective and feasible methods for special plants and control aims is a very important task.
Study on the Importance of Wind Energy Development
Authors: Xu Zhi Qiang , Qian Kai Guo
Published: December 2012

with the development of new technologies, investment costs and operatingcosts of large-scale wind farms has dropped significantly, the market has begun to enter the operational phase. As global demand for energy and environmental pollution in the form of increasingly severe, the development of renewable energy has become a strategic arrangement of the world scientific and technological developmen. Wind power renewable energy in the near future will be the most promising-scale energy.. Foreign large-scale construction of wind power reached 8,000 yuan/kW 0. 4 yuan/kWh is exoected in the next 15years there is a 40% price cut. The large-scale wind farm is about to become a competitive option in the electricity market. The key prospects depend on the cost of the wind power market, and reducing costs is the key to scientific and technological progress and industrial scale.
Preparation and Humidity Control Performances of a Novel Composite Humidity Control Paper
Authors: Yu Ning , Yao Qing Qing , Xu Peng Fei , Hu Zhi Wen , Peng Zhi Qin
Published: December 2012

A novel composite humidity control material was prepared, in which konjac glucomannan grafted on sodium polyacrylate with halloysite loading, adopting aluminum chloride/sodium bicarbonate system to foam, and twice foaming to form porous structure in the composites by heating at 150 °C. The resultant composites were utilized as substrates and applied in a composite humidity control paper making. Humidity performances including hygroscopicity, moisture capacity, moisture absorption and desorption rate were tested. It was found that the composite paper presents good humidity control performances even in amplified experiments.
Research on Simplified Reverse Method for Interfacial Heat Transfer Coefficient (IHTC)
Authors: Su Li Ping , Zeng Jian Min , Chen Jun , Gan Wu Kui
Published: December 2012

The success of numerical simulation of solidification process depends to a large extent on boundary condition. Interfacial heat transfer coefficient (IHTC) can be used to measure heat resistance between casting and mold. Boundary condition of casting and mold varies with the temperatures during solidification process. However, determination of heat exchange on the boundary is very complicated. A new simple reverse method has been introduced in this paper. A casting with simple geometry acts as the standard sample and a thermal couple records the temperature history at the center of the casting during solidification. The solidification simulation of the casting was conducted with different IHTCs. The equivalent IHTC that best fits the measured temperature can be determined by comparing the measured cooling curve with the calculated one.
Modeling and Simulation of Induction Heating with Magnetic Flux Concentrator
Authors: Li Feng , Li Xue Kun , Zhu Tian Xing , Zhao Qian Zhe , Rong Yi Ming Kevin
Published: December 2012

Induction heating possesses wide application in surface hardening for steels. In recent years, the emergence of metal powder bonded magnetic flux concentrator (MPB-MFC) enables induction heating better capability, efficiency, and controllability, therefore the analytical understanding through modeling and simulation becomes necessary for process design and optimization. In this paper, the mechanism of the energy transformation in induction heating with magnetic flux concentrator is carried out. The MPB-MFC assisted induction heating for AISI 1045 steel is studied by comparing the finite element simulation with experimental results. The finite element model solves the coupled electro-magnetic-thermal computation problem, which also involves the consideration of the non-linear material magnetic properties in the process. To verify the simulation, middle-frequency induction heating experiments are conducted to compare with the simulated results. The comparison proves the efficacy of the FEM model, and discloses the inner-correlation of the thermal-magnetic-electric fields in the process.
Machining Process Knowledge Discovery Technology: On the Basis of MBD Process Model
Authors: Wan Neng , Chang Zhi Yong
Published: December 2012

To tackle process knowledge discovery difficulty in machining process, this paper studies knowledge discovery method of 2.5–dimensional machining characteristics based on process model with model based definition technology, and finds out machining process design knowledge with the natural structured process description ability of MBD process model. Firstly, the composition of machining geometry ontology and process ontology is analyzed. Secondly, decision tree between ontology are obtained by analyzing abundant samples of MBD process model. Thus, the process and method of reasoning from geometry ontology to process ontology is achieved. Finally, the validity of process knowledge discovery method is exemplified with a group of MBD process models.
Mechanism Design of a Two DOF Heavy Positioner and Turns-Over Structure
Authors: Tang Yan Hua , Zhao Yong Sheng
Published: December 2012

In order to solve the machining translocation of the nuclear water chamber sealing head, a new Two DOF Heavy Positioner structure is proposed as the auxiliary equipment of processing nuclear water chamber sealing head. The article briefly describes the components of the 2 DOF heavy positioner, analyses the motion of the Turns-over Structure with analytical method and calculates variation of the swinging position of the screw , overturning speed and acceleration with Matlab as a platform，and verifies the correctness and credibility of the results by ADAMS simulation analysis.
Ceramic Fiber Application Research
Authors: Jiao Lei , Jin Bai Yang
Published: December 2012

Ceramic fiber is a kind of fibrous lightweight refractory with many advantages of light weight, thermostability, good heat stability, low thermal conductivity, small specific heat, and resistance to mechanical vibration and so on. As a result of them, it has been used widely in lots of fields, such as machinery, metallurgy, chemical industry, oil, ceramics, glass and electron. From the aspect of the ceramic fiber development, in this essay, the types and preparation methods of ceramic fiber have been listed one by one, and the author focused on analyzing the development trend of ceramic fiber and the application in papermaking industry.
Numercial Simulation on Three-Dimensional Unsteady Flow in a Supercharged Boiler Gas Turbine
Authors: Su Gao , Zhou G.Y. , Du Fei
Published: December 2012

To the unsteady characteristic of three-dimensional flow in the gas turbine blade cascades, based on sliding mesh and a standard turbulent flow model, Fluent software was employed to solve the Reynolds averaged N-S equation. The numberical result of unsteady flow field is obtained in gas turbine cascade for supercharged marine boiler. This paper shows the axial distribution of Ma in the position of β=0 in a calculational period time, and the effect of trails to flow field characteristics. The result can provide guidelines for aerodynamic optimization design of gas turbine stage cascade.
Numerical Simulation on Internal Flow Field of Rolling Bearing under Oil-Air Lubrication
Authors: Tong Bao Hong , Sun Xiao Qian , Su Hong
Published: December 2012

Heat dissipation and working efficiency of transport air in rolling bearing under oil-air lubrication are closely related to the flowing state of oil-air in bearing chamber. For cylindrical roller bearing NF211, numerical simulation model of oil-air flow field in bearing chamber was established combining with the practical structure features of rolling bearing and ignoring the effect caused by roller rotation. Combining with flow field numerical simulation functions of Fluent software, simulation analysis of the flow state in bearing chamber were carried out. Based on k-ε turbulent model, three-dimensional flow field in the bearing chamber and main feature parameters of inner flow were got analyzed carefully considering the effect of twirling. Comparing with the numerical simulation of simplified flow field, it showed that energy dissipation and axial velocity of the air were influenced by the effect of twirling distinctly. Simulation results were expected to give useful references for the optimization design of the oil-air lubrication system in rolling bearing.
Optimization Analysis of Ship Steam Power System with Finite-Time Thermodynamics Theory
Authors: Wei Zhi Guo , Tao Hai Kun , Li Yong
Published: December 2012

A basic model with both property of thermodynamic and heat transfer is obtained by simplifying the prime process of ship Steam Power System (SPS), which is converted into endoreversible Carnot Cycle by the introduction of mean temperature in the cycle process. The design parameters is analyzed and optimized in the view point of finite time thermodynamics (FTT) and entropy generation minimization. Results show that, the temperature ratio (α) and the heat transfer parameter ratio (β) of heat source and heat sink are two important influence factors of cycle system performance, and the increase of α and decrease of β will redound to the reduction of irreversible loss and enhancement of power output.
Precision Analytic Algorithms on Contact Stiffness of Parts
Authors: Wan Fei , Li Guo Xi , Rao Zhi Hua
Published: December 2012

The couplings join the various parts together to form an assembly through contact surface, which the stiffness plays an important role for the machine characteristics. Hertz contact theory constructed the relationship between preload and stiffness from a macro perspective, while MB fractal theory presented the mapping between preload and stiffness from microscopic viewpoint. A more precise contact surface model about load and stiffness is established through learning from each other and cross-linking to prepare for analyzing the whole dynamic characteristics.
Template Assisted Fabrication of TiO2 and BaTiO3 Nanotubes
Authors: Chen Chien Chon , Cheng Chin Hua , Tang Guo Yi , Lin Tai Nan , Lin Chung Kwei
Published: December 2012

This paper discussed fabrication of TiO2 and BaTiO3 nanotubes by sol-gel method and used anodic aluminum oxide (AAO) as template. The mechanical properties of TiO2 or BaTiO3 NTs are not great, so a longer tube can crack easily, leading to the peeling off of the NTs film from the Ti substrate. Therefore, we propose to use AAO as a template, followed by deposition of TiO2 and BaTiO3 NT inside AAO to make a working electrode for further electronic devices.
Reliability LU Appropriate Designs in an HV nLDMOS
Authors: Chen Shen Li , Wu Tzung Shian
Published: December 2012

In an nLDMOS, both the drain-side and source-side engineering by adding Nad and Pad layers to obtain a weak snapback characteristic are presented in this work. In this paper, we will detailedly discuss the trigger voltage (Vt1) and holding voltage (Vh) distribution of a novel high-voltage (HV) nLDMOS device. It’s a novel method to reduce the Vt1 and to increase the Vh. Therefore, these efforts will be very suitable for the HV applications in power management ICs.
Research on Fire Engine Layout Design Based on System Analysis and Equipment Correlation
Authors: Yao Lan , Yu Sui Huai , Jiang Chao
Published: December 2012

Reasonable and scientific equipment layout design can adequately use the interior space to arrange and divide vehicle equipments, and the practical operation can be convenient, quick and safe. Take the anti-chemical fire engine as an example, the systems analysis method of vehicle equipment layout design especially for fire engine was proposed, and the correlation matrix and net were established according to the correlation table method in order to make sure the importance degree of equipments. Finally, three design options are evaluated, and the result proves that this method is a feasible solution.
Research on the Method of Microwave Curing in Selective Laser Sintering
Authors: Yang Lai Xia , Bao Kun , He Cheng , Li Di Chen
Published: December 2012

Curing process takes play an important role in the selective laser sintering. The advantage and disadvantage of several traditional curing processes was firstly analyzed in this paper. And then the collapse, warping and cracking of coated sand parts in the microwave curing process were studied by experiments and also the solutions was put forward. Using microwave heat to curing coated sand parts is not only high efficiency,energy saving and environmental protection, but also reduced the shrinking and the defect rate of the parts in the curing process.
Research on the Method of Reliability Allocation of Diesel Engine Base on the Cost Function
Authors: Li Jia , Guo Ji Ze , Zhou Hai Qing , Wei You Wen
Published: December 2012

In this paper, cost coefficient is introduced by using the technology of FMECA and FTA, and the DM model is proposed, the parameters of cost function are determined by applying the comprehensive evaluation method, the system reliability correlation model is set up by using copula function. the model is nonlinear programming, and the minimum cost is the goal of the model. The reliability allocation for diesel engine is completed by use of genetic algorithm. Finally, the feasibility and effectiveness of the model are verified through example.
Detection of Polycyclic Aromatic Hydrocarbons in a Soil Sample with Photon Ionization Technique
Authors: Li A Dan , Chen Min Zi , Guo Wen Feng , Zimmermann Ralf
Published: December 2012

An electron beam pumped rare gas excimer lamp (EBEL) was utilized to emit the intensive vacuum ultraviolet (VUV) radiation at 126 nm for soft single photon ionization (SPI) of polycyclic aromatic hydrocarbons (PAHs) in a soil sample. The VUV light source was coupled to a compact and mobile time-of-flight mass spectrometer (TOFMS) for the on-line measurement of PAHs. The moderate desorption temperature was set at 300 °C to guarantee the rapid evaporation of the PAHs in the soil sample and without decomposition from the larger molecules. With the thermal treatment, sample extraction and cleanup steps were not needed. The system developed herein was found to perform sufficiently well to evaluate the PAHs in the environmental soil sample at ppm level.
Study and Application of Sustainable Development Concept in Design of Industrial Products
Authors: Jia Le Bin , Bo Qi Fang , Yang Mei , Zhang Xin
Published: December 2012

With the rapid development of Chinese economy, China has entered industrialization metaphase, heavy industry stage. The high consumption, high pollution and poor efficiency economic growth mode which the pattern of extensive growth has taken a leading position has never changed while industrial products are improving human living quality and offering convenient for humans. It has become a chief culprit in resources waste and environmental disruption. Therefore, advocating sustainable design in field of design of industrial products and taking energy saving and emission reduction concept as the key point of sustainable design will has distinctly important practical significance for the sustainable development of the whole society.
Study on Dynamic Contact Nature of Cylinder-Plane Friction Couple in the Condition of Rolling-Sliding
Authors: Tong Bao Hong , Cheng Xin Ming , Sun Xiao Qian
Published: December 2012

High stress is caused by sliding in the process of the line-contact has a great influence on its service life. Through establishing a finite element 3D model of the cylinder-plane friction couple for dynamic contact, ANSYS/LS-DYNA is used to analyze the friction pair’s stress in the condition of rolling-sliding. The stress state of the friction is compared in the condition of five different slide-roll ratios by numerical simulation. The results show that the friction’s stress in the dynamic condition of rolling-sliding is rather bigger than in the static condition. Comparing the average value and the maximum value of the von mises and shear stresses in five different slid-roll ratios situations, it can be found that the values of max and average both first increased then decreased with increasing of the slide-roll ratio and the maximum values both appeared at the slide-roll ratio of 0.1. Methods and conclusions can provide some references for the research of the line friction pair’s dynamic contacting nature in the condition of rolling-sliding and the prediction of the friction pair’s service life.
Tempering Numerical Simulation Key Technical Research of Auto Windshield
Authors: Zhang Qing Ling , Shi Yan Guo , Yao Bao Jun
Published: December 2012

In distribution article, the finite element mathematical model of the auto windshield tempering was established through the reasonable model simplified, with ANSYS as a platform, and the wgl450_R auto windshield products as an example. And through referencing to the actual working condition to set boundary conditions, hot-stress coupling field of tempering was simulated and the regularity of temperature and stress distribution was analysed in temperature field and stress field. Stress testing was made in three groups of glass samples based on the large polarizing, and the measured results and simulation results were compwered. The reliability of numerical simulation was proved, and this has the actual production significance.
The Analysis of Compound Packer Rubber
Authors: Zeng Shan Qi , Zhang Zhi Jie
Published: December 2012

This paper uses the steel and rubber redesigned the packer rubber. The new rubber make the packer have a big expansion, the large expansion packer can solve the problem of seal the deformation pipe. According to finite element analysis, calculation and modification, the result show that our new packer can completely seal the sleeve deformation, meet the deformation sleeve sealing requirements.
The Study on Optimal Matching of Light Truck Power Train
Authors: Qian Xiao Meng , Luo Fu Qiang
Published: December 2012

The multi condition driving cycle mode of light truck is established. A comprehensive evaluation system for the vehicle powertrain(VP) optimal matching with integration of dynamic performance, fuel economy and exhaust emission behavior by means of the weighting factors is established. The methods to determine the parameters and weighting factors are established. A simulation model is set for the VP using the software Advisor, and a VP optimization program is compiled by the Matlab optimization toolbox. The model is validated by experiment and used to optimize the power train of a certain type of light truck. The results show that the consideration of the dynamic performance, the fuel economy in the VP matching reduces the exhaust emissions effectively.
The Resistance Performance Study of Cyclone Separator in Gas Turbine
Authors: Wang Zhong Yi , Sun Shao Hai , Deng Yu Lin , Yuan Chang Long
Published: December 2012

The configuration and aerodynamics performance of the inlet system are important aspects in the process of gas turbine installation on naval vessels. Under the requirements, using CFD method simulated four kinds of structure cyclone flow field of the marine gas turbine intake filters, found the lowest flow resistance structure, then verified by experiment. Through comparison, the numerical simulation results agree with experimental study well. The methods used in the article have some reference significance for the design of the inlet system.