bluuebunny/crossref_metadata_2025 huggingface dataset:
Static and Dynamic Characteristics Analysis of HTM125 Milling Complex Machining Center Column
Authors: Wu Yu Hou , Ren Yu Hang , Zhao De Hong , Lu Feng
Published: December 2014

The column of heavy double turret five-axis horizontal milling complex machining center is taken as the object of study. Solidworks is used to establish three-dimensional model of milling machining center column, the established modal is be imported into ANSYS Workbench for static and dynamic characteristics analysis. First, by comparing the column deformation, the stress and strain under no-load and load conditions, which is concluded that column design is too conservative and be optimized. Secondly, the modal analysis was carried out on the column, which provides a theoretical basis for the optimization of the column by getting the first six natural frequencies and mode shapes of cloud.
Numerical Study of Flow over Sphere at Supercritical Reynolds Numbers
Authors: Wang Yu Fu , Tao Guo Quan , Liu Dong Xu , Hu Jin Zhao , Wu Zhe
Published: December 2014

Numerical study of flow over sphere at supercritical Reynolds numbers by SST equations model and DES method based on SST model has been done. The simulation on Re = 9.4×105,1.88×106,2.82×106were given. Compared with the Results of experiments, the calculations of drag coefficients at Re=1.88×106、2.82×106agreed well with Achenbach’s results. The trailing vortex structure was shown through the identification method of three dimensional flow field. It had a good agreement with Taneda’s results. The time histories and spectrum characteristics of the drag and the lateral force were investigated by the transient mothod.
Application of Multi-CPU224 and Touch-Screen Communication on Silk Cake Transport Production Line
Authors: Zhang Jin Guo , Li Ming Hua , Ning Ya Yuan , Li Yi Tong
Published: December 2014

This paper discusses master-slave communication among multi-S7-200 CPUs, its application on silk cake transport line, programming to realize data sharing, the motor linkage control, as well as automatic transport process of silk cake. The realization of automatic transport of silk cake reduced silk cake pollution during man-made transport, also reduced labor intensity of the workers. It is perfect integration of mechanical and electrical automation.
Diagnosis of Wood Waste Generated by Wooden-Houses Manufacturers in the Brazilian State of Paraná
Authors: de Araujo Victor Almeida , Garcia José Nivaldo , Gava Maristela , Morales Elen Aparecida Martines , Cortez-Barbosa Juliana , Savi Antonio Francisco , Vasconcelos Juliano Souza
Published: December 2014

The waste generated by industries has been an environmental problem to be solved, even in timber chain, whereas the wood has a high potential of reuse. This paper aimed to collect and disseminate the data obtained on lignocellulosic waste generation produced by manufacturers of wood houses located at Brazilian state of Paraná. This information could help the companies with new discussions on the reuse of this waste. A simple survey composed by three questions was applied in the companies in order to verify the current situation of the theme. After the examination, it was checked that many industries do not have the habit to reuse their residual raw materials, and also all these companies do not have any type of periodic evaluation about waste generation, nor they have any kind of waste separation and quantification.
The Experimental Analysis of Cold Pressed Joint Technology for Selected Sheet Metals Used in an Automotive Industry
Authors: Mucha Jacek , Kaščák Ľuboš , Spišák Emil
Published: December 2014

The paper presents the experimental research into joining materials DX51D and DP600 by clinching. Analyses were performed for four sheet metal arrangement combinations in relation to the die and punch, and the resulting joints were shear tested. Based on the results obtained, changes occurring in the diameter of the joint and pressing force were examined for material DX51D. The analysis of welding current effect on maximum strength of joint was conducted. The strengths of pressed and spot welded joints (commonly used in car body assembly) were compared.
Fabrication of the Electroplated CBN Wheel for Cylindrical Grinding with Abrasive Phyllotactic Pattern
Authors: Liu Zhi Zhen , Wang Jun , Lu Yu Shan , Ma Fei , Xiang Long , Zhang Shan
Published: December 2014

In order to obtain a electroplated CBN cylindrical grinding wheel with ordered abrasive pattern, based on the phyllotaxis theory of biology, the cylindrical grinding wheel with phyllotactic pattern and its mask were designed, this wheel was fabricated with lithography mask electroplating technology, and also some problems on processes were investigated by experiments. The research results that the ordered abrasive pattern on cylindrical grinding wheel can be realized with the help of the phyllotaxis theory and lithography mask electroplating technology, which can give some references for making this kind of the engineered grinding wheel.
Preliminary Experimental Study on Effect of Cutting Fluid on Milled Surface Quality of Iron-Base Superalloy
Authors: Yan Pei , Su Xiang , Wang Gang , Rong Yi Ming
Published: December 2014

As the development of new materials and high speed machining, cutting fluid becomes more and more important because of its functions of cooling, lubrication, corrosion protection and cleaning. The main purposes of cutting fluid are decreasing temperature, reducing friction, extending tool life and improving machining efficiency. In precision machining, high machined surface integrity is the most important. In this paper, a preliminary experimental study on effect of two different cutting fluids on milled surface quality of iron-base superalloy was taken. The surface morphology, roughness, micro hardness and residual stress of the machined surface were investigated. The results showed that the material properties and geometric characteristics of the machined surface were significantly affected by cutting fluid conditions. The effect of cutting fluid on machined surface quality and service performance will become an important research direction. This paper also suggests the main contents of the further research on effect of cutting fluids on machined surface.
Disk Laser Welding of Copper to Stainless Steel
Authors: Sahul Miroslav , Sahul Martin , Turňa Milan , Zacková Paulína
Published: December 2014

The paper concerns with welding of copper to stainless steel. Technically pure Cu and AISI 304 austenitic stainless steel with the thickness of 2.0 mm were suggested as experimental metals. TruDisk 8002 laser with the wavelength of 1.03 μm and a maximum power of 8.0 kW was used for production of dissimilar metal welds. Laser power from the range of 2.3 to 2.9 kW and welding speed from 35 to 50 mm/s were used for welding dissimilar metals. Focal position was direct on the surface of welded metals. Helium with flow rate of 17 l/min was used for shielding of molten weld metal. Light microscopy, EDX microanalysis and micro hardness measurements across copper - fusion zone - stainless steel interface were performed in order to study the properties of the weld joints.
Influence of Tool Design and Process Parameters on Friction Stir Weldability of AZ31B Magnesium Alloy
Authors: Jáňa Miroslav , Turňa Milan , Urminský Ján , Kuruc Marcel , Zifčák Peter
Published: December 2014

The contribution is dealing with suggestion of tool geometry affecting weldability of Mg alloy AZ31B at friction stir welding. Four welding tool made of tool steel H13 (X40CrMoV5-1) with different geometry have been used at welding. Weld joints with high quality have been performed at following parameters: tool revolutions 600 rpm, welding speed 40 to 120 mm/min, angle of inclination 3° and pressure force 38 kN. Area of weld metal accounted fine-grained structure with average dimension of grain 13 μm. Structure is formed by solid solution α - Mg, Al-Mn particles and compound MgAl3Mn2. Strength of weld joint reaches value 265 MPa. Fracture areas accounted character of ductile fracture.
SUV Frame Modal Analysis Based on HyperMesh
Authors: Wei Zhi Hui , Lu Si Tong , Li Zhen Gang
Published: December 2014

One SUV frame in the report was analyzed(FEA)with FE software HyperMesh,modal calculated with Nastran,and then we analyzed the results with HyperView. Fortunately,we obtained five natural frequencies which show that the natural frequencies of the frame above the road surface exciting frequency,where would be no resonance occur. As a result we can image the later improved design of frame structure could provide a theoretical basis.
The Automobile Intelligent Dashboard Design to Enhance Driving Safety
Authors: Fu Li Ming , Yu Hai Yang , Sun Ming Yang , Fan Jia Xu
Published: December 2014

The paper studied on hidden dangers in traffic safety caused by misjudgment of driving operation information, along with the development of the automobile market with increasing inexperienced drivers, and put forward the importance of man-machine information interaction analysis. The fuzzy leveler analysis method of accelerating genetic algorithms was used to analyzed the extent of the needs of inexperienced drivers in different situations for different information. It put forward the design ideas which was brought by new LCD display and sensor technology in the process of automobile intelligent development in dashboard design to enhance driving safety. Combined with automobile dashboard interface optimization design example, put forward the corresponding optimization design of dashboard interface based on the results of the analysis.
The Design of Based on AT89C52 Automotive Air Conditioning Control System
Authors: Wang Chun Lin
Published: December 2014

This topic through to the automobile air conditioning working principle and the structure analysis of air conditioning assembly, with AT89C52 as the core of single-chip microcomputer control system is designed, and the controller hardware and part of the circuit design; To realize fuzzy control algorithm of the control system is established. Expounds how to realize the automation of automobile air conditioning system of fuzzy control; Temperature detection with high precision integrated temperature sensor MF51 implementation; Programming process, adopts the modular design method of each module respectively for programming, debugging, then connect them in accordance with the requirements of control, the debugging, analysis.
The Improved Algorithm to Preview Follower Control Applied Research on Intelligent Electric Vehicle
Authors: Liu Sheng Rui
Published: December 2014

This paper presents an improved preview follower, electric vehicle intelligent driver model of steering control strategy. And from the preview following the model proposed steering control method, and the preview follower algorithm, propose a new preview search algorithm, in order to ensure the preview points fall within the expected path, avoid the path curvature caused by excessive electric cars from the path. In addition, by considering the steady state response, to improve the precision of steering control strategy. Use of the multi domain modeling software Dipolar, combined with the electric vehicle dynamic model, the path model of the steering control strategy simulation. The simulation results show that the strategy is applied to electric vehicle path goal good tracking accuracy.
The Intelligent Dispenser Control System Design Based on FPGA and SRAM
Authors: Cheng Wen Ming
Published: December 2014

he proposed FPGA and SRAM peristaltic intelligent dispensing machine control system design based on the can not only quickly, accurate, intelligent control of dispensing glue, to achieve precise control of the liquid flow rate, can also be used for other work in the intermittent condition of instrument. In addition, through the use of single-chip microcomputer to control the step motor, to achieve the control purpose of peristaltic pump. The user input the motor rotation speed and rotation direction of rotation of the step number, at the same time flexibly, can obtain from the MCU according to its input data generated by a series of control signal, the motor rotate normally. In the dispensing process, through the external interrupt, can be changed at any time of peristaltic pump working mode. This system realizes the machine position control, speed control, interpolation calculation of real-time task, and construct the concept of digital dispenser system. Practice has proved that this system overcomes the dispensing accuracy of traditional time pressure dispensing machine is not high, prone to smearing and other shortcomings, improve the speed and accuracy of the dispensing.
The Research on Controllability of Underactuated Robots
Authors: Wei Jie
Published: December 2014

underactuated robot is a kind of robot that inputs less degrees of freedom system. Due to nonholonomic constraints of nonsystem, integrability and controllability of underactuated robot has become the effective control of primary concern. This paper analyzes the constrained integrability of underactuatedrobot, reviewing the linear controllable of robot systems, it researches progress of the nonlinear controllability and other methods, putting forward the control the direction of further research of underactuated robot.
Cleaning Robot Design and its Application in Electronic Course Group Training
Authors: Li Dan , Xu Wei
Published: December 2014

This paper describes the design of household intelligent cleaning robot, which is an innovative work of collegiate contest. This paper describes the general structure of system, hardware circuit design and software program design. The robot can achieve autonomous movement, garbage cleaning, obstacle avoidance and other functions. It can work in the home, library, exhibition halls and other indoor environment. This design, which is applied to the training of electronic course group, not only cultivates the students' professional interest but also improves the students' engineering practice ability and innovation ability. This design has been successfully used in the electronic course group training of application-oriented universities
Design of Computer Vision and Image Processing Technology Based Car Keys Tooth Identification Detection System
Authors: Li Hong Ying
Published: December 2014

This paper can be used as acar key toothed recognition and detection technology and computer vision, imageprocessing technology combined with interdisciplinary applications. Car lockassembly complicated procedures, identification and car keys tooth detection isone of the key aspects of automotive lock assembly, lock a direct impact on theefficiency of the assembly process. The system can effectively improve theexisting car key tooth detection technology to reduce the cost of car keystooth detection recognition, while also rapid and accurate identification, sothat the entire lock assembly process much more efficient.
Study on Contract Credit Structure of Construction Project Based on SEM
Authors: Liu Hua , Li Zheng
Published: December 2014

Engineeringcontract confirmed the project’global goals like cost、time、quality、safety and environment, clearly stipulated the rights and obligationsof the responsible party. So contract management wass the core of projectmanagement. A good contract credit had a positive effect on the contractmanagement. This article analyzed the LCM (Life-cycle management) of theconstruction project, and attempted toestablish a set of scientific、reasonable credit evaluation system. Based on the SEM (StructuralEquation Model) theory, this paperanalyzed and identified the structure of the contract credit and built the quantitativeevaluation model for the construction contract credit. Through the investigation of the empirical dataanalysis, the model’s fitting results shownthe more reliability and stability.
Based on the Coordinated Development of CGE Model of Affordable Housing and Commercial Housing Research
Authors: Sun Mao , Zhou Yong
Published: December 2014

Construction of affordable housing is not possible, their development and the development of commodity housing market should adapt to achieve coordinated development. Based on previous studies, drawing on ideas put forward specific judgment of affordable housing and the coordinated development of commodity housing, that is, under the premise to meet the total demand, through reasonable adjustments to the proportion of affordable housing and the supply of commodity housing, thereby affecting the price of commodity housing, strikes a reasonable price earnings ratio. In this coordination criteria, the paper uses system dynamics theory constructed residential market system dynamics model, and in Xi'an City, for 2003 and 2020 in Xi'an residential market simulation, testing the validity of the model; Furthermore performed by adjusting the supply of affordable housing a large number of simulation experiments, and ultimately determining the affordable housing and the coordinated development of commodity housing supply ratio between the two is 21.88%: 78.12%, and accordingly proposed to promote the coordinated development of both policy recommendations.
Using of Microspheres of Power Ashes for Gases Cleaning from Sulphur Dioxide
Authors: Yemelyanova V.S. , Kurokawa H. , Dossumova B.T. , Kairbekov Zh.K. , Shakiyeva T.V. , Myltykbaeva Zh.K. , Dzhatkambayeva U.N. , Shakiyev E.M. , Aybasov E.Zh.
Published: December 2014

The composition and structure of the microspheric aluminosilicates of Combined Heating and Power Plants (CHРP) ashes is studied with the help of modern physical-chemical methods (XRD, scanning electron microscopy, BET, elemental and chemical analysis). The activity of microsphere-based catalysts for the reaction of Na2SO3 oxidation by oxygen is also studied by kinetic and potentiometric methods. By means of EPR and Möessbauer spectroscopy it is concluded that iron ions into the composition of cenospheres exist in two states – Fe3+ and Fe2+, thus, the iron (III) is in the form of solitary ions in an aluminosilicate matrix in the range of the iron content 3-4 mass %.
Design and Implementation of Enterprise Invoicing Management System
Authors: Tang Yuan Yuan , Li Shi Yang
Published: December 2014

Enters sells saves themanagement system includes the basic information, stock management, salesmanagement, inventory management, query statistics, system management, andother six most. Database concept design includes entity, the use ofPowerDesigner build system model, etc.; Main form design contains basicinformation module suppliers, add, modify and delete, stock management module,etc.Java and JSP are used in the design of the complete portable networkshopping system .
City Public Facilities System’s Design and Implementation under the Horizon of Environment Behavior
Authors: Liu Hai Ping
Published: December 2014

With the rapid economic development, public facilities demanding to the city public service facilities is increasing. Distinctive expression of urban culture, reflecting the urban characteristics, improving recognition and vividness of the city, is particularly important for the promotion of tourism, stimulating urban economy.City tourism public facilities can express distinctive urban culture, reflect the urban characteristics, and thus the study of urban tourism service facilities and improving the urban tourism public facilities system, for improving the urban development is extremely important.Based on this, this paper presents city tourism public facilities system’s design and implementation under the horizon of environment behavior,designed to background urban construction and development-based, people - behavior - environment as a starting point to guide behavior through environmental science, improve urban tourism research system of public facilities.
Logistics Enterprise Management Analysis of Basic Data Mining Technology
Authors: Hua Yan Jun , Yan Lai , Hui Dang
Published: December 2014

With the development of global economy, logistics industry is gradually developing. Along with the rapid development of e-commerce, Third Party logistics suddenly emerges, which has promoted the development of logistics industry. With the development of logistics industry and information technology, traditional logistics management pattern has already not adapted to the need of modern logistics management. Faced with a lot of product information and customer relationships, new modes of information management must be established to improve the efficiency of management. This paper mainly discusses the application of basic data mining technology in the logistics enterprise management.
Statement of the Main Challenges of the Real Estate Market in China
Authors: Fan Cheng , Chang Pei , Xie Ru Hua
Published: December 2014

As a component of market economy, real estate is running and developing in the environment of politics, society, finance and internation. The most important influencing factors of the present Chinese real estate industry are national policy, population, urbanization level and the income of the residents. The most direct factor which influence the real estate market transaction is the change of Chinese population structure since family planning. This paper elaborates mainly through the search for an aging population present situation and challenge of the urbanization process to the real estate market. It is concluded that less than 30years, the effective implement of Chinese “family planning” is completed an average of 80 years of aging process in the developed countries, the urbanization process will also continue to push forward in the future. However, because of the influence of demographic dividend to weaken, the speed will be slowed. Finally five suggestions were given from five aspects on the elderly physiological psychological characteristics, design, production, structure and sales of real estate, based on the new demographic factors challenge of the current Chinese regional real estate.
Study on the Problems and Countermeasures of the Third Party Logistics Development of Jiangxi Road Passenger Transportation Enterprises
Authors: Hu Chun Sen , Yu Guan Fang
Published: December 2014

Faced with ordinary train speed, inter city train and high-speed rail started to use, increasing private cars, the development of the aviation Spur Line of road passenger transport companies and to road passenger transport based integrated road transport companies have to develop new business areas looking for new economic growth point to enhance enterprise competitiveness in the new environment. Road passenger transport enterprises have road transport vehicle management experience, but also a good resource advantages of regional social, site, brand, network, etc., So the development of logistics has become the first choice of many such enterprises. With the development of logistics in Jiangxi road passenger transportation enterprise's background, current situation, development of the logistics of the road passenger transportation enterprises in the existing problems, puts forward the countermeasures, make accurate positioning, clear direction; a sound system, innovation mechanism; build a platform, tamp foundation; intensive and meticulous farming, create brand, actively develop the third party logistics, a comprehensive modernization
Study on the Improvement of Public Rental Housing Development and Operation Model Based on Full Life Cycle Theory
Authors: Guo Bin , Mu Hai Bo , Jiao Ao
Published: December 2014

Public rental housing plays an important role in the construction ofsecurity housing system in our country, but in the current development andoperation mode, public rental housing project of its own financial viabilityCo., need the government to give large amounts of funds and policy support, thedependence is strong, is not conducive to sustainable development projects,limiting its security role play. In this paper, by using the life cycle costtheory, the construction of public rental housing life cycle cost model,analyze the existing problems in the development and operation mode, and thenputs forward the improvement direction of development and operation pattern,causes it to have certain financial viability, provide policy recommendationsfor the future development of China's public rental housing.
The Countermeasure Research of Foreign Anti-Dumping to China and China's Accession to WTO
Authors: Wang Bo Yun
Published: December 2014

This article analyzes the present situation of anti-dumping and characteristics, clear the main reason and formulate corresponding measures. It would increase the awareness, active avoidance and export enterprises in our country to meet foreign anti-dumping, insure the stable growth of China's foreign trade continues to various aspects, such as a positive impact.
The Influence of Panama Canal Expansion Project on the Containerization
Authors: Chern Lee Min , Ting Chao Lin , Chou Chien Chang , Su Yuh Ling
Published: December 2014

Since the late 1970s, container shipping fell into a high speed development era. The large ship brings the lower cost and more capacities. This paper aims to introduce the evolution of container ship, and then discuss the influence of Panama Canal Expansion Project on container transport routes in the world. The study shows that the competition in shipping market depends upon ship type development.
Theoretical and Empirical Analysis of the Potential Circulation of Rural Construction Land within the County
Authors: Liu Peng Hui , Guo Bin
Published: December 2014

Inefficient use of rural collective constructionland has hampered the economic development,more and more places have startedrural construction land consolidation.The calculation of circulation potentialsof the rural collective construction land can provide the objective basis for its value quantization and financingin balancing urban and rural development, and also basis for the management of the rural collective constructionland. In this paper,the writer defines the potential circulation of ruralconstruction land and the potential consolidation of rural construction landand proposes an idea which through a two-stage four-step calculate thepotential circulation of rural construction land and then by taking Heyang county in shaanxi province as an example,Using the standard methodof household consolidation to calculate theoretical potential,adopt AHP build Real potential influence factor correction system,thusdetermine Realistic potentiality.on this basis can get the theoretical reclamation potentials of rural collectiveconstruction land.which pass PCA (principal component analysis) and The method of analysisof the calculation entropy weight to build the amendment system of circulation potential factors and amend the theory of circulation potential. Finally the writer calculates of the theoretical reclamation potentials of rural collectiveconstruction land.of Heyang county, and givePolicy Suggestions to local rural land circulation.
The Slow City Concept and its Inspiration for Local Culture Protection in Domestic Urbanization Process
Authors: Li Yue , Li Hong Wei
Published: December 2014

With economic growth rateoveremphasized nowadays, modern Chinese society has to be drove into a way thatpushes forward development and transformation rapidly. Corresponding to China’sfast developing urbanization, unfortunately, is the neglect of local culture protection,which leads to the loss of indigenous culture, and causes city features missingduring the construction and so on wherever modern “bulldozers” go. Paper introducesthe concept and planning idea of slow city, and lists several successful casesas the sample of cities which “retain the nostalgia”, in order to proposesome enlightenment for the local culture protection and inheritance in the urbanizationprocess of China.
Research on Optimizing Parameters for Suppressing Vibration of MSCSS under Earthquake Excitation
Authors: Cai Ting , Zhang Xun An , Ding Li , Cheng Ke Peng
Published: December 2014

The dynamic characteristics and the control performances of Mega-Sub Controlled Structure Systems (MSCSS) is investigated in the paper. The control parameters of the structure system, such as the stiffness ratio (RD); the mass ratio of the mega-structure and sub-structure (RM) are studied and their optimal values are obtained in order to achieve better control performances when it is subjected to strong earthquake excitations. Then, trough the nonlinear elasto-plastic analysis, the effectiveness and the feasibility of the proposed MSCSS is demonstrated in reducing the displacement and acceleration responses. The study illustrates that the MSCSS presents good seismic resistance performance, which imply that structural section can be remarkably reduce and achieve to good economic characteristics.
Affect the Linkage Vibration Characteristic Parameter Analysis and Research
Authors: Li Hai Ling
Published: December 2014

Linkage can realize complex motion law, butunder the condition of running at high speed, institutions, thedynamic elastic response of not only make the institutions of trajectorydeviation, also can cause fatigue failure. In this paper, we study the basiccharacteristic of the four-bar linkage, affect the motion law of severalparameters was analyzed.
Low Reversed Cyclic Loading Test for New Precast Concrete Beam to Column Connection
Authors: Yu Jian Bing , Guo Zheng Xing , Guan Dong Zhi
Published: December 2014

On the basis of the domestic and overseas scholars’ research, it is innovative to put forward a new precast frame beam-to-column connection. One full-scale beam-to-column connection in a precast concrete（PC）frame and a beam-to-column connection in a cast-in-place concrete structures were tested under uni-directional cyclic loading that simulated earthquake-type motions. The new-type beam-to-column joint in a precast concrete frame consisted of cast-in-place columns and precast beams. Test results showed that（a）The property and action of precast connections are similar to the cast-in-place connection, it showed that both precast connections and cast-in-place connection have similar seismic performance; (b) The cracking load of precast connection are similar to the cast-in-place connection; (c) All the columns of all specimens did not destroy, it illustrate that it conform to the strong column weak beam. (d) In this experiment test, because the control factor use the bending capacity of beam, it also play the same plastic hinge mechanism as the traditional component. All the longitudinal reinforcement destruction ahead of stirrup in beams, which should be confirmed the guiding ideology of strong shear weak bending. On the basis of the test results, design considerations for the beam-to column connection were recommended.
Study on the Creep Parameters of Salt Rock Constitutive Function
Authors: Zhang Hai Peng , Jin Yi , Ma Long
Published: December 2014

Salt rock is a kind ofthe most suitablemedium for energy storages, because of its strongcreep behavior. "Burgers" and "Norton" is the two classic creep models. This paper starts from the establishment of creep constitutive model to obtain the determination method of creep constitutive parameters.Finally, it takes Nanjing salt rock creep test (2003) as an example to solve the parameters in Burgers and Norton constitutive equations.
Tunnel Face Stability Study in Soft Shallow Tunnel
Authors: Du Jun , Mei Zhi Rong , Chen Yong Zhao
Published: December 2014

With Xiamen Jiaheyuan underground access as the project background, tunnel face stability of soft shallow tunnel was analyzed under the condition of no pre-reinforcement by means of three-dimensional finite element method. The results indicated that the ground was relaxed because the tensile stress appeared in front and top of tunnel face after excavation, at the same time, the ground into the plastic state around the tunnel face. From the point of view of deformation, the displacement of tunnel face were such as the longitudinal horizontal displacement reached the maximum, the vertical deposition following by, and the lateral horizontal displacement being the least. Further analysis showed that the longitudinal horizontal displacement in front of tunnel face mostly produced at 1.0D (one excavation width) distance before tunnel face, the maximum displacement was located at the center of tunnel face. The conclusions remind that engineers also pay attention to the tunnel face reinforcement in front and top of tunnel face to minimize the impact of surface environment during tunnel construction in soft shallow tunnels.
Analysis of FRP/Concrete Interface Creep Using Fractional Derivative Rheological Model
Authors: Wang Xiao Meng , Zhou Chu Wei
Published: December 2014

FRPhas been widely used in the strengtheningof RC structures because of its low density, high strength and anti-corrosion. Long term performance ofFRP/concrete interface is one of the keys for its successful engineering application, and however it has notbeen well studied. In this article a fractional derivative rheological model was proposed which is able to characterize the complicated creepdeformation of epoxy FRP/concreteinterface layer with simple expression. Numerical study revealed thatinterfacial creep might lead to notable stress redistribution and largeinterfacial deformation has possibility to cause weakening of FRPstrengthening.
Comparative Study on the Hysteresis Performance of the Metal Rubber Vibration Isolating Bearing with Different Height-Width Ratio Parameter
Authors: Zhou Yan Guo , Jiang Jian
Published: December 2014

A new kind of Metal Rubber material vibration isolating bearing is developed and the MR bearings with three different height-width ratio are manufactured. The dynamic shear hysteresis properties of the MR bearings are tested. The theoretical dynamic model method is adopted for the comparative analysis. The experimental results shows that with the H-W ratio decrease, the effective shear stiffness and the effective damping capacity of MR vibration isolating bearing will increase, and the total energy dissipation increases greatly. The selection of the H-W ratio of the MR vibration isolating bearing become an important issue in the structural seismic isolation design.
CWR Study of the Mechanical Properties of the Finite Element Method-Based Bridge Vertical Plate Non-Ballasted Track
Authors: Shen Yu Ting
Published: December 2014

With economic development, China’s railway construction is also rapidly developing and its technical requirements are also increasing. In recent years, CWR technology is most used in railway construction, the railway built using this technology is not only smooth, comfortable, but also long life and low maintenance costs, being widely used in railway construction. However, due to restrictions on the production technology and construction conditions, CWR will also be worn, broken, bent, etc., which requires people to continue to study techniques to prevent crawling or off the seam value of rail gauge, to ensure that rail transport safety. This article focuses on the finite element method-based bridge vertical plate non-ballasted track CWR mechanical properties.
Experimental Research on Dynamic Behavior of the Masonry Pagoda Based on Soil-Structure Interaction
Authors: Yuan Jian Li , Rong Lei , Fan Hua
Published: December 2014

Most of ancient pagodas were damaged by earthquakes, and the dynamic behavior is a key factor to determine the seismic strengthening scheme of the pagodas. This research selected a typical masonry pagoda as the object, combined free vibration test with numerical simulation to discuss the influence of dimension change of ground base on dynamic behavior of the pagoda, as well as the construction method of the FEA model based on the soil-structure interaction. The dynamic behavior tested from a 1:15 reduced scale of physical model indicated: comparing with the condition of pagoda pedestal is fixed, the natural frequency of the superstructure is decreasing with the increase of thickness of ground base，which shows the “soft effect” of ground soil to structural stiffness. The influence degree of thickness and plan size of ground base to dynamic behavior of the physical model are simulated by program ANSYS, and the effective dimension range of ground base for the FE analysis of pagodas has been proposed.
Studding of Geo-Seepage Mode of Large Dams Foundations with Allowance Failure Antifiltering Elements
Authors: Aniskin Nikolay Alekseevich , Antonov Anton Sergeevich
Published: December 2014

In this paper authors haveconsidered potentially possible causes of failures in filtration mode offoundation. Methods of calculated prediction of abnormal seepage processesparameters have been considered.
Study on Deformation Law of Longitudinal Seam between Shield Tunnel Segments under Staggered Seam Assembling
Authors: Hu Zhi Fei , Wen Xin
Published: December 2014

This study focus on the deformation law of longitudinal seam between shield tunnel segments, under the load of the overburden layer after assembling. Finite element method is used to calculate the seam opening angle between two adjacent segments under different circumstances, including different joint stiffness, different cap segment locations and different load of cross-section. The result shows that the stiffness of the joints will affect the seam opening amount within a certain range, the cap segment position leaves limited impact on the inner and outer seams opening amount, while different cross-section will have a significant different effect on them.
Subway Tunnel Cross-Section Surveying Based on Ground 3D Laser Scanning Data
Authors: Cao Xian Ge , Yang Jin Ling , Meng Xiang Lai , Zhang Wei Cheng
Published: December 2014

Afterthe construction of subway main structure, in order to realize route adjustmentof alignment and gradient, it needs to survey the cross-section of subwaytunnel. Compared with conventional measuring methods, 3D laser scanning has thecharacteristics of non-contact measurement and can collect space 3D point clouddata with high density, this can improve the working efficiency for the subwaycross-section surveying. Based on the Leica Scanstation 2 scanners this paperanalyzed the 3D laser scanning point cloud data collection procedures and dataprocessing, expounded the subway cross-section surveying method based on pointcloud data; analyzed the feasibility of 3D laser scanning technology in theapplication of tunnel cross-section surveying based on the field validationdata. The results show that the cross-section measured by this method can meetthe technical requirements of route adjustment of alignment and gradient.
Theoretical Calculation and Experimental Research of Shrinkage of High Strength Concrete an High-Speed Railway Bridges
Authors: Gao Ming Zhou , Li Ji Hua , Luo Ru Deng , Wang Hai Long
Published: December 2014

Concrete bridges on high-speed railway are usually constructed with high strength concrete. Because of shrinkage of concrete, large stress and deformation always appear in construction and operation process of bridges. It even leads to concrete cracking. So as to guarantee the safety of structures and smoothness of tracks, correct calculation of concrete shrinkage effect must be done. Concrete shrinkage effect is a very complex non-stress strain problem which is influenced by numerous factors and difficult to calculate. According to the factors considered from different emphasis aspects, a variety of patterns or specifications are formed based on different domestic and foreign models of concrete shrinkage calculation. Combined with the construction of Jiangshan Harbor Bridge (75+2×135+75) m prestressed concrete continuous beam bridge on Hangzhou-Changsha high-speed railway, concrete shrinkage field tests and measurements were carried in which the same mix of high strength concrete as that of the bridge was used. The results of tests and measurements were compared with results of different theoretical models. The effects of high strength concrete shrinkage on high-speed railway concrete bridges were studied and some useful conclusions were obtained.
Correction Method of Cable Tension Measurement Bases on the Principle of Hamilton
Authors: Jin Lei , Qian Zhen Dong , Wang Xiu Yong
Published: December 2014

In order to improve the accuracy of cable tension test, the motionequation of the stay cable with the rubber damper was established bases on the principleof Hamilton. First, the correction method for the damping coefficient of rubberdamper and cable tension was proposed according to the higher modal frequencyand measured frequency of cables difference. Then, take the cable of DongtingLake Bridge as an example, the cable tension was calculated by the proposedmethod and compared with the results of measurement by frequency method.Results showed that the proposed method can improve the accuracy of cabletension test and can effectively evaluate the cable tension condition of thecable-stayed bridge.
A Design Process for a Foldable Container Structure Using a Finite Element Analysis
Authors: Yoon Sang Heon , Shin Yang Jai , Lee Yong Shin
Published: December 2014

This study is concerned with a design process for a foldable container structure using a finite element analysis. A foldable container structure consists of frames, panels and hinge systems. The main structure of a foldable container carries all the loads while a hinge system is designed to provide its foldability. In this work, finite element structural analyses for the main foldable container structure are carried out based on the ISO standard regulation, whose results are then taken for the design of a hinge system. The finite element analysis with two types of hinge systems are also performed. It is found out that the main structure of a standard 20ft container could be used for the foldable container with the same capacity if the corner edge in the side assembly is strengthened. It is also concluded that the hinge systems proposed in this work could be successfully used in a foldable 20ft container.
The Law of Penetration Research of Chloride Ion in Concrete under Chloride Environment and Sustained Load
Authors: Li Wei Hong , Xu Ying Ying , Wu Chang Long
Published: December 2014

This paper studies theinfluence law of permeability of chloride ion in concrete of experiment time,load level, curing condition under the sustained pressure load and thecorrosion environment interaction, which is through natural diffusion method.Experimental results show that with the extension of the test time, chlorideion permeability increases. As the load level increases, there is a tendency ofthe chloride ion content after the first increase and then decrease, theturning point in the middle remains to be further studied. Sufficient waterretention curing conditions, making holes in concrete block unhydratedparticles can continue to get the necessary hydration water, thus continuoushydration leads to increased porosity of roughness, but reduces the resistanceto chloride ion erosion.
Validation Study of Road Surface Water Film Depth Prediction Model
Authors: Luo Jing , Liu Jian Bei , Guo Teng Feng , Hu Cheng Yu
Published: December 2014

Surface water film thickness is one of the main factors, which affect the vehicle safety on slippery roads. Water film depth is influenced by rainfall intensity, grades, cross slopes, drainage length and pavement texture. This paper reviews the research status and makes some comparative analysis of several pavement water film depth prediction models. An experimental validation has verified and calibrated the existing water film depth prediction models results. The experimental validation of the variable in the slope water flow model has been implemented by means of a small scale physical road model in a rainfall simulator, which is constructed in a laboratory. The results of comparative analysis have shown that in the existing water film depth prediction models, the regression models predict values are more closely than mathematical-physical models. Because under different experimental conditions, the regression model calibration parameters are different. In the case of specific road characteristics for prediction of water film thickness, the model parameters can be calibrated to further improve predicting accuracy.
Photoelectric Property Measurement of Organic Materials Based on TOF Method
Authors: Feng Zhi Shu , Li Xiao Ming , Zhao Tian , Tian Chun Yan
Published: December 2014

The principle and experimental setup of photoelectric property measurement withTime of Flight (TOF) method are described. Si sample is used to affirm thevalidity of the experiment setup. The photoelectric property of MEH-PPVmaterials is measured and the mobility is accounted base on TOF method. Moreover,the attention items of using TOF method are proposed. The results consist well with the theoretical value.
Study on Sound Transmission Loss of Multilayer Composite Plate
Authors: Pei Chun Ming , Hu Jing Zhu , Liao Qing Fen , Wan Bao Quan , Yan Yang
Published: December 2014

Adoptingcomposite materials is the most commonly used method for noise control. Thispaper deals with the analysis of the sound absorption property ofcomposite materials. A multilayer composite plate with five layersis analyzed in ANSYS. A Fluid-structure coupled finite element model isestablished with air as the fluid backing. By solving the finite elementequations, the characteristic of the material transmission losses in low andhigh frequencies is obtained. Moreover, the influences of the material parametersinclude density and Young's modulus on the transmission losses are analyzedwhich can provide basis for the design of the absorption composite materials.
Strategies of Lingnan Regional Culture Applied for the Development of Urban Commercial Complex - A Case Study from Foshan
Authors: Zhou Jun Lin , Xie Ling Feng
Published: December 2014

Currently, city complex building forms are too similar with the lack of thematic characteristics, especially the architectural space matching with Lingnan culture design. City commercial space to generate new changes to stimulate the use of geographical and cultural resonance should not only meet the people's inner needs, but also commercial needs, combined with the urban cultural, geographical, consumer psychology and other factors in order to promote Lingnan culture image in the urban commercial complex space.
Analysis of Managed Bus Lane Strategies Based on Microcosmic Traffic Simulation
Authors: Ding Ling , Zhang Ning , Qian Zhen Dong
Published: December 2014

In order todetermine the optimum Managed Bus Lane (MBL) strategies under different traffic conditions, it is essential tocompare the before-after traffic performanceswhen a MBL strategyis produced. Microscopictraffic simulation is often used to evaluate the effects of operation strategies on traffic performances. In addition to the commonly used bus lane strategies, the dedicated bus lane (DBL),intermittent bus lane (IBL) strategies were also studied byVISSIM in this study. Delay and time occupancy wereadopted as evaluation indexes in the evaluation. The analysis results showed that traffic condition has a great influence on the traffic performances for different managed bus lane strategies.Specifically, volumeplays a higher influence on the bus lane performance as compared tobus ratio. It is also shown that the DBL has the advantage of free buses from traffic interference but has the disadvantage of disrupting traffic. IBL strategies also can improve bus service and maintaingood car service. In addition, it is found that when both volume and bus ratio arelow, there is no need to implementany bus lane strategy;if the bus ratio is at a medium level, intermittent bus lanes-near intersection(IBL-NI) strategy is preferred; when the volume is high, intermittent bus lane-basic road segment(IBL-BRS) performsbetter. The results indicate that different MBL strategies should be consideredbased ontraffic conditions.This studycan provide some valuable information for traffic managers to address traffic congestion fromaperspective of transit priority.