bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Vacuum Preloading for Soft Foundation Treatment in Grain Storage
Authors: Liu Qi Xia , Zhao Yang
Published: November 2012

The application of vacuum preloading for soft foundation treatment in grain storage is introduced from its principle, design, construction and the inspections. Its obvious effect is proved by example. The vacuum preloading method can effectively improve the soft soil foundation’s physical and mechanical performance and increase the bearing capacity of soft soil of coastal areas. For the grain storage, oil depot especially for large reserves of oil depot project, the treatment effect is remarkable. It can be widely used in the ground treatment in the soft soil area for grain storage, oil depot construction.
Distribution of Lateral Pressure in Large Diameter Squat Silos under Eccentric Discharge
Authors: Zhu Ya Zhi , Meng Shao Ping , Sun Wei Wei , Wang Wei , Feng Yu Long , Jin Chen Hua
Published: November 2012

The eccentric discharge of stored solids in squat silos has caused many failures, especially that in metal silos. However, these failures are poorly interpreted by specialists. In particular, the lateral pressure distribution on vertical wall couldn’t be accurately recognized. In order to set out the method to calculate static lateral pressure, the appearance of stored solids in silos after eccentric discharge is researched. In this study, based on the overall balance method (OBM), the method for calculating lateral static pressure in squat silos after eccentric discharge is proposed. Four cases are listed according to different discharge stages. Calculative formulae are deducted for each case. This method is also focusing on unsymmetrical distribution characteristic of the lateral pressure. Two calculative examples are listed and the results of which illustrate the necessity of lateral pressure calculation in squat silos.
Analysis for Eccentrically Loaded of Steel Bolted Group
Authors: Hsu Wei Ting , Lue Dung Myau , Liao Cheng Yen
Published: November 2012

Two general approaches for the analysis of eccentrically loaded connections are described in the current AISC Specifications. The first method is the conservative elastic analysis. The second method is the instantaneous center of rotation method which gives more realistic values but is extremely tedious to apply. The 1989 AISC-ASD manual contains design tables intended for vertical loading only. The 2010 AISC manual considers eccentric loading with six specific inclination angles (θ) varying from 0 and to 75 degrees. However, actual loading condition may very likely differ from what has been assumed in the AISC design manual. This study proposes a more generalized solution (75° θ 360°) to overcome the design limitations as inherently made in the design manual. For uncovered cases, AISC Specifications do not offer a guideline on how to handle them. In such situation, engineers have the tendency to use the unjustified elastic method.
Numerical Analysis on Dynamic Behavior of Damping Fasteners in Rail Transit Viaduct System under Wheel Load Drop
Authors: Zheng Xuan Dong , Geng Chuan Zhi , Qu Teng Fei
Published: November 2012

In order to analyze the damping effect of high-elastic damping fastener on rail transit viaduct, Ls Dyna software was use to analyze rail and viaduct vertical vibration under different fastener damping constant. Fasteners with no damping constant and different damping constant are built in finite element model with rail transit viaduct, and the acceleration simulation results of them are compared to find damping effect on rail transit viaduct vibration transmission. The results indicate that the damping characteristic can attenuate vibration produced by wheel rail impact, however as the fastener damping constant are only parts of the whole damping system of the rail transit viaduct, the damping constant is not as better as its increment. The paper attempts to provide advice for employment of damping fastener in excessive vibration region of urban mass transit.
Calculating Analysis of Reinforcing Layer Utilization on Stone Arch Bridge Strengthened by Composite Main Arch Circle Method
Authors: Qiao Wen Jing , Song Yi Fan , Zhang Wen Yuan
Published: November 2012

The calculation formulas for concrete and steel utilization rate of reinforcing layer have been deduced, in view of the underutilization of reinforcing layer material by composite main arch circle method. The calculation formulas is defined as load bearing capacity of reinforcing layer divided by the ultimate bearing capacity of reinforcing layer, combined with initial strain of main arch ring before reinforcement and reinforcing layer section edge strain, take compression zone partial of reinforcing layer subjected to tension and compression as example. The calculation formulas for concrete utilization rate of reinforcing layer is divided into 2 types according to the height of compression zone and on the edge of compressive strain in the reinforcing layer, the calculation formulas for steel utilization rate of reinforcing layer is divided into 1 types according to tension strain of the steel. The results show that controlling the stress and strain of stone arch bridge before reinforcement can make full use of compression resistance on main arch ring, strength of materials and reduce the waste of materials relying on engineering example. The calculation formulas provide the theoretical basis for calculation and design of the similar reinforcement structure.
Studies on Mechanical Model of Geometrically Pre-Eccentric Optimization Based on a Small Radius Ramp Curved Bridge with Single Column in City
Authors: Qi Zhi Gang , Dong Jun , Hu Dan
Published: November 2012

Under the coupling action of bending and torsion are there such complex mechanical characteristics in a small radius ramp curved bridge with single column in city. Based on Midas/Civil software, a small radius ramp curved bridge with single column is studied in this paper. Under the combined action of the first phase of dead weight, the temperature gradient, the system temperature, the second phase of dead weight and vehicle load, the mechanical properties of a ramp curved beam bridge have been studied in detail for different pre-eccentricity. Then, it is under different eccentric actions that different results with the changes of such variations as support reaction, displacement, shear force, bending moment, torque moment and torsion deformation are discussed. Our investigation shows that reasonable pre-eccentric setting could greatly reduce internal force in the bridge and improve the torque distribution so as to optimize the distribution of internal force in bridge.
Application Study of GIS and GPS in Bridge Structural Health Monitoring
Authors: Yang Yu Li , Dang Xin Hai , Wei Yu Ming , Wang Xue Ping
Published: November 2012

It’s very important that Bridge Structural Health Monitoring to bridge management and maintenance. In this paper,the authors study the Application of GIS and GPS in Bridge Structural Health Monitoring. Introduce the application field of GIS in bridge structural health monitoring and the method of GPS-RTK Technology to measure the bridge three dimension dynamic coordinate, proposed the System General Framework of GIS in Bridge Structural Health Monitoring,mainly study the problems that acquisition and collection of Monitoring information,the database management scheme of the system, the method that of GIS manage Spatial and attribute information which related to bridge structural health monitoring and to process and analysis the Monitoring data. Also analysis the feasibility of using GPS and GIS technology in a Bridge Structural Health Monitoring.
Analysis of Error Control Techniques for the Urban Bridge Cluster Monitoring System
Authors: Li Yi , Guo Zhong , Chen Bao Chun
Published: November 2012

The urban bridge cluster health monitoring system is a complicated system featuring lots of parameters and hundreds of different types of sensors. The problems of data reliability of the system are the realistic ones that must be resolved in the engineering application. In this paper, in the light of the ideas of error control prevailing in the data communications, the basic considerations, models and mechanism for error control of bridge structure health monitoring system are put forward form the angle of the system and it can be therefore expected that the problems of two kinds of data failure pattern in the system of the tie arch bridge will be thoroughly resolved, the reliability of the system will be increased, and the false and miss warning ratio of the system will be accordingly effectively decreased.
Remote-Controlled Visual Inspection Machine for Bridge Supports
Authors: Tokuomi Saeko , Mori Kazuya , Miura Akihiro
Published: November 2012

We have developed a remote-controlled visual inspection machine for bridge supports. This inspection machine adheres to concrete structures using two sets of suction cups, and ascends by alternating movements of the two sets of suction cups. Attached to the inspection machine is a CCD video camera. Video data of the condition of bridge supports is transmitted wirelessly to the operator. The visual inspection machine can ascend vertical concrete structures and then inspect bridge supports by moving horizontally. The maximum height the machine is capable of inspecting is limited by the length of the power cables as well as the weight. It will be able to inspect higher bridge supports when the weight of power cables can be reduced. The weight and the dimensions of the testing machine are about 17 kg and 84 cm by 72cm, respectively
Study on Reliability Evaluation Method of Existing CFST Arch Bridge
Authors: Zou Yi Song , Hou Hai Tao , Peng Wei
Published: November 2012

Based on reliability theory, the application calculation method of Concrete Filled Steel Tube (CFST) arch bridge system reliability index is studied. Select the most unfavorable load distribution in working condition of maximum moment and deflection at the mid-span, from the angle of strain energy, calculated the weights of CFST arch ribs component. On the basis of the grading standards of reliability assessment of the existing bridge components and the critical structures, CFST arch bridge system reliability assessment grading standards are constructed. CFST arch bridges reliability index are evaluated from two aspects (the arch ribs and segment) in this article. As the CFST arch bridge locates in the marine environment, corrosion environment is the serious level of C5-M, steel pipe corrosion is the major diseases of CFST, arch rib which on the corrosion conditions were assessed. The results show that the method can effectively assess the situation of CFST arch bridge.
Analysis of Deflections and Stresses for Laminated Composite Plates Based on a New Higher-Order Shear Deformation Theory
Authors: Lan Xiang Jun , Feng Zhi Hua
Published: November 2012

Based on the new simple third-order shear deformation theory, the deflections and stresses of the simply surported symmetrical laminated composite plates are obtained by using the principle of virtual work .The solutions are compared with the solutions of three-dimensional elasticity theory, the first-order shear deformation theory and the Reddy’s higher order shear deformation theory . Results show that the presented new theory is more reliable, accurate, and cost-effective in computation than the first-order shear deformation theories and other simple higher-order shear deformation theories.
Anlysis on Freeze-Thaw Cycling Damage of Layered Hybrid Fiber Reinforced Concrete
Authors: He Dong Qing , Liu Bo
Published: November 2012

Based on the least squares theory and a damage variable , a damage model is formed for the freeze-thaw degradation of the layered hybrid fiber reinforced concrete (LHFRC). By the model the degradation equations for the LHFRC and the plain concrete(PC) are regressed with the experimental data, which are identical in the initial phase and different in the damage propagation phase and the is used to describe the damage process of concrete subjected to freeze-thaw cycles. The of LHFRC is smaller than that of PC in the damage propagation phase. Furthermore, the frost resistance of LHFRC is stronger than that of PC due to steel fibers and polypropylene fibers having retarded the degradation of concrete.
A Comparative Experiment on the Bond-Slip of Reinforced Concrete
Authors: Cai Chuan Guo , Chen Guo Liang
Published: November 2012

A new test device, which can be used for measuring the stain and the displacement on the adhesive interface while the slip occurs within the reinforced concrete, is proposed and designed. With that, a comparative experiment is carried out on a group of the reinforced concrete columns bearing alternating load to obtain the τ-s curve. The hysteretic curves of these specimens are recorded timely. The result from the one-way repeated load is similar with several well-known expressions which are commonly cited at home and abroad. That from the low cycle load reveals some certain characteristic of the alternating slip, which there isn't in the static test. The experimental data could make contribution for the numerical simulation on bridge and seismic building.
Investigating Nonlinear Vibration of a Fully Clamped Nanobeam in Presence of the van der Waals Attraction
Authors: Askari Amir Reza , Tahani Masoud
Published: November 2012

In this paper, combination of the Galerkin decomposition procedure and homotopy analysis method (HAM) is utilized to derive analytical approximate solutions for nonlinear vibration of a fully clamped nanobeam used in the applications of nano-electromechanical systems (NEMS), under the effect of van der Waals (vdW) force. The model accounts for the inherent nonlinearity of distributed vdW force and geometrical nonlinearity of von Kármán mid-plane stretching as well as the influence of applied axial loading. The HAM is also optimized to accelerate the convergence of approximate solution. The present results are found to agree well with those obtained by the fourth-order Runge-Kutta method.
The Use of Synthetic Aperture Radar Interferometry to Study Geohazards
Authors: Jiao Ming Lian
Published: November 2012

Synthetic Aperture Radar Interferometry (InSAR) provides a new tool to study geohazards.A map of the surface displacement with subcentimeter accuracy can be constructed using,if the Earth’s surface deformed between two radar image acquisitions.In this paper, the research examples of InSAR are introduced firstly.Then Merits and Demerits of InSAR Applicaion in Geohazards Study are reviewed.
Research on Integrated Diagnosis of Contact and Non-Contact Method for Analog Circuit
Authors: Hao Yan Hong , Wang Jia Li
Published: November 2012

Traditional analog diagnoses by contact way generally get voltage, current or frequency response as their inputs. They have some inevitable drawbacks, such as the change of inputs during contacting and the inaccessibility of some necessary notes. Furthermore, contact method rarely does well in multi-faults. It can get high fault resolution or fault coverage only by high complexity of algorithm. This paper proposes a method of Integrated Diagnosis to solve the problems above. This method acquires raw data from both contact and non-contact way. It gets feature extraction and draws conclusions from the two ways respectively, and then fuses the two conclusions into a final decision. This method makes good use of information from multi-sensors. It obtains the advantages of both contact and non-contact way, but avoids the disadvantages of the two. Experiment shows its fault coverage and fault resolution both get an improvement, compared with that of other single methods. At the same time, it diagnoses multi-faults as simple and efficient as single-faults.
Method to Detect Bolting Devices Based on Ultrasonic Guided Wave
Authors: Xu Min Hui , Lan Qiao Qian , Jin Wei Jian
Published: November 2012

Bolting devices is very popular in industrial application, this paper presents a new solution aimed at the problem faced in detecting the construction quality. The solution is based on the engineering practice, and we introduce Ultrasonic Guided Wave NDT technology in the detecting process. Under laboratory conditions, Longitudinal Guided Waves are used in detecting the bolting devices, the experimental results are consistent with the theoretical analysis. At the same time, finite element method is applied into the Numerical Simulation of the propagation of Longitudinal Guided Waves in bolts, thus a test system utilized in detecting the effective length and defects of bolts developed.
The Effect of Abscission of Insulation Lining of Electromagnetic Flowmeter on Output Signal
Authors: Gao Song , Li Bin , Yin Shi Yi , Li Xue Jing
Published: November 2012

In pipe of electromagnetic flowmeter must be installed internal insulation lining to prevent the electromagnetic flowmeter signal is short circuit by metal pipe. However, in the process of using the electromagnetic flow meter, insulation lining is easy to fall off because of the fluid temperature and pressure changes, thus lead to the output signal of the electromagnetic flowmeter is changed. The effect of electromagnetic flowmeter insulation lining fall off to the output signal is analyzed by the theory of electromagnetic flow meters weight function. Get the relationship of the output signal and the insulation lining drop area and position. The paper provides a theoretical analysis method for the effect abscission of insulation lining of electromagnetic flow meter on output signal.
The Application of Multi-Wavelet in GPS Deformation Signal Processing
Authors: He Yong Hong , Wen Hong Yan , Jin Peng Wei
Published: November 2012

With wavelet technology used more widely in GPS deformation analysis, the paper will talk multi-wavelet (the second generation wavelet) theory used for GPS deformation monitoring data analysis. Due to multi-wavelet has a short branch set, orthogonal, symmetric (antisymmetric) and two order approximation characteristics, in the same filter length, using multiple wavelet on deformation monitoring signal can obtain better denoising effect than traditional wavelet. The paper studies signal adopting different preprocessing methods, makes a study of the selection problem in multi-wavelet preprocessing method. The GPS deformation monitoring signal is disposed using different multi-wavelet which adopts optima preprocessing method, and the paper makes a comparison to the conventional odd wavelet. The result confirms: multi-wavelet is more superiority than conventional wavelet, which decreases RMSE, advances SNR, obtains higher analytic precision, conforms the validity and practicability in physical problem, and offers a new road for deformation monitoring signal process
Analysis and Experiment of an Air Vibration Isolation System with Auxiliary Chambers
Authors: Wen Rong Wei , Tan Jiu Bin , Wang Lei , Wang Guan Hua
Published: November 2012

A mathematical model of a single degree of freedom air spring vibration isolation system is established. The model analyzes the influence of structural damping in the air spring vibration isolation system based on the traditional model. This paper establishes the relationship between the working pressure p, the volume ratio of n and system vibration transmissibility T under forced vibration. The experimental results are verified on different working pressure. The results showed that working pressure p has little effect on the resonant frequency of the system and the system vibration transmissibility. The smaller the ratio n, the lower the resonant frequency of the system and the system vibration transmissibility. The environmental excitation frequency range must be taken into account in designing.
Evaluation of 3D Geo-Positioning Based on Bias-Compensated RPCs for Across-Track QuickBird Stereo Imagery
Authors: Wang Weian , Xu Shu Ying , Qiao Gang
Published: November 2012

This paper investigates the geo-positioning accuracy of across-track QuickBird stereo imagery in Shanghai, China, where the terrain relief is very low about 3m but with very high buildings up to 380m. The rational function model (RFM) and the bias-compensated RFM with different parameters are employed to do accuracy analysis with different configurations of ground control points (GCPs). The systematic errors in vendor provided RPCs are revealed and discussed. The results of bias-compensated RFM show that different strategies in terms of the number of GCP and different geometric correction methods should be taken into consideration in order for a better and reasonable positioning accuracy in the three directions. The results also show that the best accuracy of 0.6m in horizontal direction and 0.8m in vertical direction can be acquired by the second-order polynomial model when GCPs are more than 8.
Research on Application of Hall Integrated Sensors
Authors: Li Qing Tian
Published: November 2012

This essay study that in magnetic field and current intensity, measurement, work of electric motor regulating speed applied by Hall integrated sensor shows that in electrical machinery electric circuit control and automatic control system, using Hall integrated sensor has stable properties, high reliability, good temperature stable properties, anti-pollution, without touch dot, etc advantages, comparing with traditional automatic control electric circuit has obvious advantages. It attaches importance to many people in practical use.
Development and Application of Velocity Collection in River Model Based on ZIGBEE
Authors: Chen Hong , Tang Li Mo , Zhang Hui Ming , Wang Hao
Published: November 2012

The paper selected the ZIGBEE technology to build river model wireless network by analogy, and based on mesh network structure of ZIGBEE, integrated the velocity data transmitting apparatus and router, to make the data transfer farther, and the reliability higher, to meet velocity collection need of the large scale river model . Herein a collection system on flow velocity was developed based in Visual Basic, which established the corresponding relationship of the velocity measurement position and actual measurement section and improved automation of data management by the automatic identification on the ZIGBEE number. The practical application revealed that the river model collection system on flow velocity based on the ZIGBEE would meet the needs on the velocity collection with a wider scope, showed more flexible networking and higher reliability, and finally improved the efficiency of the river model experiments.
Research on Verification and Analysis of Micro-Gyroscope Measuring System Based on Dynamic Response
Authors: Sun Hai Gang , Zhou Yong
Published: November 2012

Micro-gyroscope is a typical representative of MEMS development, and relative measuring and testing may acquire some important performance parameters, which facilitate analysis and mastery of the operating characteristics further. However, accuracy and reliability of the results or data from measuring system become the key problem for almost all measuring systems. Based on results produced by micro vision measuring, principles about driving and operating of micro-gyroscope are analyzed, and the theory function between input excitation and vibration response is established. With further study on the whole process of dynamic response analysis, resonant amplitude and frequency are finally defined as two decisive factors influencing the accuracy of micro-gyroscope measuring system. Focusing on experiment design and calculation analysis of the two parameters, accuracy and reliability of the system are well verified, which presents important references for other relative measuring systems of micro-gyroscope.
Testing and Analysis of Actuator Parameter Identification of Heavy Load Stewart Platform
Authors: Ren Rui , Ye Chang Chun , Fan Guo Bin
Published: November 2012

Being relatively new to the field, electromechanical actuators of Stewart platform in vibration control and motion simulation applications lack the knowledge base compared to ones accumulated for the other actuator types, especially when it comes to characterization and system identification. This paper focuses in the modeling of an electromechanical linear actuator to be used in a heavy load six-degrees-of-freedom platform application intended for motion control technology. The paper keeps the main kinematic and dynamic parameters unaffected, ignoring others. After obtaining the structure of model, parameters is derived by system identification. Provides a comparison of output of real system and simplified model by same input signal, the experimental result shows that the method is accurate and have good ability.
Study on Far-Field Scatter of Ship Wake for Micro-Bubbles Based on CST
Authors: Tian Jing , Chen Hang , Qu Xiao Xi
Published: November 2012

Reliable predictions of ship wakes scattering strength are required for laser radar modeling. In this paper, far-field light scatter of wake bubbles is firstly simulated by CST software and used linearly polarized light at a frequency of 563THz (wavelength 532nm,blue light) as probe light; Analyzed the far-filed radar cross section performance of effect factors such like bubbles radius, absorption coefficient in sea water with the method of finite integral of CST. The experiment result shows scatter strength and depolarization characteristics are great variable on conditions of forward and backward scattering, and affected by the bubble radius and seawater absorption coefficient as well, this method all directions of the scatter strength and depolarization characteristics that also can be get in figures. These results provides important basis for subsequent research.
Research on Using WSInSAR to Monitor and Analyze Deformation Wenchuan Earthquake
Authors: Jiang Ting Chen
Published: November 2012

Wide Swath InSAR is known as WSInSAR which can use ScanSAR mode of SAR satellites to get geometrical information of the earth’s surface.ScanSAR’s character is that synthetic aperture time is shared by circumjacent sub_swaths and azimuth resolution is reduced so that large area deformation monitoring for earthquakes is realized.For imaging principle ScanSAR and IM mode are different, process of interferometry also have a lot of dissimilitudes such as coherence,coregistering,correction of atmosphere effects and geoid undulation. In order to make use of ScanSAR data to get wider deformation field,key techniques of ScanSAR interferometry are studied and analyzed in the paper.In the end, 405km×405km deformation fields of Wenchuan earthquake are gained by using ENVISAT ScanSAR data, With the application to ScanSAR interferometry in Wenchuan earthquake, it is significant for earth science research such as large earthquakes and crustal motion.
An Investigation of Interpolation Scheme Based on Indirect Radial Basis Neural Networks
Authors: Sun Hai Tao
Published: November 2012

An indirect radial basis neural network (IRBNN) is proposed for improving the accuracy of the approximated functions. The IRBNN is constructed by new prompted functions generated from the Nth order derivative of the approximated function. In this way, high accuracy derivatives in different order can be obtained, so that more accuracy of the numerical results would be given while the IRBNN is employed for creating approximated functions in numerical methods. Numerical results through applications in elasticity show the effectiveness and accuracy of the IRBNN method.
Molecular Dynamics Simulation of Crack Propagation for Leak Before Break (LBB)
Authors: Yu Hua Jin , Liu Jia , Wang Yue Ying
Published: November 2012

Leak before break(LBB) is an important analysis method for insuring the structure safety and reliability of nuclear reactor. Now LBB technology is widely used in nuclear power plant design. It has a good development in foreign countries, but domestic research is relatively little. The study of crack propagation is core of LBB analysis. In this paper the Molecular dynamics simulations of crack propagation for material of pipes in China Experimental Fast Reactor(CEFR) were studied. The temperature on the flaw in the top of the model has a significant effect, and the position of the flaw would affect the damage form and the damage position of material analyzing the deformation of models. For the same model, temperature has a significant effect on crack propagation process. The analysis of this paper has a guiding role for the LBB analysis of pipes from microcosmic angle.
Study on Nonlinear Vibration of Motor Rotor System
Authors: Zhang Feng Dong , Jia Qi Fen , Zhang Su Xia
Published: November 2012

Based on the actual structure of the motor,the model of rotor system has been established. Horizontal electromagnetic vibration problems of the rotor system are researched under the situation of asynchronous motor running in symmetrical steady state.Calculate the electromagnetic energy and electromagnetic force of the three-phase asynchronous motor (p=4). Study the electromagnetic characteristics and nonlinear electromagnetic vibration problems of the motor rotor system. Taking the gyroscopic effect into account, when analysing the rotor. Calculate the natural frequencies of the system and study double resonances problem caused by the electromagnetic force. Rotary speed, support rigidity all have certain influences upon natural frequencies of the system. Consider these factors for obtaining some regular curves. The first approximate solution and steady response curve of the system were obtained by analysing the double resonances caused by corresponding electromagnetic force.
Set Pair Analysis Method of Containing Target Constraint Mixed Interval Multi-Attribute Decision-Making
Authors: Lü Wen Sheng , Zhang Bin
Published: November 2012

In view of target attribute value for different sector number, moreover, also attaches a target constraint condition kind of mix sector multi-attribute decision making question, this paper presents set pair analysis decision-making method. Firstly this paper puts forward three typical interval type attribute value representation; Then using set pair analysis theory, the interval type attribute value unified convert the correlate form, Finally has given complex decision-making criterion function, which collected Conformity degree criteria and Criteria for membership degree. Through the construction plan changes decision-making example analysis shows that this method is a simple and effective method for solving multiple attribute decision making.
Research on Quality Management System of Wuxi Taihu International Expo Center Project
Authors: Chen Hong Zhuan , Wu Ai Jing , Shen Lei
Published: November 2012

The quality management of construction project is the most critical part of project management. From the multi-agent behavior perspective of quality management of Wuxi Taihu International Expo Center project, this paper analyses the particularity of project quality management, builds the quality management system of the project from the design stage, construction stage, acceptance stage respectively. Then it establishes a fuzzy comprehensive evaluation model of the project's quality management system with an example in construction phase. The article draws a conclusion that Wuxi Taihu international expo center project’s quality managements is general, and gives some useful suggestions to strengthen the quality of the project management from the perspective of the implementation of accountability mechanisms, information construction, as well as environmental coordination.
Effects of the Large-Scale Reclamation Project on Hydro-Dynamic Environment in the Estuary
Authors: Mu Jin Bin , Huang Shi Chang , Lou Hai Feng
Published: November 2012

The hydro-dynamic environment will be changed after reclamation project building. It will affect the navigation, estuary regime, tidal prism, flood controlling, storm surge and so on. Taking the shore reclamation between Oujiang and Feiyunjiang estuary as example, a tidal current mathematical model is used to study the effects of the large-scale reclamation on the hydro-dynamic environment. Based on triangle grid and finite volume method, the shallow flow model is examined by 9 tidal level stations and 9 observed synchronous vertical lines. And the comparison between computed result and measured solution demonstrates very good agreement. After the project building, the high tide level reduces to a certain extent and the flow of front reclamation line reduces by a big margin. But it is a little influence to the core ports of Wenzhou. And the tidal influx through Feiyunjiang Estuary decreases. The result can provide important reference and inspiration for the effects of hydro-dynamic environment due to the large-scale reclamation projects.
ITS - The Key of Traffic Transportation Sustainable Development
Authors: Yuan He Wei , Zhang Jun Ting
Published: November 2012

Present sustainable development is one of the hot topics in the world, and the traffic transportation system is regarded as a subsystem of the social economic system. There is important strategic position in the development of national economy. There are important realistic meanings to study the sustainable development of the transportation system. This paper focused on the analyzing the major traffic problem in sustainable development of the transportation, proposed the intellectual transportation system (ITS) is the key to achieving development of the transportation in China, and discussing how to make use of transportation system of intelligence to achieving sustainable development strategy of the traffic system, some suggestions on developing program and the application of the system architecture in future are presented.
Application of Differential Transform Method to Buckling Problems at Clamped-Clamped Boundary Conditions
Authors: Han Ling Feng , Cheng Kai Qi , Wu Shi Yuan
Published: November 2012

Differential Transform Method (DTM) is a new semi-analytical, semi-numerical algorithm, which transforms differential equations to the form of Taylor series. The method derives an approximate numerical solution based on Taylor series expansion, which is an analytical solution built on polynomial form. Traditional Taylor series method is used for symbolic computation, while Differential Transform Method obtained the solution of the polynomials through itineration calculations. Applying DTM to buckling problems, the critical length of a bar at clamped-clamped boundary is studied. The computational results are compared with analytical solutions and shown excellent agreement between those two algorithms. The method adds a new tool to the fields of computational engineering mechanics. Differential Transform Method is much easier, and more efficient when compared with other computational methods.
Road Traffic Safety Assessment Based on the ADAMS/Car under Snow and Freezing Weather
Authors: Li Tie Qiang , Ma Rong Guo , Wu Fang Chao , Deng Ya Juan
Published: November 2012

In order to assess the traffic safety in snow and freezing weather accurately, determined the difference of vehicle lateral displacement of snow freezing and normal weather conditionsthe as the indicator, vehicle model, road model and vehicle-road coupling model were set up by using software ADAMS/Car. By changing road friction cofficient, road conditions in snow and freezing weather were simulated, step steering were carried out, vehicle lateral displacement of different speed and steering angle were obtained, the difference of vehicle lateral displacement of different speed and steering angle under snow and freezing weather and normal weather conditions were calculated, then the curve of difference of vehicle lateral displacement were generated, traffic safety level division of road under snow and freezing weather were researched based on these curves.
Real-Time Risk Assessment Model of Freeway Traffic in Rain and Fog Weather
Authors: Guo Fang , Gu Wei , Yuan Fang
Published: November 2012

According to the relative position between before-after vehicles or vehicles and obstacles after braking, a separate vehicle risk in different traffic flow states is divided into four levels. To discriminate real-time traffic status on road sections , the concept of critical density is brought in and the risk of four ranks corresponding to the critical speed are anti-calculated in free driving state and car-following state. By comparing critical speed with the average speed on road section, separate vehicle risk is converted into real-time risk of group vehicles, and real-time risk assessment model of highway traffic in rain and fog weather is established. Simulation results show that the low-density traffic flow will bring lager risk than high-density traffic flow in rain and fog etc disastrous weather; To reduce traffic risk of road section, effective measures are speed limit in low-density flow, speed limit in combination with shunt in high-density flow
A Brief Analysis on Technological Expression of Contemporary Architecture
Authors: Liu Ruo Lin , Jin Hong
Published: November 2012

The technological expression of contemporary architecture is developed basing on modernistic architecture. As one of the most influential architectural design methods, it is being paid more and more attention to by contemporary architects. Technological expression has made lots of changes in the design of architectural forms, space and environment. With the rapid development of science, more and more fantastic technology is being applied, which makes it beyond just a method and forms an architectural design theory itself. This paper makes some analysis on the relationship between technological expression and regional culture, ecological concept and natural environment. Since digital information technology is penetrating into architectural designing field, I hope this paper can give some inspiration to architects on their architectural study and practice.
The Research of the Development of Architectural Surface
Authors: Chen Xing , Yang Hao Zhong
Published: November 2012

Architectural surface has changed very much compared with the traditional one in the past, because there are many opportunities for architects to experiment with space and form to express themselves today. What are the characteristics of traditional and modern architectural surface, why the characteristics keep changing all the time and how they are changing are all the main problems to study. In this research, based on analysis of some particular architecture, these questions get some answers to themselves. Through analyzing the relationships of these different characteristics, it is not so difficult to explain the essence of the changing about architectural surface and also make the essence understood deeply. As a result, what is the most valuable in the modern architectural surface gets clearer in the end and it is beneficial for selecting fine directions in the development of architectural surface.
A New Continuous Model of Shape Memory Alloys
Authors: Wang Wei , Yan Shi
Published: November 2012

In this paper a new one-dimensional continuous model was proposed for Shape Memory Alloys (SMAs), which can be applied in the continuous dynamic loading system. After a literature review over the constitutive modeling of SMAs, an improved continuous model considering the influences of the various strain rates of SMAs was developed, which based on a series of experiments. The results of the experiments were used to validate the effectiveness of the proposed model. The constant factors in the model were determined according to the measured experimental data. The parameters in the model were also numerically analyzed and the numerical results matched well with experimental results. The results of the simulation showed that the developed model can effectively represented the relationship between the strain and stress of SMAs under dynamic loading and can be better applied in structure control.
The Modal Analysis and Modeling Study of the Spacecraft Payload Load-Bearing Floor Structure
Authors: Yang Sheng , Ma Chen Chao , Li Guo Feng , Wang Rui Jie
Published: November 2012

As space industry and technology develop, the spacecraft structure systems become increasingly complex and the scales become much larger. Early in the project stage, finite element analysis is required to rapidly and accurately analyze and forecast dynamic characteristics of spacecraft. Based on this, the optimized structural design of spacecraft is then determined. Theoretical analysis done, the effect of both the type and size of shell elements and solid elements on calculation result is discussed during the dynamic analysis process. Shell elements and solid elements are respectively used for the study on load-bearing structure of spacecraft payload instrument. The purpose is, based on meeting the requirement of accuracy, to quickly conduct finite element dynamic analysis of the structure in the early payload structural design and provide a reference for the optimized design of spacecraft structure.
Crucial Torsional Modal Identify on Drive-Train in a Wind Turbine
Authors: Li Hui Xin , Wu Fa Ming , Li Wen , Wang Dian
Published: November 2012

The rotational frequency of large scale wind turbine is very low, so low order modal of drive-train in a horizontal-axis Wind turbine generator system (WTGS) needs special attention to avoid structural resonance. In this paper, with Lagrange’s equation, a three-mass drive-train dynamics of WTGS is modeled and analyzed. After comparing with the results by GHbladed4.1 and SIMPACK, we found that those results show little differences clearly. So the drive-train dynamics above is rational and the accurate analyses are fit to identify the crucial low order torsional modal of drive-train rapidly in WTGS. In addition, the anti-resonance frequency of the gear-train found by frequency response method can be very significant for vibration isolation of drive train in the wind turbine system.
The Modal Analysis of the Rotor of Electric Eddy Current Dynamometer Based on ADAMS
Authors: An Xiang Bi , Li Da Wei , Wang Hu , Wang Long
Published: November 2012

The performance of the rotor of the electric eddy current dynamometer has a great influence on the capability of the dynamometer. The stiffness and damping of the rotor can be obtained by analyzing its motion equation. And the critical speed can be achieved by getting the natural frequency and the vibration through ADAMS based on the theory of flexibility. Based on the machine design handbook, some proofs were provided by the conclusion that the speed of the rotor should be the range of the different critical speed of the modal in order to assure the safety and high efficiency of the dynamometer. Focused on the need for the design of the rotor, this method which solves the difficulties of the intensive calculation in the design and optimization of the dynamometer’s rotor is exact and effective.
Selection of Optimistic Wavelet Base in Running-In Vibration Signal Denoising of Remanufacturing Engine
Authors: An Xiang Bi , Chen Lei , Chen Cheng Fa , Bai Yun Chuan , Yang Chao
Published: November 2012

In the process of running-in vibration signal denoising for remanufacturing engine based on wavelet transform, there are relatively large differences in denoising results when different wavelet bases are used, so the selection of wavelet bases affect the consequent of de-noising processing. On the base of analyzing the characteristics of the commonly used wavelet bases, the paper has compared the impact of the wavelet base on signal denoising. Using SNR(Signal to Noise Ratio) and RMSE(Root Mean Square Error) as criteria, and combined with the characteristics of the running-in vibration signal of the remanufacturing engine, the wavelet base coif4 has been selected as the optimistic base, which has relatively better denoising effect, and improves the SNR and resolution, so it can be used in actual practice.
Research on Condition Monitoring of Bearing Health Using Vibration Data
Authors: Ma Lun , Kang Jian She , Zhao Chun Yu
Published: November 2012

A reliable condition monitoring system is very useful in a wide range of industries to detect the occurrence of incipient defects so as to prevent machinery performance degradation, malfunction and sudden failure. Among the rotating machinery, many mechanical problems are attributed due to bearing failures. So implementing condition monitoring for bearing is critically needed. Considering that most research for condition monitoring only focus on detecting the existing fault, this paper add degradation tendency prognostics into the condition monitoring process. The kernel of bearing condition monitoring method presented in this paper is related to condition features extraction and remaining useful life prediction. The former is realized by the comprehensive vibration analysis for specific fault frequencies. The latter is achieved by adaptive neuron-fuzzy inference system based on extracted degradation signal. For illustration purpose, a bearing case from NASA data repository is used to validate the feasibility of the proposed method. The result indicates that the performance degradation of bearing can be effectively monitored and the predicted remaining useful life with 5.6% relative error can be the important reference for maintenance decision making.
Analysis on Tower Crane under Wind Load by ANSYS
Authors: Gu Yong Qiang , Wang Wen Feng , Guo Shao Dong
Published: November 2012

With high-rise construction increasing in city, it demands more and higher-performance tower cranes. Damages by wind to the tall and towering structures are usually very serious, but these dangers are often hidden.The paper uses the finite element software ANSYS to set up the overall modeling of the TC6010 tower crane which is produced by a company, and carry on the FEM analysis effected by wind based on it . The paper obtains the data of the displacement response of the complete machine after exerting the wind wave, and has the preliminary analysis to the result. The results show that the tower crane is a low-frequency vibrating system and easy to cause the structure resonance, the crane tower may damage in the boom firstly under the action of wind load.
Excitation Source Function of Ground Vibration from Urban Railway Traffic by an Inversion Procedure
Authors: Tao Xia Xin , Zheng Xin , Wang Fu Tong
Published: November 2012

The exciting source of ground vibration from urban rail generally consists two parts, a quasi-static load moving through the railway, and a dynamic interaction between wheel and rail. The latter is caused mainly from the wheel-rail unevenness, and usually described by a power spectral density function, PSD in brief. From the three dimensional point of view, this kind of exciting source can hardly be measured directly. A procedure is proposed to invert the source function from the ground vibrations observed at array. A dynamic coupled train-track-3D ground model is adopted to calculate the vibrations from given PSD. The Micro-Genetic Algorithm including the operators of the tournament selection, the uniform crossover and the re-initialization together with an elitist strategy is schemed to the inversion. The object function is designed as minimum of the sum of residua between calculated and observed ground vibration acceleration levels of 18 center frequencies, at 4 ground points and twice trains. The result shows that the ground vibration acceleration levels calculated from the obtained excitation source function agree with those from the observed data quite well, even for an additional point where the observed data have never been adopted in the inversion process.