bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on CO2 Intensity Reduction Allocation of Construction Industry in East China
Authors: Mao Yi Hua , Shao Jin , Li Yang
Published: June 2014

Our Government Made a Solemn Promise, which is our CO2 Emission of per-Unit GDP will be Reduced by 40%~45% in 2020 than that in 2005. with High Energy Consumption, Construction Industry Faces the Problem of how to Allocate the Right of CO2 Emission Reasonably for this Target. the Paper Takes the Construction Industry of Six Provinces and One City Located in East China as Objects of Study, Constructing a CO2 Emission Allocation Model Based on Average Total Profits, Historical Accumulated CO2 Emission and Energy Consumption per-Unit Industrial Added Value in Construction of Base Year. Meanwhile, in the Basis of Different Weight Coefficient of Three Indices, there Exists Four Preferring Cases of Equally Weighting, Capacity, Responsibly and Potential, Consequently, Four Groups of the CO2 Intensity Reduction Burden Statistics from Construction Industry of Regions in East China were Obtained, with Corresponding Analysis and Policy Recommendations such as Establishing Carbon Trading Mechanism to Coordinate the Efforts of all Quarters and Balance the Relationship between Environment and Development.
Monitoring System Construction of Autonomous Learning for College English Based on IT
Authors: Wang Kun , Yang Yi
Published: June 2014

This paper aims to explore the construction of monitoring system of autonomous learning for college English. Dynamic development of autonomous learning was explained briefly. It also discussed connotation and features of the monitoring of autonomous learning. Finally, the monitoring system of autonomous learning was created after analyzing the current situation of students’ autonomous learning activities. It points out that interaction between inner and external monitoring system is beneficial to the progress for English learners; Joint efforts of all of the elements in the system contribute to the efficiency of college English teaching.
Research on the College Students’ Physique Test Based on Artificial Neural Network and Support Vector Machines Approach
Authors: Liu Han Sheng
Published: June 2014

In recent years, China’s college students’ physique presents trend of declining. In the colleges and universities health test management, it produces the problems of only paying high attention to the test and evaluation but neglects the link of feedback and improvement. Based on artificial neural network (ANN) and support vector machines (SVM) approach, this paper makes use of the principle component analysis to conduct discussion on China's college students’ physique health test management mechanism design so as to further perfect current procedure of China's college students’ physique health test work, improve the quality of management work, improve the college students’ physique and truly reach the target for the college students’ overall development.
The Analysis of Database Management Curriculum Reform Based on Working Process
Authors: Hua Min Min
Published: June 2014

Database management curriculum is a very functional course in current education. How to improve the teaching efficiency, bring up more professional talented graduate, and reform the curriculum system is the issue teachers should think about positively. The paper will analyze this problem in following areas: curriculum reform, course content, teaching methods and practical training.
The Integration of Information Technology in College English Courses
Authors: Wang Kun , Yang Yi
Published: June 2014

This paper explores the integration of Information Technology in college English courses based on empirical research. A questionnaire about the current situation of educational technology training was conducted in three universities of Changchun City in China with 200 subjects selected. After analyzing the figures obtained, the paper deduces the conclusion that three ways contribute to the integration. The first step is to improve gradually the college English teachers’ educational technology training which proves to be necessary; Secondly, the Blended Learning Model is the key to the integration of Information Technology in extensive reading courses; Last but not least, computer software such as CAVOCA and Webquest is more effective in the course of listening and speaking.
Gannan Native Products Bamboo Packaging Design Research
Authors: Zhang Yue , Huang Jin Fa , Cheng Jin Xia
Published: June 2014

Gannan has a variety of native products, and rich in bamboo resources, the use of native bamboo packaging has a unique advantage. Through the analysis of Gannan native products, from the processing content of bamboo, such as raw bamboo materials, auxiliary bamboo materials, linear materials, panel-shaped materials and composite bamboo materials, explored the use of packaging design in native products, and further to explore the regional characteristic packaging with bamboo-based, proposed Gannan cultural packaging design expression such as pattern decoration, texts and colors, created a suitable market needs low-carbon and green packaging products, which characteristic in culture and region.
Innovative Design for Autogenous Medium Cyclone Based on TRIZ
Authors: Chen Yan Jie
Published: June 2014

In order to solve the issues of the separation of the high-density mineral, TRIZ method of technical contradiction inventive principles was utilized to provide ideas to design a new-type dense medium separation equipment. The technical contradiction of the separation of high-density mineral by Dense medium separation technology was described by a pair of general engineering parameters, and the innovative principles were obtained by the technology of contradiction matrix. The concrete implementations of these innovation theories were carried, Combing with the actual situation of the separation. And a new-type Autogenous medium cyclone is developed which shall be more suitable for the separation of the high-density mineral.
Study on Prototype of Upper Apparel for Young Man Based on Human Anthropometrics
Authors: Cui Li Na
Published: June 2014

This research carries on the anthropometric measurement to young males university students through human scanner of three-dimension, this research also utilizes SPSS software to withdraw measurements which prototype of upper apparel needs, and finally prototype of upper apparel for young male is designed.
Ontology Enabling Information and Knowledge Modeling for Product Design
Authors: Li Ai Min , Kou Fa Rong , Niu Qin Yu , Tian Hai Bo
Published: June 2014

Product design and development becomes increasingly knowledge-intensive and collaborative. It is very difficult to meet currently imperious needs for the traditional design mode, knowledge managing methods and the geometry-centric application tool. Designers require more generic knowledge of design and design process and more intelligent system. It establishes the FBPSS framework system supporting modeling of product function, behavior, principle, state and structure. Based on this FBPSS framework system, ontology-based product design system is developed through design knowledge repositories.
The Application of Paper Materials in Children Furniture
Authors: Bai Wan Dong , Xu Jia , Zhang Jun Zi
Published: June 2014

Better security and environmental performance are manifested in the use of paper materials on children furniture; Paper materials are of excellent features in portability, convenience, affordability, air permeability and texture;Also introduces the craft process of paper materials in making children furniture, and illustrates the application of paper materials according to the children’s experience.
Finite Element Analysis of Spontaneous Burst of PV Modules during Encapsulation
Authors: Zuo Yan , Zhang Zhi , Wang Tao
Published: June 2014

In this paper, the experimental research and the finite element analysis are carried out to investigate the spontaneous burst phenomenon of the tempered glasses in the lamination process of the PV modules. The simulation and the relevant analysis demonstrate that the spontaneous burst of the tempered glasses of the PV modules in the lamination process is closely associated with the toughening quality and the camber or bending of the glass. It is revealed by the simulation and experiments that the application of the unqualified toughened and camber or bending glasses is one of the main reasons of the spontaneous burst phenomenon in the lamination process of the PV modules.
Development of Naval Ship Synthesis Model in Concept Design
Authors: Hou Yuan Hang , Zhang Jia Ning , Zhen Chun Bo
Published: June 2014

Naval ship concept design is required not only accurately evaluating the feasibility of projects, but also optimize the technology indexes based on certain algorithm. That means at the foundation of appropriate technology indexes, the cost and risk can be optimized to obtain the preliminary overall project, which can be the design baseline for the subsequent design. The establishing and application pattern of naval ship synthesis model will be discussed in this paper firstly, and overview the development of ship synthesis model for about half the century. Some achievements will be introduced then, which included the key technology indexes, that aiming at the technology supports to the naval ship projects design work in domestic.
An Improved Real Time AR Method for Double Vessel Motion Prediction
Authors: Yang Qiang , Wu Chao , Zou Jin , Chen Hong Sen
Published: June 2014

It is significant and valuable to predict the motion of ships in the underway replenishment statement. Thispaper proposes a new Double ships autoregressive-multiple method ( DARm ),which can determine the orders and parameters of model in areal-time. Meanwhile, the hydrodynamic interactions between the ships has beentaken into consideration and be reflected in the method. Then the method is applied to forecast ships’ roll attitudesin different speed. The simulative results of autoregressive- multiple method show the validity and veracity.
The Research and Application on Optimization Design of Lifting Mechanism - The Hydraulic Cylinder Structure Design
Authors: Xie Li , Sun Qi
Published: June 2014

As general mechanic designing methods take long design cycle and consume many resources, though it could find a good design, it could not get the optimal one.Optimization design is the fruit of the combination of optimization mathematical method and modern computer technology, which enables to get the optimal parameters under various constrains, so that the optimal value could be achieved. Optimization design is a method to ensure better usability, lower cost and reducing weight and volume when normally use it. This method can also shorten the design cycle and enhance the design efficiency.
Research on Remaining Driving Range Estimation of Electric Vehicle Based on Dynamic Working Condition
Authors: Du Chang Qing , Du Gang , Tan Ke Cheng , Liu Yong Shan
Published: June 2014

Aimed at estimating the remaining driving range of electric vehicle (EV) on dynamic working condition and exploring the influences on remaining driving range estimation, combined GT-Drive and Matlab, EV simulation model and remaining driving range estimation model have established. Based on UDDS, compared simulation results with estimation results of remaining driving range, the influences on remaining driving range estimation have been discovered, then a optimization scheme is put forward. With the method of corrected parameter, the error of initial estimation value is reduced; when braking energy recovery module is added, EV simulation model is optimized. The results of test indicates that the optimized model has realized to accurately estimate the remaining driving range, meets the requirements of the expected estimation accuracy.
Full Vehicle Handling Prediction and Correlation
Authors: Zhang Xiao Long , Guo Rong
Published: June 2014

Accurate full vehicle handling prediction can be used to evaluate the vehicle dynamic performance. This paper presents the prediction and correlation of full vehicle handling with ADAMS/Car. After building the initial model, major flexible component, steering friction and damping was introduced to optimize the model that makes the model much more accurate. The model will be used to run four major vehicle handling events; the predicted results are compared with measured data. The correlation includes time history of steering wheel angle, steering torque, lateral acceleration, side slip angle, roll, yaw etc. It also includes the derivates such as understeer gradients, steering gradients, side slip gradients, roll gradients etc. It is shown that good correlations are obtained in handling;
Engineering Kinematic Theory of Ground Contact Pressure in the Annex to the Hydraulic Port Facilities
Authors: Tyu Dang , Korovkin Vladimir
Published: June 2014

Proposed a variant of the kinematic theory of engineering ground contact pressure . For disclosure of redundancy soil behavior of the load interacting with fencing or foundation used its dimensionless figure of soil deformation , presented as a nonlinear function .Has shown the equations of the intensity of lateral and vertical ground contact pressure on the wall and the foundation for the entire load range. Proposed an engineering reception accounting redistribution of lateral pressure on the wall, and the contact pressure on the foundation through the transformation ofcoefficient of subgrade resistance diagrams. Has shown the practical implementation of the kinematic theory of engineering ground contact pressure in the method of " mirroring " in relation to the thin walls of the wharf and the method of " traveling wave " for the foundations..
Stress Attenuation Mechanism of Foam Core Sandwich Panels Subjected to Close-Range Blast Loading
Authors: Fan Zhi Qiang , Ma Hong Hao , Shen Zhao Wu , Lin Mou Jin
Published: June 2014

A series of experiments have been conducted to investigate the stress wave attenuation mechanism and the response of sandwich panels made of steel face sheets with foam cores under blast loading in close range. Quantitative results including shock wave pressure and face sheet deflection were obtained and the deformation/failure modes of specimens were identified and discussed systematically. Results show that the face sheet deflection was reduced by adopting a higher density core, however, performance of sandwich panels in blast wave attenuation degrade. Cell collapse type of the central region of the foam core is dominated by brittle crushing under close-range blasting loading. All front face sheets produce localized failure at the focal area and global deformation in the peripheral region.
Research on the Cornering Characteristics of Three-Axle Vehicle
Authors: Xu Bo , Cui Sheng Min , Wu Xiang Yu
Published: June 2014

A multi-axle dynamic steering technology was proposed to solve the steering stability and maneuverability problem of heavy vehicle. Two degrees of freedom linear steering-model and motion-equations of three-axle vehicle was established. Taking the zero sideslip angle as the control target and the proportional rear-front wheel angle as control method, we got the angular scale-factor equation and related matrix of the state space and transfer function. The MATLAB software was used to simulate the different steering modes stability steady-state and transient response. The results show that by using proportional control method the sideslip angle can be stabilized near zero and by using multi-axle dynamic steering technology the stability and maneuverability of the vehicle when steering can be improved effectively.
Expansion of Baker Transformation and its Dynamics Characteristics
Authors: Ma Li Hong , Li Jian Kuan , Shen Wen Mei , Qu Jiao
Published: June 2014

This article discusses the ternary Baker transform dynamic characteristics, the ternary Baker transformation is sensitivity to initial value, when the initial value takes different value, the result is that tending to being restrained in the attractor, the periodic orbit, entering the chaotic state. Baker were subsequently extended to the N-ary, the same dynamics and ternary.
Research of Flow-Induced Vibration of Flexible Plate Based on Fluid-Solid Interaction Method
Authors: Xi Ren Qiang , Jiang Xue Dong , He Yun Song
Published: June 2014

This work is concerned with the modelling of the interaction of fluid flow with flexible solid structures. The fluid flow considered is governed by the incompressible Navier-Stokes equations and modelled with stabilised low order velocity-pressure finite elements. The governing equation of fluid movement is described by an arbitrary Lagrangian-Eulerian (ALE) strategy. The structure is represented by means of an appropriate standard finite element formulation. A simple data transfer strategy based on a finite element type interpolation of the interface degrees of freedom guarantees kinematic consistency and equilibrium of the stresses along the interface. The resulting strongly coupled set of non-linear equations is solved by means of a partitioned solution procedure, which is based on the Newton-Raphson methodology and incorporates the full linearization of the overall incremental problem.
Analysis and Optimization of Dismantling Machine Shear Head Based on ANSYS Workbench
Authors: Du Wan Peng , Zhang Yong Jian , Zhou Chen Quan , Zhang Ai Hui , Yu Ji , Liao Ping
Published: June 2014

The object is dismantling machine shear head with 500kN’s maximum shear force. The three-dimensional models, static analysis, topology optimization were done in the ANSYS Workbench. And the goal driven optimization was done which based on topology optimization. The maximum total deformation, maximum equivalent stress and geometry mass were selected as objective parameters and the distance of two connecting holes, diameter of long hole and length of blade as design variables. At last, the optimized structure was checked. The strength and rigidity meet the requirements and the mass decreased.
Kinematics Simulation Based on ADAMS Belt Conveyor Rollers
Authors: Yang Jie , Wang Xue Jun
Published: June 2014

Belt conveyor has the strong adapt ability and it uses widely in convey machinery. Roller is one of the key components in the belt conveyor; it plays an important role in the normal operation of belt conveyor. In order to study the influence factors of roller service life, this paper analyzed the movement of the roller and used Solid edge ST4 and ADAMS software to establish the virtual prototype model of roller and kinematics simulation of the model. This paper concludes the main factors affect the life are the sealing effect, poor alignment of the roller and the alignment of the bearing. Through the analysis of roller can reduce the design errors, improve the processing and installation accuracy mostly at the same time in the production process, it also can reduce the design and process time significantly and lower manufacturing cost and prolong the service life of roller.
On the Bifurcation of Periodic Motion of Rotor Ball Bearing System Considering Five Degrees of Freedom
Authors: Cui Li , Wang Qing Sheng
Published: June 2014

Nonlinear bearing forces of ball bearing under five-dimensional loads are given, and five-DOF dynamic equations of rotor ball bearing system are constructed. Bifurcation of periodic motion of rotor ball bearing system in unbalance-rotating speed and radial clearance-rotating speed parametric domains are studied by use of continuation-shooting algorithm. Results show that the way of bifurcation and stability of period-1 motion vary with radial clearance and unbalance.
Sound Source Identification and Acoustic Contribution Analysis Using Nearfield Acoustic Holography
Authors: Deng Jiang Hua , Dong Jun Hong , Meng Guang De
Published: June 2014

The main goal of the present paper is to provide a method of source identification. Firstly, statistically optimal near-field acoustical holography (SONAH) techniques are applied to locate sound sources with the reflected sound field. In the presence of reflection plane parallel and perpendicular to the source plane, the incoming wave and reflected waves are separated based on the acoustic superposition principle and acoustic mirror image principle to satisfy the condition of the sound sources reconstruction using SONAH. Secondly, contribution of noise source to the special field point is analyzed and noise source ranking of interior panel groups are evaluated based the proposed three step acoustic contribution method. Finally, this method is verified experimentally.
Offshore Marine Ambient Noise Measurement Study Based on Laser Interferometer Hydrophone
Authors: Hua Zhi Li , Li Lei , Zhou Zhong Hai
Published: June 2014

Sound pressure is an important parameter of marine background noise monitoring. A laser interferometric hydrophone is designed based on Michelson interferometry. By tracking compensation method, immunity from interference of the hydrophone is improved. Error analysis shows that the vibrating membrane is the main source of the sound pressure error, which can be eliminated to a certain extent by a vibrating membrane materials selection. Offshore data show that hydrophone pressure measurement of high precision, and with a good frequency response. By comparison with the theoretical model to some extent also verified the accuracy of data. In coastal waters, wind noise and ship radiate noise is the main noise source of marine ambient noise. Here, marine ambient noise spectrum of three wind speed were calculated, and with Kundsen curves were compared. Results show that measured data and Kundsen curve fitting is better. In addition, the measurement of vessel radiation noise is mainly concentrated in frequency range of 350~500Hz.
The Harmonic Response Analysis of Workover Rig Platorm Base on ANSYS Workbench
Authors: Wang Xian Rong , Jin Jia Qi , Li Ya Zhou
Published: June 2014

Normally, the workover rig platform is obtained only low order natural frequency by modal analysis. In order to understand the frequency response of structure dynamic load, we well carry out harmonic response analysis on the operation platform in this paper. On this basis, determine the modal frequency that is greatest effect on dynamic behaviour of the workover rig operation platform structural system. To extract the modal frequency as dynamic optimization goal or state variables.Finally, achieve forecast the possibility of dynamic interference between operation platform and other components.
Research on Dynamic Balance Method of Precision Centrifuge
Authors: Liu Tao , Xu Yong , Mao Bo Yuan
Published: June 2014

Firstly, according to the structure characteristics of precision centrifuge, the mathematical model of its dynamic balancing system was set up, and the dynamic balancing scheme of double test surfaces, double emendation surfaces were established. Then the dynamic balance system controller of precision centrifuge was designed. Simulation results show that the controller designed can completely meet the requirements of precision centrifuge dynamic balance control system.
Study on the Dynamic Characteristics of the Large Diamond Circular Saw Blade
Authors: Zhao Min , Zhang Lin , Wu Bin
Published: June 2014

Large diamond circular saw blade is a plane with large diameters and thin thick, so there are serious vibration problems in the process of sawing stone under the high-speed. By using the force hammer producing incentive experiment method, the effect of the inner and outer diameters to the vibration modal and frequency of diamond circular saw blade are analyzed. Through comparing inner and outer diameter, it can be found that the inner diameter has greater influence on the natural frequency, while the outer diameter has greater influence on the amplitude. The result supplies reliable data for eliminate or reduce resonance damage.
Vibration Control of Erecting System Based on Fuzzy Adaptive PID Controller
Authors: Xie Zheng , Xie Jian , Du Wen Zheng , Huang Ding Jun
Published: June 2014

To reduce the influences of vibration of large erecting system in the process of erecting, this paper firstly built a simulation model, then an erect angle velocity was planned so that it can minimize the velocity at the stage of beginning, multi-stage cylinder stage changing and arriving, thus the velocity at the other stages can be increased . Meanwhile the fuzzy adaptive PID controller was applied to track the erect angle curve. Finally, the simulation validates that the vibration and shock are effectively reduced by this method. Fast and stable erection of the load is realized. Compared with the original PID controller, the fuzzy adaptive PID controller can be proved to have a better control performance.
Research on Modeling Method for Oil-Film Stiffness Calculation of Point Contact Based on EHL
Authors: Li Song Sheng , Shao Juan , Yu Feng , Ling Jie , Chen Bin
Published: June 2014

Internal lubrication condition affects dynamic characteristics of rolling ball bearing in operation.According to the calculating problem of the elastic fluid lubricant film stiffness in point contact zone, the oil-film stiffness calculation model was set up based on the elastohydrodynamic lubrication theory (EHL) ,which considers the oil-film distribution and the pressure characteristic of the whole contact region. The stiffness of the oil-film was obtained from this model and compared with the experiment. The results indicate that the data calculated by the model fit the experiment very well, improving the calculation accuracy of the oil-film stiffness.
Worm and Worm Wheel Kinematics Simulation of a Rail Transport Based on ADAMS
Authors: Tang Zi Yi , Wang Xue Jun
Published: June 2014

Worm and worm gear is widely used in modern mechanical industry, it has a lot of advantages including large transmission ratio, compact structure, strong bearing capacity, stable transmission and self-locking performance etc. However, the kinematics characteristic is very important for the performance of equipment. So this article to the worm as the research object, which of the lifting mechanism in rail transport. First, making 3D modeling by Solid Edge V20, Then put the 3D model into the ADAMS, and start the kinematics simulation about transmission mechanism. This paper mainly simulates the angular velocity and angular acceleration of worm when its working, then comparing the change law of the motion curves, and analysis of the results. It can shorten design cycle, improve the design accuracy, reduce the cost of product development, and also create the conditions for the follow-up mechanism optimization and finite element analysis.
Contact Trace of Internal Meshing Double Circular-Arc Spiral Bevel Gears
Authors: Lin Zheng , Yao Li Gang , Lin Quan
Published: June 2014

The meshing contact analysis of double circular-arc spiral bevel gears for nutation drive is considered. Based on gear meshing theory, the mathematical models and meshing equation of the double circular-arc spiral bevel gears are developed. The contact trace satisfies the tooth surface equations and meshing equation simultaneously, and then the contact trace is solved by using mathematical software. The analysis of tooth surface contact pressure is simulated by finite element analysis software.
Study on the Influence of the Installation Error of Ball Screw Feed System
Authors: Zhang Wei Wei , Chen Hua Ling , Jia Shu Hai , Wang Yong Quan
Published: June 2014

Focusing on the quantitative research on feed system with installation errors, a theoretical analyses model is developed to analyze the influence of parallelism error and coaxiality error of the system. The change law of stress, deformation and contact angle is discussed based on the analysis with hertz contact theory. The theoretical analysis is verified by the simulation with FEM software. The result shows that bias load, deformation of guide and compress variation of the ball decrease as the deviation from bearing for the coaxiality error, while these changes remain small for the first half stroke and dramatically increase later for the parallelism error. The analysis above may be helpful for the installing of the ball screw and for improving the machining accuracy.
Research on Nonlinear Dynamic Characteristics of the Double-Worm Gears Anti-Backlash Drive Mechanism
Authors: Zhao De Hong , Zhou Shuo Jun , Wu Yu Hou , Wang Qing Yuan , Lu Feng
Published: June 2014

This paper puts forward a new type of gear anti-backlash drive mechanism, in view of traditional’ manufacturing is difficult and production cost is high. This mechanism uses the structure of a pair of worm gears which are against each other and double gears to eliminate the back clearance volume. The dynamic model of the mechanism in this paper is established by the method of lumped mass, and the model’s numerical solution is solved by fourth-order Runge-Kutta. Then the nonlinear dynamic characteristics of system are simulated and analyzed. The studies show that this mechanism whose backlash has been eliminated has a good dynamic characteristics, and increasing system’s meshing damping can shorten the vibration attenuation time and improving the average meshing stiffness can reduce vibration amplitude of the system.
Parametric Modeling of Involute Spur Gear Based on AutoCAD
Authors: Guo Xin Lei , Zhao Hong Sheng , Lu Jia Bin
Published: June 2014

This paper, taking the involute spur gear as a research object and using the LISP module embedded in AutoCAD, studies how to realize the drawing of two-dimensional graphics of the involute tooth profile and keyway of spur gear effectively and efficiently. The study, using the commands, such as stretch and Boolean operation of AutoCAD after programming, has realized the parametric modeling. By using this method, one can model them quickly, and lay the foundation of the assemble and analysis for the next step.
Dynamic Analysis of a Spur Geared Rotor-Bearing System with Nonlinear Gear Mesh Stiffness
Authors: Chen Ying Chung , Kang Chung Hao , Choi Siu Tong
Published: June 2014

The gear mesh stiffnesses have been regarded as constants in most previous models of geared rotor-bearing systems. In this paper, a dynamic analysis of a spur geared rotor-bearing system with nonlinear gear mesh stiffness is presented. The nonlinear gear mesh stiffness is accounted for by bending, fillet-foundation and contact deflections of gear teeth. A finite element model of the geared rotor-bearing system is developed, the equations of motion are obtained by applying Lagrange’s equation, and the dynamic responses are computed by using the fourth-order Runge-Kutta numerical method. Numerical results indicate that the proposed gear mesh stiffness provides a realistic dynamic response for spur geared rotor-bearing system.
The Deformation Characteristics of Hydro-Forming of Differential Gear Box for Automobile
Authors: Huang Wen , Yu Hai Bo , Lu Hong , Qin Si Ji
Published: June 2014

The hydroforming process of differential gear box for automobile under axial compressive load and internal bulging pressure was simulated and the load paths were optimized. The hydroforming process is divided into two steps. The deformation under different load paths was investigated using dynamic explicit finite element method. The distribution of equivalent strain and thickness was investigated as well. The simulation results show that the forming path for the first step is optimal when internal pressure changes linearly from 37MPa to 65MPa with the axial displacement.
Spanwise Penetration Depth with Turbine Disk Inclination
Authors: Yuan Zhen Wei , Zhang Jun , Zhu Dong Shuai
Published: June 2014

Spanwise penetration depth as a new correlating parameter was introduced in the cascade profile loss correlation of a new loss breakdown scheme for turbine cascade reported in the literature. For the case of an inclined turbine disk, when a turbine disk is inclined to its design position, the blade incidence or inlet flow angle varies with the position of blade on the turbine disk circumference, leading to the variation of spanwise penetration depth. To examine the influences of turbine disk inclination on the spanwise penetration depth, new correlations were developed and numerical simulations were performed with MATLAB. The role that turbine disk inclination plays in the spanwise penetration depth is manifested in a modified inlet flow angle expression on account of turbine disk inclination. It is concluded that the turbine disk inclination has considerable influences on the spanwise penetration depth in the turbine cascade passage.
Analysis and Simulation of Virtual Dense Storage System
Authors: Xue Yun Na , Shen Min De
Published: June 2014

To avoid the disadvantages of the traditional storage system, the dense storage system is presented. In the dense storage system, many cargo boxes can be stored on the shelf depth direction, and the shuttle car is adopted as the transport equipment. Based on Flexsim software, through the simulation analysis, the results showed that the efficiency of the intensive storage system decreases, but the storage area and equipment costs are greatly reduced.
Effect of Different Airfoils on Performance of Axial Fan
Authors: Zhou Bang Lun , Yuan Jian Ping , He Zhi Xia , Hong Feng
Published: June 2014

Airfoil has great influence on the performance of axial fan. In order to study performance of axial fan. Four kinds of airfoils have been applied to optimize the impeller of axial fan. The 3D internal flows of the axial fan under different operating conditions were simulated based on a steady numerical method in ANSYS CFX 14.5. The results show that the curve of total pressure of the fan with LS airfoil blades is slightly steeper, and that of the fan with CLARK-Y(C=11.7%) (C is the blade thickness ratio) airfoil blades is relatively flat. The total pressure of the axial fan with CLARK-Y(C=11.7%) blades is highest among others. While achieving the highest efficiency in all the operating conditions except the lowest flow rate. Moreover, the blades loading of the CLARK-Y(C=11.7%) airfoil blades fan is entirely more uniform than that in others. The turbulent kinetic energy distribution on the leading edge of blades shows that the axial fan with CLARK-Y(C=11.7%) airfoil blades fan can improve the turbulent kinetic energy effectively.
Experimental Study of Cavitating Flow inside Enlarged Transparent Injector Nozzles and its Effect on Spray
Authors: Chen Yu Hang , He Zhi Xia , Chen Xiao Bin , Jiang Ding
Published: June 2014

The complicated cavitating flow inside diesel nozzles has long been concentrated on. Based on the visualization experimental system, cavitating flow characteristic inside transparent nozzles with different length-diameter ratios was investigated in this paper. Experimental results showed that the cavitation is easier to occur for diesel than for biodiesel, and the longer the length of the orifice is, the harder the cavitation and hydraulic flip phenomenon to occur. Discharge coefficient of diesel was higher than that of biodiesel in single-phase flow region, while got much smaller than that of biodiesel in the cavitating flow and hydraulic flip regions.The spray cone angle of diesel was larger than biodiesel in cavitating flow regime, and got much smaller with the increasing of the length-diameter ratios under the same level of injection pressure in diesel and biodiesel fuels.
Numerical Simulation of the Hydrodynamic Cavitation of the Impinging Streams Mixer
Authors: Wang Fen , He Zhi Xia , Ma Yue , Li Chang Si
Published: June 2014

The impinging streams mixer is a new type micromixer. The cavitation phenomenon occurring in the mixers with T-shaped impinging streams (TS), conical impinging streams (CIS), vortex streams(VS) were investigated, respectively. The distribution of flow field in the mixer was simulated and calculated by commercial software Fluent 6.2.1. The results showed that under the same working conditions, a more obvious hydrodynamic cavitation may occur in the CIS type impinging stream than that in the CIS type or the VS type, and the vortex flow lead to an extension of the material residence time in the mixer. The distribution of turbulent kinetic energy and gas holdup were obtained by numerical simulating hydrodynamic cavitation under different entrance pressure conditions. It is showed that when the outlet pressure keeps a constant value, hydrodynamic cavitation can be enhanced by increasing the entrance pressure. The above research can be contributed to the producing of biodiesel and the solving of the key technical problem of oil and alcohol heterogeneous mixing.
Research on Unsteady Pressure Fluctuation within the whole Flow Passage of a Fire Turbopump
Authors: Wang Li Jing , Yuan Ye , Xue Lin
Published: June 2014

The unsteady pressure fluctuation is one of the major factors affecting the operational stability of a fire turbopump. Based on the experimental operation conditions of the turbopump, the inner unsteady flow field in the turbopump is simulated by computational fluid dynamics (CFD), and the pressure fluctuations at the zones near the turbine suction chamber, the turbine impeller inlet, the turbine outlet and the interface of pump impeller/volute are investigated by time-frequency analysis methods. The results show that high pressure fluctuation can be observed near the interface of turbine impeller-guide vane and the interface of pump impeller–volute caused by rotor-stator interaction (RSI). Moreover, turbine pressure fluctuation frequencies are identified as the 14 times and 26 times of rotating frequency and the fluctuant amplitude depends on the guide vane inlet angle; whereas, pump pressure fluctuation frequencies are observed at the times of the blade passing frequency (BPF), while the frequencies higher than 10 times of BPF have less effect on the pump vibrations. The results of unsteady pressure pulsation could be used to guide the optimum design of the fire turbopump, which is in favor of obtaining more stable performance of the turbopump.
Study on Internal Parameters of Cage-Type Trim of Multi-Stage Depressurization Steam Trap
Authors: Li Shu Xun , Ding Qiang Wei , Xu Xiao Gang , Fan Yi Lin
Published: June 2014

Aiming at the lack of research for key parameters of the cage-type trim of sleeve-type steam trap, the numerical simulation calculation was carried out for the cavitation flow in valve, the influences of orifice types, orifice diameter, guide sleeve types on cavitation were researched. The distribution of pressure, velocity and vapor volume fraction on flow field were got for different sleeve parameters. The results show that using multi-stage sleeve, and decreasing the orifice diameter properly can suppress the occurrence and development of cavitation, and the double orifices structure sleeve is more favorable to anti-cavitation, the gap sleeve is superior to the guide sleeve. It can provide certain references for the research of anti-cavitation and multi-stage depressurization valves.
Study on Nonlinear Damping Properties of Hydro-Pneumatic Suspension System for XP302-Pneumatic Tyred Roller
Authors: Xing Bang Sheng , Wang Ning Ning , Xu Le
Published: June 2014

The nonlinear stiffness and damping properties of the hydro-pneumatic suspension system are introduced, and the nonlinear mathematical model of it is established. Using MATLAB 2009b to establish the computer simulation program and draw out the nonlinear stiffness curve and damping properties curve of the hydro-pneumatic suspension system. Then, researching the influences of related parameters' changes on the nonlinear stiffness and damping properties of the hydro-pneumatic suspension system. The simulation of vehicle dynamic performance research's foundation is provided.
Aerodynamic Analysis of the Static Port’s Step Height
Authors: Yang Hui , Yang Shi Pu
Published: June 2014

To determine the static port’s installation accuracy requirement, the relationship between the step height and the static source error are studied by numerical simulation. It is found that the static pressure is higher than the pressure in far field when the step height is small, which is opposite when the step height is great. And the relative static source error is less than 0.18% when step height is within 0mm to 0.15mm. Besides, the maximum relative error caused by the uncertainty of the step height is found less than 0.06% if the installation accuracy of the static port is 0mm~0.1mm. By comparing the maximum static source error specified by airworthiness regulations, the static port’s installation accuracy requirement of 0.1mm is found to be appropriate.
Effect of T-Shaped Micro-Channel Structure Dimension on Formation of Micro-Liquid-Columns Formed by Vertical-Shear-Flow
Authors: Wang Zhi Xin , Li Zhe , Cai Heng Zhi , Zhang Ya Jun , Zhuang Jian
Published: June 2014

Effects of T-shaped micro-channel structure sizes on the formation of micro-liquid column formed by vertical-shear-flow were studied. The method of CFD based on VOF (Volume of Fluid) model was used in the computation. H2O and C5H3 were used as continuous-phase and as dispersed-phase. Interface-tracking method was used to get data of the two phases. The size parameters include crossing angle (∠β), width ratio of vertical channel and main channel (W2/W1), depth ratio of vertical channel and main channel (D2/D1), depth-width ratio of main channel (D1/W1). The above parameters affect the forming time of micro-liquid columns, the order of importance is D2/D1,∠β, D1/W1, W2/W1; And for the length, the order is∠β, D2/D1, D1/W1, W2/W1. For the shortest forming time, the optimized parameters of ∠β, D2/D1, D1/W1 and W2/W1 are 90°, 1.00, 1.00 and 1.60. To get the shortest micro-liquid columns, the optimized parameters of ∠β, D2/D1, D1/W1 and W2/W1 are 60°, 1.00, 1.00 and 1.60.
TERRASAR-X DINSAR FOR LAND DEFORMATION DETECTION IN JAKARTA URBAN AREA, INDONESIA
Authors: Putri Ratih Fitria , Bayuaji Luhur , Sri Sumantyo Josaphat Tetuko , Kuze Hiroaki
Published: June 2014

The X-band synthetic aperture radar (SAR) onboard the TerraSAR-X satellite is useful for land subsidence detection and monitoring, since the sensor provides high spatial resolution data with a relatively short repetition cycle of 11 days. Jakarta is one of the largest cities in the world with population more 10 million as of 2011. The area has been suffering from significant effects of land subsidence that causes damages to public facilities, buildings, and other public and private properties. In this work, we exploit the capability of TerraSAR-X for detecting land subsidence in Jakarta during a four year period between 2010 and 2013 using differential interferometry SAR (DInSAR) technique. Our analysis reveals that two northern areas in the city exhibit clear indications of land subsidence varying from 8.5 to 17.5 cm/year, mostly caused by intensive human activities in addition to the vulnerability due to geological structures of these areas.
Ethical issues that confront nurses in private hospitals in the Western Cape Metropolitan area
Authors: Stellenberg Ethelwynn L. , Dorse Alta J.
Published: June 2014

Background: Nurses are faced daily with a variety of ethical issues which could be as a result of budget cuts, target setting, the shortage of nurses and expertise.Objectives: The objectives of the study were to identify ethical issues related to patient care, to describe ethical issues related to patient diversity, rights and human dignity. To describe ethical issues related to caring in nursing and to the workplace environment.Method: A quantitative explorative descriptive research design was applied. A stratified sample of (n = 142/5%) was drawn from all nurses and caregivers (N = 2990) working in a selected group of eight private hospitals. Self-administered questionnaires were used to collect the data. Statistical tests were applied to determine statistical relationships between variables.Results: Results included (95%) of respondents provided safe and committed care to their patients, (99%) loved to care for their patients and (93%) believed in the Nurses’ Pledge of Service. Fifty percent (50%) of the respondents indicated verbal abuse from patients and only (59%) experienced openness and transparency in the work environment. Analysis further identified that the caregivers did not respect the noble tradition of the profession and experienced the most verbal abuse.Conclusion: This study has identified ethical issues which may give rise to conflict within the workplace environment if not adequately addressed by management. The study further showed that the use of caregivers not regulated in nursing practice may pose as a threat to the safety of the patient.
Cognitive-behavioural therapy effects on employment-related outcomes for individuals with mental illness: A systematic review
Authors: Minjoo Kim , Mpofu Elias , Brock Kaye , Millington Michael , Athanasou James
Published: June 2014

Orientation: To identify the effects of interventions in cognitive-behaviour therapy (CBT) on employment-related outcomes world-wide for individuals with mental illness.Research purpose: A search of the relevant literature was conducted through PsychInfo, Medline, Scopus and Google Scholar™, covering the period between 1995 and August 2011. The methodological quality of included studies was assessed using the criteria from Evidence Based Library and Information Practice (EBLIP). Eleven studies met the inclusion criteria.Motivation for the study: Evidence is needed on best practices to support work participation by people with mental illness. Effective cognitive-behavioural intervention might enhance their personal control over participation in employment aside from systemic or policy-oriented interventions.Research approach, design and method: A scoping review was done to map trends in the evidence for CBT as an intervention to support employment participation by people with mental illness. A scoping review is exploratory, the evidence of which lays the basis for subsequent studies. The methodological quality of included studies was assessed using the EBLIP Critical Appraisal Checklist.Main findings: Cognitive-behaviour therapy was an effective intervention approach for better work productivity, longer work hours, higher re-employment rate and enhanced mental health for individuals with mental illness.Practical/managerial implications: Cognitive-behaviour therapy is a promising strategy for industrial and organisational psychologists dealing with people who have a mental illness. It enhances employment and maintains work adjustment. Additional clinical trials in diverse populations and contexts will further establish its efficacy.Contribution/value-add: This scoping review aggregated the preliminary evidence for the efficacy of cognitive-behaviour therapy as a work-participation intervention for people with mental illness.
Towards a national security psychology in the South African National Defence Force
Authors: Martin Jarred
Published: June 2014

No asbtract available.