Advanced Materials Research Vol. 983

Abstract: In this paper conceptual design study of modified CANDLE burn-up scheme based 400 MWt small long life Pb-Bi Cooled Fast Reactors with natural Uranium as Fuel Cycle Input has been performed. In this study the reactor cores are subdivided into 10 parts with equal volume in the axial directions. The natural uranium is initially put in region 1, after one cycle of 10 years of burn-up it is shifted to region 2 and the region 1 is filled by fresh natural uranium fuel. This concept is basically applied to all regions, i.e. shifted the core of I’th region into I+1 region after the end of 10 years burn-up cycle. For small reactor core, it is important to apply high breeding material, so that high volume fraction of 60% fuel volume fraction nitride fuel is applied. The effective multiplication factor initially at 1.005 but then continuously increases during 10 years of burn-up. The peak power density initially about 307 W/cc but then continuously decreases to 268 at the end of 10 years burn-up cycle. Infinite multiplication factor pattern change, conversion ratio pattern change, and Pu-239 accumulation pattern change shows strong acceleration of plutonium production in the first region which is located near the 10^th region. Maximum discharged burn-up is 31.2% HM.

Abstract: Long-term since, our country concrete building mainly adopts the construction of the traditional mode of production, design and build extensive, poor operation condition, high labor intensity, large building materials loss and building garbage, construction quality is not stable, the whole life cycle of building energy consumption is high, the low degree of industrialization, and the energy conservation, emission reduction and environmental protection policies carried out by the state. Prefabricated buildings are the main characteristics of the sustainable development of construction industry, the integration of the supply chain of the project life cycle, emphasizes the decisive automation and intelligent technology. The emergence of the RFID theory for the research of prefabricated construction provides a new perspective.

Abstract: Aiming at the phenomenon that our country has a large number of disabled due to illness or accident while the corresponding assistive devices is extremely deficient, we have designed a kind of mechanical arm which is intended to be equipped on wheelchair. We adopt articulated mechanical arm with multi-DOF as its mechanical structure, and choose MCU as the main controller; therefore it can make all kinds of flexible action to achieve a variety of functions. In order to improve the accuracy of manipulator, based on experimental results, we optimize the mechanical arm’s structure, improving its strength and stiffness; in order to realize the motion control of the manipulator, the kinematics analysis is conducted, when solving the mechanical arm’s anthropomorphic action problem, we set key points and then optimize the trajectory with linear interpolation, at last achieve anthropomorphic movement.

Abstract: The investigation of the flow characteristics inside the nozzle becomes more and more important because the flow status in the nozzle and fuel injection significantly influence the emission and economy of diesel engines. Due to limited experimental conditions, we can make use of computer simulation, UG models can be used to predict the flow pattern inside the injectors and promote the level of selection and design of injectors. In this investigation, the UG model is calculated by FLUENT software after considering the compressibility and the viscosity of the fuel. By studying, we can predict the distribution of flow field inside the nozzle, analysis the rationality of the design of nozzle, determine the appropriate boundary conditions, mainly includes the nozzle pressure chamber and the needle tip structure, points out that the improvement direction.

Abstract: The existing Universal Test Bed (UTB) is a facility to ground test Turbojet Engines before installation on the aircraft. This work provides a feasibility study to adapt changes to this UTB for the Turbofan Engine. Necessary design modification of existing UTB is performed by applying propulsive and structural analysis for the adaptation of Turbofan engine. Physical measurements of the UTB and the mounts of Turbofan Engine reveal their mutual compatibility. Based on these measurements, six different CAD models are generated in Solid Works^® and analyzed in ANSYS^® Workbench. After grid independence check, validation of the model with applied loads and the boundary conditions was done through comparison of analytical calculations with those of a simplified CAD model. Based on minimum stress vis-à-vis maximum Factor of Safety (FOS), the best design is finally selected through this research.

Abstract: The paper aims at the questions of electromotor selection and mechanism design, which is effectively solved by the virtual prototype technology. Firstly, the three-dimensional model of hybrid machine tool is built by using SolidWorks software. Secondly, the assembled model is channeled into ADAMS/View, and then formed the virtual prototype simulation model with mute-body dynamics. Velocity and driving force curve of each driving shaft is got by analyzing the kinematics and dynamics of the hybrid machine tool. Maximum velocity and maximum driving force each driving shaft can find out by the method of space search. Therefore, the kinematics and dynamics properties of 3-TPS hybrid machine tool is obtained, which provide proof for machine electromotor selection, framework design and control system design. Key words: Hybrid robot; Kinematics; Dynamics; ADAMS; Simulation

Abstract: For the thermal environment and the warming requirement of Vehicle, carry out experiment study on heat storage characteristic of phase change materials (PCM) encapsulated by Spherical stack. heat storage and release experiment process , changing factors such as medium flow rate and melting point which impact on PCM heat transfer characteristics , melting rate and response time have been analyzed. The results show that within the scope of experiment high medium flow rate is conducive to promote PCM melting rate and heat storage. In the experiments process, high melting point of PCM storage heat grade is high, but the low melting point of PCM is more suitable for vehicle motor, batteries in low temperature waste heat recovery. At the same time, multi-melting point PCM storage device with spheres piled encapsulated delamination mixed stowage was better satisfy the different condition of waste heat recovery and utilization than single melting point of PCM.

Abstract: Using the reflection and refraction coefficient of SH wave at the interface of strata, we derived the phase shift of total reflection and refraction SH-wave, The results show that, the phase shift reflection than the phase shift refraction, phase shift of reflection 2 times the phase shift of refraction.

Abstract: In this paper, information fusion theory based on the evidence theory is used in the fault diagnosis field of civil aircraft. Considering the conflict resulted from information fusion in some certain conditions, two improved methods, including Similarity Coefficient and Full Factor are put forward to solve the conflict problems. In a nutshell, the methods are pretty effective and reliable, and the maintenance cost of airlines can be reduced obviously.

Abstract: The characteristic methods involved in underpinning construction are studied in this research. The analysis of the structure is performed with respect to the geotechnical risk and possible retrofitting techniques. In the past several decades, a number of studies mainly focused on base isolation techniques to preserve the structure, but the merits of underpinning technique, geotechnical risk involved, temporary support for safety measures and cost ratio induced were unexpressed. The second generation of research evaluates the measure to reduce ground risk with characterization methods and detailed quality check through construction management system. Current research has pointed out the crucial features of underpinning construction process and its scope in restricted locations and geotechnical perils.