Advanced Materials Research Vols. 143-144

Abstract: The beam shape of concrete transfer floor is completely studied. Firstly, for the system of moulding board and support frame in construction the side pressure and screws are analyzed. The material and structure form of support frame are discussed. The design of support frame uses the method of limited state, and also it analyses the integer stability, part stability, and single stability, and then proposes the load analysis of multi level support frame. To the high-rise building's support frame, the dissertation proposes the approximate calculation based on half-rigidity steel frame. Finally, the dissertation takes ** square for example with the analysis of the support frame of transfer floor and temperature cracks' control. Especially the use of calculation software gets a good effect for the research on the support system of transfer floor. High-rise building transfer floor is the important part of building construction, also is the most difficult part in building construction. The construction technique references intersection application of dynamics, materials, construction design & management etc. subject, it is a complex system project [1]. The key factor is lied support system of transfer floor construction, pouring plan of concrete, maintain concrete at later stage, temperature control technique of concrete [2,3] in high-rise building transfer layers construction. However each area is the new project which transfer floor construction face, in order to keep successful & efficiency to complete the high-rise building transfer layer construction, this requests construction should according to the reality situations, can convenient apply some directly theory system to use, & combine with similar projection experiences, then solve the above problems in quick, efficiency. Under the development trend of high-rise building becoming more and more, how to satisfy the needs of engineering construction, conclude a suite easy, accurate and efficiency technique theory system of high-rise building transfer layer construction, it becomes the reality project in construction technique which need to be solved. From the practice experiences of passed projects, the quality of transfer floor construction references all the project quality directly, and occupies obvious building cost. It is the importance of design consideration plans for whole construction to technique designs carefully, accurate, economy, and the strict control of construction group, and should consider the risk in construction process. So it is necessary to the project study of high-rise building transfer layer construction technique.

Abstract: The milling process of hard-to-cut material high manganese steel ZGMn13 was simulated and experimental studied based on Johnson-Cook material model and shear failure model.The high speed milling processing finite element model has established adopting arbitrary Lagrangian-Euler method (ALE) and the grid adaptive technology,The influence of milling parameters to milling force is analyzed in the high speed milling high manganese steel process. The simulated and experimental results being discussed are matched well. It certifies the finite element model is correct.

Abstract: Based on quasi-stable state heat-transfer control mode, finite difference equation of thermal conductivity in laser welding is deduced. Physical parameter (specific heat) substitutes for phase-changing latent heat, then critical temperature of thermal conductivity welding is determined, so finite difference equation can be solved by MATLAB software. Temperature field distribution is simulated to weldment.Influence of technological parameters such as laser power and welding speed on temperature field are investigated systematically by numerical simulation, these can establish theoretical basis for optimization of technological parameters in laser welding.

Abstract: The strength parameters of granular coarse-grained soil are the critical factor that affects the stability of ultra-high dump. The soil particles of different size have no sorting and random distribution, which leads to the initial fabric of sample grain uncontrolled in the laboratory test of coarse-grained soil, therefore, only relying on the laboratory testing is difficult to obtain the reliable strength parameters of coarse-grained soil. Based on Cellular Automata method, combining the laboratory triaxial tests of coarse-grained soil developed the HHC-CA model which generated the coarse-grained soil samples of different initial fabric of grain to characterize the heterogeneous and random distribution of coarse-grained soil grain group. Then by means of FLAC3D, conducting triaxial numerical simulation tests of coarse-grained soil and discussing the relationship between the gravel contents of samples shear band and samples and internal friction angle. Moreover, the shear strength model for different coarse-grained contents is established. Numerical simulation results indicated that the relationship between internal friction angle of coarse-grained soil and gravel contents of samples shear band were increasing function in the same size grading. According to the increasing of samples gravel contents, the internal friction angle might reduce, but the mean internal friction angle significantly increased with the increment of samples gravel contents.

Abstract: The effect of friction on compression load, effective strain, damage value and maximum principal stress were analyzed by rigid-plastic finite element method during multi-axial compressions (MAC). The results show that with the number of compressions, the maximum compression load increases gradually, the effective strain distributes ringwise and the maximum effective strain is in the center and the minimum at the surface. The damage is inclined to appear at the barreled shape perpendicular to the longitudinal axis. With the increase of friction coefficient, the maximum compression load, strain inhomogeneity, damage value and maximum principal stress increase under the condition of same number of compression. These results indicate that the friction is adverse during MAC. Appropriate measures should be adopted to decrease the effect of frictional force.

Abstract: In order to study the performance of speed feeding, an experimental feeding device was designed. The main design considerations are: Easy to adjust parameters, separate movement control of each device structure, and distribution control for the suction and blowing in the feeding device. The control system is developed on windows PC system. KPCI-884 motion control card is adopted as the I/O interface for the motion control, feeding movement is driven by servo motors, a high-speed solenoid valve is used for gas distribution and system UI is developed in VC++ language. A test run indicates that the system is in good operational condition. In the research, the synchronous control of multiple servo motors in a open-loop state is achieved as well as the detection and control of peripheral signals.

Abstract: The elastic buckling load is physically important in design of the pressure vessel with shell framework because it is actually the critical step in a thin-walled shell configuration that will eventually lead to complete failure. An finite element model of vacuum autoclave was established and the buckling load calculations under the extreme operating conditons have been carried out to obtain the modal deformation condition and the safety factor. The results showed that the structure has a higher safety factor, which indicated that the vacuum autoclave design can meet the working conditon requirements.

Abstract: With the rapid development of the “Internet of Things” and large-scale area management, device collaboration has developed to the stage of large-scale device collaboration. Aiming at the large-scale, dynamics and real-time of the large-scale device collaboration system, in order to ensure the performance of the large-scale device collaboration system, a Quality of Service(QoS) model of large-scale device collaboration is proposed, which contains device QoS model, composite QoS model and QoS relation model. Based on the model, an algorithm of the resource selection in large-scale device collaboration system is presented. Finally, the result of simulation experiments on the large-scale device collaboration prototype system shows that the method can satisfy the performance requirements of the large-scale device collaboration system.

Abstract: For integer programming, there exist some difficulties and problems for the direct applications of population migration algorithm (PMA) due to the variables belonging to the set of integers. In this paper, a novel PMA is proposed for integer programming which evolves on the set of integer space. Several functions and cutting stock problem simulation results show that the proposed algorithm is significantly superior to other algorithms.

Abstract: The modeling and simulation of large-scale Device Collaboration systems is an important issue for seamless integration and collaboration of distributed device integration. Based on the advantage of PI-Calculus in modeling concurrent and dynamic systems, a method concentrating on the modeling of large-scale Device Collaboration system is presented. Firstly, it transforms device behaviors and interactions into PI-Calculus processes. Secondly, weak dissimulation of multiple internal control flows is defined through the application of behavior equivalent theory of PI-Calculus. Following that, external behavior equivalence of system dynamic ontology is discussed. With the help of operational and transitional semantics and a formal deduction, our method can discover system problems in design stage, thus improving architecture correctness and execution stability of Device Collaboration systems.