Applied Mechanics and Materials Vols. 246-247

Abstract: This paper first analyzes design and manufacture characteristics of automobile generator, and then the management condition and product design of small automobile generator manufacturers. Based on this information, we research the integration and application of the production and management information system for automobile generator used in small manufacturers including the network structure of whole project design system, research and developing content, key technology and major creation proposal.

Abstract: This paper took one 330MW unit boiler in one power plant as an example, then doing some research about the boiler system energy change through doing exergy analysis. After this, the exergy flow equation was established, the energy transfer, utilize and loss of the thermal power plant production was revealed, the exergy efficiency of the boiler was defined. So the paper can provide a basis for energy utilization of power plant.

Abstract: The experimental and theoretical study on the rapid explosive dispersal process model of a thermobaric explosive has been carried out. Detonation of a thermobaric explosive generates a blast wave followed by a complex supersonic gas-solid fluid, which the additive fuel, aluminum particles, in some cases, might catch up to and penetrate the leading shock front. The developing history of the explosive fireball is analyzed and the complex physical mechanisms are primarily determined, and the influence of the critical parameters such as the mass ratio of explosive and fuels and the fuel properties to dispersal radius and maximum dispersal velocity are estimated. The theoretical expression of maximum dispersal velocity of solid aluminum fuels was deduced and the mathematic expression of explosive dispersal radius with time was deduced. Overall, an excellent agreement is reached between the experimental and theoretical model results.

Abstract: This paper uses infrared high-speed camera the QUALISYS-MCU500 infrared monitoring of long-range system, when football players kicked out football, we make the soccer unsteady dynamic analysis of nonlinear algebraic modeling, the modeling accuracy, the adjustment factor number, and then give the coefficient matrix, and finally calculate the law of motion, according to the modeling results, we calculate the curve giving the football spins.

Abstract: In the minimum electromagnetism coupling model of interaction between photon and electron, we present a effective and precise calculation on the differential cross section of Compton scattering with the help of the electron renormalized chain propagator. By comparing the result of the differential cross section of the Compton scattering with electron propagator at the tree level and the one loop level, respectively, we find that the correction of the chain diagram is better than the one-loop diagram to the differential cross section in the 10^-3 order.

Abstract: The performance of air interlayer on attenuating the explosion shock wave is investigated by using the material point method. To verify the numerical method, the detonation process in one water medium only was considered. The numerical results were in good agreement with the data calculated by the empirical formula and demonstrated the effectiveness of material point method. A series of two-dimensional simulations of underwater explosion with the air interlayer were studied. The research shows that the air interlayer can attenuate the underwater explosion shock wave effectually.

Abstract: The span overpass anti-flutter stability has been the focus of our study. Large span overpass in the running state of the wind and the load in line with the stability has been the concern and attention of the engineering and technical personnel. This paper establishes a flexible dynamics model through the use of long-span overpass line finite element analysis. Moreover, after the flutter stability of qualitative terms, we have a number of effective methods and measures to increase the flutter stability of the large-span overpass.

Abstract: To investigate the aerodynamic performance of a flexible flapping wing aircraft, a flapping-wing system were design and an experiment were set up to measure the unsteady aerodynamic forces of the flapping motion. The thrust formula and resistance formula described aerodynamic forces. The lift and thrust of this mechanism were measured for different angles of attack and wind velocities. Results indicate that the thrust increases with the flapping frequency and the lift increase with the wind velocity, while the lift coefficient decreases while the velocity increases. It is realized that the wing’s transformation which imitated birds leads less resistance when flapping upward which impacts the aerodynamic lift generation and the bionic winglet leads to a change in the leading edge vortex and span-wise flow structures, which decrease the airflow’s backward pull. Models were introduced which were used in the design process and show its aerodynamic performance. The flexible flapping wing vehicle is still an open research area.

Abstract: Full scaled simplified model and production vehicle were applied to make a research on the local and global flow characteristics. Two different conditions including stationary and rotation were employed in computational simulation by steady RNS Navier-Stokes calculation. Further, detailed analysis on flow, surface pressure coefficient, drag coefficient and lift coefficient affected by rotating wheel figure out that rotating wheel has a significant influence on the flow around wheel and vehicle. Pressure difference, drag coefficient and lift coefficient are decreased by rotation, which improve aerodynamic performance.

Abstract: To start from the investment characteristics of wind power projects, account for wind power projects in the life-cycle costs and project income, decision analysis and application of cost-effectiveness of wind power projects, the final project decision makers come to the scientific and rational decision-making program. To carry out the analysis of the case by cost-effectiveness, then come to a scientific and rational conclusion.