Advanced Materials Research Vols. 443-444

Abstract: With the increase of power capacity and short-circuit current, the problem such as big current of short-circuit burn the grounding equipment or over-voltage damage the equipment is becoming more and more common. Based on the problems arising in the design, construction and operation of the grounding equipment, this paper will give an analysis of the corrosion resistance, economics, chemical exothermic welding chemistry characteristics of the copper plated steel. And discussed by combined with engineering examples of 110 Kv jinshan substations。

Abstract: The operation principle of anti-resonance vibration machine was analyzed. The dynamic model of anti-resonance vibration machine with nonlinear spring was established. A new method for solving nonlinear equation based on general finite element method was put forward, the solution was compared with numerical solution, the validity of the solving method was validated. Then the affection of nonlinear and dynamics parameters to the amplitude stabilization was analyzed. the conclusion can be drown as: when the anti-resonance frequency ratio is 1~2,increase the nonlinear of spring can improve the amplitude stabilization, when the anti-resonance ratio is bigger than 3,there is less affection to the amplitude stabilization by nonlinear of spring. The amplitude stabilization can be improved by increasing anti-resonance frequency ratio.

Abstract: Effect of microcapsules on cement composites has been studied. The hydration of cement composite using microcapsules is studied by XRD and thermal techniques, showing that the addition of microcapsules has little affect on the hydration of cement. The pore size distribution and surface area of the cement composite with microcapsule are analyzed, showing a reduction in the pore content of cement composite and makes the pores smaller, which would improve durability and impermeability for designed materials. Damaging on cement and composites containing microcapsules and self-healing of these damagings can be reflected by the changes in their bending strength. When the cracks were generated in the composite, the microcapsules can release adhesive to fill in the space between the crackings, preventing cracking further growth.

Abstract: Along with modern science and technology developing quickly, Remote control technology is in our life. The combination of machine and remote control technology is also bringing infinite fascination and convenience to our life. In the paper, remote control technology is applied to furniture-tea table, and making the tea table mobile according to hominine injunction. The whole figure of tea table is to apply motility element-sphere; the motion and swerve of tea table is to imitate structure of motorcar; in order to space saving, the worktable of tea table is to apply contact design.

Abstract: Based on the experiment platform consisted of DSPACE simulation system and wind power generator, it is introduced in this paper that Pan-Boolean algebra theory is applied to the wind turbine generator blade pitch simulator’s design. A new Pan-Boolean algebra control algorithm of wind turbine pitch simulator is described in this paper for the fist time. The simulation results show that the wind turbine blade pitch simulator can simulate a real wind power blade pitch adjustment process. This blade pitch simulator can be applied for various types of wind power system with blade pitch system. It is important for researches and applications on wind power.

Abstract: This paper introduces a optimize design method of ship unloader. The traditional structure design method is totally by experience and manual calculation, while this method is using the Finite Element Analysis (FEA) method to optimize the structure of ship unloader. Therefore this method may keep the stress and deformation of the structure under permission with less use of materials. First we use the FEA analysis software ANSYS to analyze the static strength and stiffness of grab ship unloader, and get its stress and deformation under different work conditions. Then we evaluate the results and modify the structures to improve the performances of the structure under the complex working conditions. Case study shows this method is effective and efficient in practical use.

Abstract: Navier–Stokes simulation is performed on a canard guided spinning projectile for different attack angles and circumferential position angles of canard over the Mach number range of 1.8–2.2. The computational Magnus moment coefficients of test case are validated with available experimental data of a Secant-Ogive-Cylinder-Boattail (SOCBT) configuration at Mach 3, demonstrating that the method can provide an accurate and viable approach for this problem. The aim of the present study is to provide a detailed understanding of the effects of canard with different circumferential position angles on longitudinal aerodynamic coefficients at three supersonic speeds and various angles of attack. And the results show that normal force coefficients and pitch moment coefficients vary periodically with the circumferential position angles of canard.

Abstract: In this study, we address a rescheduling problem in parallel machine environments under machines failures. To make a balance between efficiency and stability of the reschedules, we consider the total number of tardy jobs as efficiency measure and the number of jobs processed on different machines in the initial and revised schedules as a stability measure. Then a heuristic algorithm which synthesizes beam search (BS) and repair-based constraint satisfaction algorithm is developed. Numerical experiments are processed to evaluate the performance and efficiency of the proposed algorithm. The experimental results show that the proposed algorithm improves the results significantly.

Abstract: An experimental platform of arc pipe was built to measure the corresponding parameters of fouling and the equation of fouling characteristics was built based on principal component analysis and partial least squares, in which there are several input variables such as input and output temperature, wall temperature, flow rate and so on, and there is only one output variables—fouling resistance. In order to compare with the five-input-variables equation, the six-input-variables equation was also built. The prediction results show the model built in this paper is reasonable and feasible.

Abstract: A static interval optimization method for structures was developed. The matrices of structures with interval parameters are given. Combining the interval extension of functions with the perturbation theory of static analysis, the method for interval static analysis of the structure with interval parameters and interval loading was derived. The Interval optimization problem was transformed into a corresponding deterministic one. Because the mid-values and the uncertainties of the interval parameters can be selected as the design variables, more information of the optimization results can be obtained by the present method than that obtained by the deterministic one. The numerical results show that the present method is valid.