Applied Mechanics and Materials Vol. 686

Abstract: According to the characteristics of a curve on the surface, the correlation between the placement feasibility for fiber tow and the surface shape of a composite component, width of the fiber tows is analyzed. The placement process route under the condition of fiber tow ultimate deformation is calculated. In addition, based on fiber loading orientation in the designed placement layers, the best mechanical route is calculated. Through the given proportionality coefficient of geodesic arc radii under the constrain conditions of the mechanics and fiber tow deformability on the present route point, a simple modeling approach is proposed to obtain the actual model of the route with the goal of satisfying the best mechanical route orientation . Take the placement of a free form surface as an example to verify the approach, with the result of indicating its reasonableness.

Abstract: The content of this subject research is to conduct optimization for engine mounting system, and through optimization, it can make the vibration between engine and vehicle body achieve a minimum, using Adams software for simulation. It studies the isolation vibration of the engine mounting system and conducts goal optimization for fixed frequency. This paper uses two methods for optimization. One is to use the rational allocation of fixed frequency to optimize the fixed frequency, and the other is to use energy decoupling method to optimize the fixed frequency. It uses Adams software for simulation of the optimized fixed frequency and conducts comparison of simulated results. The simulated results show that the optimized energy distribution situation almost achieves 90%. Compared with original data, decoupling degree also has a very great improvement, illustrating that the optimized data has greater effect for the isolated vibration of engine, in order to further verify the feasibility of optimization design method.

Abstract: In consideration of the contact between the steel spiral casing and the peripheral reinforced concrete, a nonlinear analysis for the combined bearing structure of the JinPing-I preloading filling spiral case has been made with ANSYS. Contrasts of the stress of the reinforcing bars, the biggest width of the crack and the outspread section of the crack has been made with the different parameters of preloading pressure and reinforcement scheme, resulting in a reasonable preloading pressure and reinforcement scheme. This conclusion has been applied to the spiral casing of JinPing-I hydropower station.

Abstract: In this paper, based on electric quenching production process in rail and beam factory of Baotou steel, using the finite element software DEFORM-3D, with 60kg/m U75V rail as the prototype, established a three-dimensional model of rail residual heat quenching to simulate and calculate evolution law of tissues and stress on rail head in quenching cooling process in quenching unit, and provides a theoretical basis for finding reasonable optimal cooling rate of rail head in the rail online residual heat quenching process.

Abstract: The paper presents an improved cellular automaton model according to the feature of evacuation near the outlet. We studied friction and turning factors that affect pedestrian evacuation speed. By using mathematical methods to derive expressions of friction function and turning function. The average pedestrian outflow of the simulation that includes the effect of both the frictional function and the turning function agrees well with experiment result. On the contrary, the simulation results that only include the effect of the frictional function are not corresponding to the experiment results well. Simulation results show that friction and turning can not be ignored. By analyzing the simulation results, it verified that the model can accurately reflect the actual evacuation process and has practical value.

Abstract: In this paper we solve the three-dimensional coordinate that the satellite is relative to the geocentric coordinate under certain conditions, making use of the satellite orbit standard trajectory differential equations. By means of the method of tri-parametric equation fitting, we confirm the three-dimensional trajectory function of target flying object to geocentric coordinate in double satellites observation conditions, and analyze theoretical errors.

Abstract: By means of Hogarth curve theory and combined with mathematical model establishment process, equations of drawing Hogarth curve were built and the curve images were restored by mathematical software in this paper, as the evaluation standard of curve aesthetics in fashion design. In the practical application, one can compare the designed curves with the mathematical model of Hogarth curve: the higher degree of fitting, the more beautiful the curve modeling is. This method has good guidance significance in future fashion design and clothing purchase.

Abstract: Natural gas is a major type of distributed energy. In the current power system structure aging, environmental protection, energy utilization efficiency bottleneck and the user requirements for power quality standards increased the world's demand for new energy. So the development of distributed energy has become the common choice of the countries around the world and become the new direction of global energy development. Compared with the traditional energy supply distributed energy has many advantages, but because of its grid producing, feed-in tariffs, subsidies rules is not detailed, unclear development ideas led to the development of distributed energy slowly. How to develop effective policies to promote the development of natural gas distributed energy become the hot spot of attention.

Abstract: This paper designs a spatial data-centric tour and charging scheduler for electric vehicles, which need energy-efficient route planning, especially when visiting multiple destinations, due to their short driving range. Basically, the hybrid orienteering problem solver finds a feasible tour schedule for mandatory user-selected tour spots and optimal system-recommended charging spots, aiming at reducing the waiting time and meeting the given constraint. To recommend essential candidates, our system manages the information on tour spots and charging facilities in the spatial database, adjusting the bounding box size according to the pre-analysis result. The pre-analysis module can implement a sophisticated recommendation logic based on the preprocessed data customized mainly from geographic analysis. In addition, by continuously updating the current status of each charger, the recommender can catch the installation of new charging facilities and exclude the failed or overbooked chargers.

Abstract: For solar power generation system based on single-chip microcomputer control application in the unit worker bath problem, this paper introduces the working principle of solar power, including solar power system of power and solar power, solar power conversion Z - source converter, discusses the hardware of solar power generation system, solar power generation of software, including in software discussed, mainly discusses the A/D interrupt of solar power, solar power generation Timer interrupt the functionality of the M PPT and solar power, solar power system for single chip microcomputer control application in the unit worker bath, provides the technical support.