Applied Mechanics and Materials Vols. 380-384

Abstract: Aircraft in flight, such as supercooled water droplets encountered icing conditions suitable for the external environment, the relevant parts of the body will freeze, making the aircraft's aerodynamic performance deterioration, severe endanger flight safety, in addition, the aircraft parked in the open winter months , there will be icing, you need to clean up before takeoff. We should grasp the mechanism of aircraft icing, environmental factors and easy to freeze parts of the body. This paper presents a simulation using the wind tunnel icing device icing wind tunnel simulations can reproduce the real situation of aircraft icing, for guiding practice and got good results.

Abstract: Benard convection model is a famous model in non-equilibrium thermodynamics. It had been widely studied, but we had found there are few of the studies on the effect of different initial values on Benard fluid. Benard convection model of free surface are established for simulating two dimension stable flow field with different Benard cells. When the Ra Number is varied between 10050 and 78725, the positive and the negative benard flow with 2 or 3 Benard cells are used as the initial value in the numerical simulation corresponding to the same conditions. Results confirm that the different initial values have no effect on the formation of stable Benard cells. This study is a successful application of numerical simulation in the issue of Benard.

Abstract: The survey ship would be interfered by wave-generated magnetic field in marine survey. The waves magnetic field is difficult to eliminate because it is the signal in low frequency like ships magnetization field. When survey ship sails, the frequency of waves magnetic field would change. It was found that the frequency has a linear relationship with ships speed and varies in sine or cosine with the angle between ships and waves directions. Ocean waves PSD would be compressed and strong noise of low frequency in narrowband turns up when ship sails in the same direction of waves. The frequency band of PSD would be broadened and small interference occurs while ships direction is opposite. A conclusion can be drawn that survey ship should sail reversely with ocean waves in marine magnetic survey, so the magnetic field induced by ocean waves would extend to high frequency and it is better for noise elimination.

Abstract: With the upsurge of marine research coming, research of the bionic fish robot is imperative. In numerous kinds of fish, batoid as the representative of the undulating pectoral fins fish are characterized by maneuverability which adapted to the complex underwater environment. This paper establishes entity model, kinematics model and dynamic model of batoid, uses means of numerical simulation to realize batoid turning in the water , and then plans turning motion of batoid. For this simulation, trajectory which is very close to the turning of real batoid is obtained to prove our modeling and simulation correct.

Abstract: With worsening traffic condition in large and medium-sized cities, it has become one of the most important steps for the urban traffic strategy to solve the traffic problems. Since the urban traffic is a complex system in various factors and huge scale, to establish related mathematical model through computer numerical simulation is a significant solution to the comprehensive problems of complex analysis, decision and planning. At present researches on the problems have been achieved in many foreign countries, but domestic research is not enough, especially in the practical application. The macroscopic traffic flow model and microscopic traffic flow model are described and cellular automaton model, dual channel decision model and car-following model are analyzed in this paper, prediction of the ideal traffic flow and trip distribution is consequently concluded, which deepen the understanding to the traffic flow of various phenomenon intrinsic mechanism and predict most closely to the actual situation of traffic flow, which can make fundamental work for traffic flow simulation and for real-time traffic control^[1-3].

Abstract: Small marine equipment works in the marine environment which are enduring the erosion of the big storms over a long period of time , this environment seriously affects the normal operation life. Designing a secure system can be widely used in the working process of small marine engineering equipment, the security system mainly uses sinking buoy as floaters which can sink and float in the sea. When bad weather comes, the system is sinking by the buoys to drive the marine equipment to avoid the adverse environment. Analyzing the stress of the secure system in water by using hydromechanics knowledge can improve the feasibility of design further, to ensure stable operation of secure system for the small marine equipment.

Abstract: The efficiency of continuous reconnaissance of UAV formation will be changed with the number of UAVs, the detectability of UAV and target strength. The crossing line method is used to evaluate the efficiency of continuous reconnaissance of UAV formation. In this paper, the reconnaissance system of UAV formation in multi-target situation is analyzed using the method of Agent Based Modeling and Simulation (ABMS); and then the influence of the number of UAV, the detectability of UAV and target strength on reconnaissance effectiveness is also analyzed. Simulation results show that the number of UAVs and the detectability of UAV have a significant influence on the capability of continuous reconnaissance.

Abstract: In this paper, we study the problem of real-time traffic lights scheduling in a three-dimension intersection. Here, we propose a traffic lights scheduling strategy to optimize the traffic lights sequence and duration according to traffic data detected and predicted in real-time, containing traffic volume, delays and traffic density. Simulations are carried out to compare the performance in terms of average delays, and the evaluation depicts that this strategy can obtain lower average waiting delays.

Abstract: As microgrid is a significant part in the development of smart grid, researches focusing on operation efficiency, intelligent control and smooth transition with the main distribution network are very important in advancing micro-grid technology. This paper studies multi-microgrid control strategy based on IP and MAS and divided microgrid to three levels which are important, less important and unimportant. Then simulation experiments are designed to realize seamless transition between connected mode and island mode, intelligent management of microgrid by priority when the output power of main grid decrease.

Abstract: In order to fulfill the application requirements of foundry industry, especially for the bulky casting sand, a kind of desiccations resolution using the air heater is put forward. The realization of kernel control units, the temperature collection circuit and the control system algorithm, has been given a detailed description. It is proved by the simulation results in the open environment that, this programming has a more satisfactory response speed and a relatively high degree of coincidence heating curve, and also, it can be better meet the design requirements of the air heater temperature control in foundry industry.