Applied Mechanics and Materials Vols. 148-149

Abstract: Macroscopic lattice deformation of martensitic transformation and shape memory effect (SME) were studied by atom force microscopy (AFM), X-ray diffraction and so on. The results showed that stress induced martensitic surface relief was “N”-shaped. The surface relief was parallel distribution when deformation was less than 6%. When relief became to intercross, its height and width were far less than parallel relief in same deformation. Superior heat-recovery was discovered in parallel surface relief. The recovery ratio was very low in intercrossed relief. The macroscopic lattice deformation descends in virtue of relief intercrossed, then recovery process was forbidden, so that recovery ratio was descent.

Abstract: The Directional Drilling has been extensively applied in Construction of Highway along with popularizing the Trenchless Technology. The main problem is lower efficiency and design level. In this paper, the automatic analysis system of the main beam, which is a critical component of Horizontal Directional Drilling, has been developed based on ANSYS and APDL, which is a advanced and commercial software. In this system, the processes, such as the modeling, analysis, and optimum of main beam, are automatic completed by modular and packaging technology. Using this system, the quickly design of main assembly unit about Horizontal Directional Drilling can be easily achieved under whole operating conditions. The system reliability and rationality are also put to the proof by some examples. This system has the merits of friendly interface and easily operation, and is an effectual means solving complex mechanical component design.

Abstract: The iterated local search algorithm has been widely used in combinatorial optimization problems. A new fuel consumption objective for the vehicle routing problems was presented in this paper. A fuel consumption modal of the vehicle load is introduced and an improved iterated local search algorithm is used for the problem. An initial solution is generated by the Solomon I1 algorithm, and then the iterated local search algorithm is proposed for the fuel consumption optimization.

Abstract: By the stable operation of the experiments in actual outdoor conditions nearly a year, we find that the property of metallurgical silicon solar cells proves to be stable. The results show that the relationship between S-P could be expressed as a quartic equation. As the higher surface temperature of solar cells at noon on sunny day, both the open circuit voltage and the operating voltage are lower, the output power is reduced. It is concluded that the water cooling on the surface of the solar cells when the temperature T>50°C could improve power generation efficiency.

Abstract: Based on existing understanding of residual capacity, the paper adopts Kalman filtering method on SOC estimation. The battery control unit(BCU) includes voltage, current and temperature sampling module. Due to Lead-Acid battery charging and discharging are a complex electrochemical process, we suggest a non-linear least squares regression method (NLLSRM) on open circuit voltage (OCV) method is proposed to aim at Lead-Acid battery. At the same time, a detailed hardware circuit schemes transfer module and on chip embedded Kalman filter method are employed. Moreover, A Local Interconnect Network (LIN) Bus Communication Technology is applied to communicate to Electronic Control Unit (ECU). Validation experimental results show that the proposed Lead-Acid BCU is high credible and the state of charge (SOC) estimation average relative error is about 3%.

Abstract: As the characteristic of high velocity arc spraying（HVAS）restoration are nonlinear, time-varying and multi-model, it is challenge to identify the model, Takagi-Sugeno (T_S) fuzzy model of abrasion resistance of HVAS coating and technological parameters is proposed. The identification method is presented identifying the consequent parameters with least square method and identifying the input space location and the clustering centre with Fuzzy C-Means Clustering Algorithm. T-S fuzzy model of HVAS tested at the term of examination data, the predictive model and the experiment have the deviation within the-8.6-5.8% limits to abrasion resistance，-8-8% limits to compactness properties.

Abstract: Being an energy-saving project with great development potential, Organic Rankine Cycle (ORC) is becoming one of the research hotspots in recent years. However, there is little research about the waste heat recovery with Organic Rankine Cycle on ships as yet. In this paper, the marine diesel engine waste heat recovery system with Organic Rankine Cycle was designed and analyzed. Isopentane was used as working fluid in the Organic Rankine Cycle. The conditions for the system to recover marine diesel engine waste heat were given, and its schematic diagram was provided. Finally, the ORC turbine which is the most important components of the system was designed. The numerical simulations of the ORC turbine were carried out by using the CFD program. The operation performance and flow field were analyzed.

Abstract: Glass wool mat is widely used in the fields of building engineering, transport facilities and refrigeration equipment. In this paper, the effect of material parameters such as density, thickness, porosity, and flow resistivity on the normal incidence absorption coefficient has been studied. In addition, fiber length is also investigated to achieve appropriate strength. The prediction error of normal incidence absorption coefficient by modified Johnson–Allard model is less than 5% in the frequency range between 800 Hz and 5 kHz. We could use the modified Johnson–Allard model to determine the parameter of glass wool mat for better development.

Abstract: In this study, the adsorption of C. I. Reactive Red 2 from aqueous solution on Ni-Al layered double hydroxide (LDH) was investigated in a batch system. The effect of Ni-Al molar ratio, pH, temperature and initial dye concentration on adsorption of the dye was carried out. The results showed that Ni-Al layered double hydroxide had higher capacity of removal of the dye. Ni-Al LDH with Ni-Al molar ratio of 3 exhibited the maximum dye removal at pH 4.0. Adsorption capacity of dye increased with increasing temperature or initial dye concentration. It was found that the adsorption equilibrium data followed the Langmuir adsorption model. The maximum adsorption capacity obtained from the Langmuir equation at temperature of 30°C was 333.3mg/g (R2=0.991) for the dye.

Abstract: The design principles and implementation of a high-precision temperature and humidity’s monitoring and controlling system is introduced in this paper. The data acquisition and transmission of temperature and humidity node in distributed network is realized by the effective use of high-precision temperature and humidity sensor and CAN-bus. Then the principle experiments are carried out, which indicates that the system overcomes the shortcomings of the traditional temperature and humidity monitoring system, such like low transmission rate and poor real-time service, improve the accuracy of the system acquisition and meets increasingly stringent project monitoring and control applications.