Applied Mechanics and Materials Vols. 411-414

Abstract: The gear system used for large torque transmission consists of one wheel ring with diameter 1264mm and three pinions with diameter 224mm. This assembly can be used to 440kNm and 20Hz dynamical torque transmission. On the basis of FEM, 3-D gear model was established and modal analysis was constructed by using software ANSYS. Two modal analysis methods were used. One of which was equivalent contact stiffness by simplified into a spring model and the other method was considering the pre-stress in the strength analysis. The latter method is more reasonable than the first one because it contains the nonlinear contact factors. The results show that there is no vibration mode with the frequency below 100Hz and no resonance will appear in the following dynamical torque loading tests.

Abstract: In this paper, the mathematical models of a GCHP system and a Ground-couple heat pump system with air-soil thermal storage (GCHPASTS) were developed, and the 20-year performances of the two systems were simulated in severe cold area of china, respectively. The results show that the soil temperature declines gradually during the operation of a GCHP system, which leads to the decrease of the coefficient of performance (COP) and the heating effect of the heat pump year after year. On the contrary, the balance of ground thermal load can be realized during the operation of a GCHPASTS system, and the heating performance of heat pump is stable and efficient for long time. So, it can be proved that a GCHP system cant be used for heating alone, while a GCHPASTS system is feasibility.

Abstract: The damping characteristic of throttle valve of feedback circuit in pressure compensation system is discussed and the working principle of pressure compensation is analyzed in this paper. In order to illustrate the necessity of the existence of the throttle valve and the effect of throttle valve diameter on the stability of pressure compensation system, the system is modeled in AMESim. Through simulation and analysis, we get such a result: hydraulic shocks can be weakened without affecting its speed of response by setting a reasonable diameter of the throttle valve which plays an important role in keeping the stability of the whole system.

Abstract: China is one of the largest coal producer and consumer countries in the world. However, due to the complexity of coal resources, storage conditions, geological disaster-prone coal mines, it is also a coal mine accidents multiple country, coal mine accidents and deaths of China accounted to about 80% total of the world. In the coal mine accident occurred, roof accident has accounted for around 40%,such as the roof collapsed, slipped, deformation, obstruction and so on. So the monitor and early warning of roof is particularly important. State of motion is closely related to mine roof pressure. Roof support pressure or resistance can be measured by the pressure sensor. Applied time series theory analysis and forecasting future pressure changes, can master the roof movement trends and regularity, guide safe production. So the decisions have some practical significance.

Abstract: This paper proposes a topology update solution applied in grid model splicing. Grids physical topology is certified by the numbering of nodes on the end of electric components. This solution sets up a node numbering principle applicable to the whole grid. The numbering of the nodes on the unchanged model section are updated remaining the topology unchanged. Different types of components are treated diversely to avoid reprocessing of the some branch.

Abstract: A unit cell of geometry model is applied to acquire the material matrix of the woven fabric in the study. The softness of woven fabric is related to the flexure modulus, which can be obtained from the acquired material matrix. Two sample fabrics are employed to verify the relationship between the softness and the flexure modulus. It reveals that the results are quite promising as expected. An intelligent support system for determining the softness of the fabric based on flexure modulus can thus be implemented in the future. Through the assistance of the system, the softness for different fabrics can be evaluated without any sample fabrics manufacturing in advance. A designer can determine the softness of a piece of fabric without proceeding with the traditionally essential procedure of sample manufacturing. The goal to increase the design efficiency of innovative woven fabric can thus be achieved.

Abstract: The aim of this study is focused on development and presentation of an intelligent system with a searching mechanism based on GA and an evaluation mechanism based on SAM geometrical model to help a designer design various expected innovative textile product. The search mechanism can efficiently find many manufacture solutions for the fabric, after each of which being evaluated by the evaluation mechanism, there an optimum (or approach to optimum) solution can be obtained. The system can facilitate the fabrics designer to obtain the best combination of weaving parameter during the elastic properties of the fabric (i.e., Young's modulus) being taken into consideration in design. Besides, the system can figure out the other essential characteristics, e.g., the fractional cover and the weight per area (g/100 cm²) of the fabric manufactured by each set of surveyed solution to provide the designer with selections of the functionality of the developing woven fabrics. Through the assistance of the intelligent system, it can become more efficient for a designer to directly idealize his (her) design concept without any sample manufacturing beforehand in a textile product designing. The textile material genome initiative can thus be approved and fulfilled in the near future.

Abstract: PEG-modified GoldMag nanoparticles (PMGN) were synthesized and characterized by TEM and it showed that the size of the composite nanoparticles is range of 50 nm and its saturation magnetization (Ms) was 34 emu/g with zero remanence on the magnetization loop, which was lower than that of GoldMag nanoparticles (42 emu/g). The drug loading rates of PGMN loaded Tubeimoside-2 were 4.11, 11.58 and 11.6 % at the concentration of 0.1, 0.2 and 0.3 mg/ml. The drug loading rates of PGMN marked high than that of GoldMag particles. Our results suggest that PMGN would be developed as a new magnetic targeted drug carrier.

Abstract: This paper investigates the structural feature of X area in PN oilfield and expounds the control function which contemporaneous faults do to the sandstone bodies. Considering the research of the fault growth index, the fault stretching rate and the stretching rate, it can be sure that the activities of a contemporaneous fault happen mainly in the period of Qingshankou Fm the period of Yaojia Fm~ nen the first or the second segments and also the third or the fourth segments. According to the thickening of the weight at each unit time in P reservoir, the strong activity period of contemporaneous faults located in PI3 time unit. Through researches on the distance curve of fault throw and of the ancient fault throw, the growth of contemporaneous faults has an overall performance that it has multi-episodic activity of faults in vertical and different sections on different locations in horizontal. Summarized two kinds of sandbody control methods:The way using downthrown block of contemporaneous fault and sectioning the growing point. The downthrown block of contemporaneous fault method has the same evolutionary series with stratigraphic deposition; the type of sandbody control depends on the evolution of sedimentary environment.

Abstract: Based on the characteristics of low permeability, low pressure, poor effect of conventional waterflood development and low recovery efficiency in Chao Yanggou oilfield, advanced water injection is applied. Taking the Chang 10^th block of Chao Yanggou oilfield as an example, the research on reasonable production time and pressure limit of advanced water injection in low permeability oilfield are carried out using methods of numerical simulation and reservoir engineering. The result shows that the average permeability of the Chang 10^th block is 7.0×10^-3μm², the reasonable time of advanced water injection is about 6 months, and the recovery efficiency increases 2.26% compared with synchronized water injection. The successful application of advanced water injection development technology has some guidance on low-permeability oilfield development.