Advanced Materials Research Vols. 912-914

Abstract: In view of rapid water cut increasing and poor oil recovery with banded distribution with high permeability belt in sandstone reservoir of Huabei Oilfield,the electrical bridge technique for water shut-off is proposed. Based on years practice of vertical wells and similarity in Ohms and Darcys laws,the electrical model involved variable resistors series/parallel instead of reservoir distribution,the arm-bridge circuit combined with signal detection. Then response of the circuit by variable water shut-off could be simulated. The results indicated that,the driving pressure and seepage quantity at mid-low permeability channel could be greatly improved by the strong in-depth water-plugging at high permeability channel (L=20~40m),and the low permeability flowrate increased to a maximum of 55.3%. Then the gel dam in-depth fluid diversion technique was verified by water plugging and circuit simulation. The conclusions provided a valuable guidance for horizontal wells development enhanced.

Abstract: It is found that the relationship the detection function and collision function of non smooth point by using MÜLLER algorithm, and launched the conversion between the different states of gear system of the offset vector. So the unified algorithm of maximal Lyapunov exponent of non smooth gear system is obtained. An example is given to verified this method. The validities of algorithm for largest Lyapunov exponent of gear power systems is proved by comparing the the largest Lyapunov, system phase and Poincaré section.

Abstract: Large long corridor surge chambers have unique form. As a typical hydropower underground structure, its stability of surrounding rock in the process of excavation and force features of structure are affected by particular structure form. Take a hydropower station for example, by using the finite difference method, we simulated two different schemes in process of excavation and analyzed its displacement, stress, plastic zone of surrounding rock as well as force feature of structure. Appropriate law of large long corridor surge chamber during excavation is summarized which will provide the reference for the similar project.

Abstract: This article firstly designed four specimens, including a contrastive specimen and three chemical anchorage reinforcement specimens which reinforcing the beam ends in different ways and then applied low-cycle reciprocating to the four specimens. This paper analyzed the anchor failure performance of the anchorage specimens by testing and data .The research concluded that the chemical anchorage can meet the component single drawing to components yield without failure. With the increasing of the loading series and the cycles improving, the parts of the anchor bars were pulled out.

Abstract: The Waste Briquetting Machine is the main equipment of waste transfer-station, it is also a kind of machine which is controlled by hydraulic system to compress the collecting rubbish into pieces, which realize the reduction of the rubbish to be convenient to transport. This article chooses the buried waste briquetting machine and based on the AMESim software to modeling the compression/pushing mechanical hydraulic system. It also analyzing the single motivation in an unloaded condition and simulating in an as-clad condition. The conclusion is in accordance with the theoretical analysis, which has provided a valuable reference to the study of the waste briquetting machine hydraulic system.

Abstract: Firstly, this paper briefly introduces the Utilization status on marine diesel engine waste heat recovery. Combined with the characteristics of waste heat caused by marine diesel engine and technology of organism Rankine cycle, the paper designs a new waste heat recovery system for marine diesel engine based on organism Rankine cycle, And through researching the changes of temperature between marine diesel engine waste heat and the system working medium, pure organism R123, R245fa or R134a are selected as system's cycle fluid because of environmentally friendly and cycle performance more appropriate. The system application of economy on the ship are analyzed in the theoretical calculation.

Abstract: TDV10 upright type vacuum circuit breaker is mainly used for electric locomotive running in the process of main circuit disconnection and connection, and also applied in the overload protection and short circuit protection.And TDV10 type operating mechanism is pneumatic, pneumatic structure because of its complex structure, cylinder work noise, air leakage risk, now a electromagnetic operating mechanism is designed to replace the pneumatic institution.TDV10 type circuit breaker through analysis the principle and performance parameters of the comparison, put forward the feasibility in theory, and gives the basic design of the electromagnetic mechanism and external circuit.Using Ansoft software design agency for static and dynamic simulation analysis of magnetic field. Through the analysis and comparison of the curve of each parameter, verify the feasibility of the design.

Abstract: Established a finite element model of the school bus based on the Hyper Mesh, take a finite element simulation about the various parts of the school bus parameters such as stress, displacement and deformation under 5 conditions. Through the analysis of the school bus to identify conditions displacement of stress more concentrated area as well as in operation, by optimizing improve the local structure of these regions,improve the stress concentration and safety.

Abstract: With the development of modern aircraft industry, the structure of the plane becoming more and more complex, and the sealing of parts is becoming stricter. Traditional sealing technology began gradually revealed its deficiencies. In this paper, the sealing method of the hydraulic system, oil tank, window and cover of the aircraft is introduced in details. The effective ways to seal have been put forward, and it also offering technical reference to the aircraft parts manufacturer.

Abstract: Based on reasonable abstraction the coupling model about road and vehicle is estabished by means of ADAMS/View. And it uses virtual experimental technique, which is correspondent with road braking performance test, to reach a consensus on virtual test and vehicle test. In the meanwhile, the parameterized vehicle structure adapts to analyze the parameters effect of braking efficiency and stability with variable element analytica.Vehicle structure and employment both are some of the parameters. With the analysis, the major influence factors of automobile braking performance would be obtained and then improve the performance by parameter optimization would be improved