Advanced Materials Research Vols. 1008-1009

Abstract: Quasi-static finite element simulation is carried out on buckle propagation phenomenon of offshore pipelines under external pressure. Arc-length method and volume-controlled static analysis by employing hydrostatic fluid element F3D4 are employed to calculate the steady buckle propagation pressure. After verifying the validity of numerical model, emphasis is on the influence of tension on propagation pressure considering isotropic hardening elastoplastic and elastic-perfectly plastic materials. Parametric study is conducted to include the effect of diameter-thickness ratio, after which two empirical equations are derived by curve fitting procedure. Finally, some comments on the results obtained through rigid-plastic hinge model are presented and a modified plastic hinge model including effect of material anisotropy is derived. The results can serve as a reference for more reasonable design of buckle arrestors.

Abstract: The edge etcher machine is fully automated with very dangerous chemical circumstance; the shortcoming is low capacity for production, it spends too much time on the centering process, we use vision system to reduce the time of centering process and increase the capacity of production.

Abstract: Supersonic swirling separator has been developed for natural gas dehydration in recent years. Compared to Twister-I supersonic swirling separator, Twister-II type overcomes the disadvantage of uncontrolled shock and the steady swirling flow field contributes to high efficiency of gas-liquid separation. The design method is discussed. For the Laval nozzle, the contraction section is designed by double cubic curve method, while the method for expansion section is tapered tube method the same as the divergent tube, throat is smooth circular arc; the length of straight swirling pipe section for separation is 3-8 times of the diameter. The paper simulates the applicability of the supersonic swirling separator by Fluent. Studies have shown that the lower environmental temperature, the lower the outlet temperature, the easier water to cool, and the higher the separation efficiency. If the volume flow rate rises, the inlet velocity and the mass flow rate can be effectively improved. We can control the shock location by adjusting the pressure at the outlet of divergent pipe. The shock appears at the inlet in the working condition designed. When the outlet pressure is lower, the shock occurs in divergent tube; on the opposite, it moves forward. Beyond a certain degree, shock occurs at the Laval nozzle, the device fails to work.

Abstract: It is important for sailors to master the control principle of fresh water generator. According to the principle of fresh water generator and by the use of programmable controller technology, a simulating control system on fresh water generator was designed to meet the need of sailors training and competence assessment. The system illustrates vacuumizing, supplying sea water, heating and condensing of the fresh water generator. It helps sailors to master the basic operation of fresh water generator.

Abstract: In this paper, we elaborated the common failures of the Total Organic Carbon (TOC) analyzer, and proposed the solution for each failures. At the same time, we also introduced the considerations of daily maintenances.

Abstract: 3D printing techniques gives a new power systems equipment industrial designing methods. In article considered a new constructor (kit) of 220/110 kV 250 MVA autotransformer from 220 kV «Ryabina» substation in 1/35 scale. Kit, realized by bachelor students of UrFU.

Abstract: This article describes the problem of practical knowledge lack in modern education system and gives the solution of the problem by creating the laboratory for the scale models production. This laboratory allows to create all 110 kV, 220 kV and 500 kV power equipment in all generally accepted scales. Low price of such scale models makes the product available for students of any educational institutions.

Abstract: With the constant increasing of the complexity of weaponry, it difficulty of maintain degree ensure in constant increasing too. IETM, as the important informatization means of equiping maintaining and ensuring,is playing a more and more important role,and ,it directly determines whether equiping could finish the corresponding guarantee to require within shorter time.At the same time, the interactive function in IETM is the important element of human-computer interaction, the rationality, scientifically and intelligently of its design determine directly whether the whole IETM could reach the level of intelligent human-computer interaction. This text show from the designs of interactive display function and relevant function matrix, analyse and summarize the design of its relevant functions in the hope of laying a foundation for the human-computer interaction of IETM.

Abstract: In this paper, an approach of fuzzy Petri nets (FPN) is proposed to simulate the fault spreading and diagnosis of hydraulic pump. First, the fuzzy production rules and the definition of FPN were briefly introduced. Then, its knowledge reasoning process and the matrix operations based on an algorithm were conducted, which makes full use of its parallel reasoning ability and makes it simpler and easier to implement. Finally, a case of hydraulic pump fault diagnosis with FPN was presented in detail, for illustrating the interest of the proposed modeling and analysis algorithm.

Abstract: Rational exploitation of wave energy makes great contribution to relief the current global energy crisis. Power generation has been taken into the agenda as the main form to utilize wave energy. The point absorber in this paper is simplified to three modules: floater, pontoon and chain. Based on the theory of linear regular wave, the research task of the point absorber is to improve the conversion efficiency and device reliability. This paper researched on the double floater wave energy converter by hydrodynamic numerical calculation, studied the factors that contain the PTO system damping coefficient, wave frequency and the device mass and other factor which can influence the energy conversion efficiency. At last, we found an optimized method for the energy conversion efficiency.