Su J.,Dalian University of Technology |
Yang J.H.,Dalian University of Technology |
Lu W.,Dalian University of Technology |
Wang Y.,China Liaohe Petroleum Engineering Co. |
Lv Z.F.,China Liaohe Petroleum Engineering Co.
Information Technology and Computer Application Engineering - Proceedings of the 2013 International Conference on Information Technology and Computer Application Engineering, ITCAE 2013 | Year: 2014
The process of coal-bed methane gathering includes two important parts: coal-bed production and gas compression by booster station. So the fault often occurs in these two parts. In this article, we adopt FAM(Fuzzy Associative Memory) neural network to realize compressor fault diagnosis. This model implements intelligent fault diagnosis and self-learning of the knowledge database.Thus it significantly improves the accuracy and scalability of fault diagnosis system of the reciprocating compressor. The system has been adopted in experiment. In addition, the fault diagnosis system is based onVisual Studio 2008. NET and SQL sever 2005 to monitor operation parameters and equipment status real-timely and to realize fault management and diagnosis. The system has friendly man-machine interface and is more convenient and easy to understand the operation flow, more powerful to store data and more easy to embed fault diagnosis algorithm into it. © 2014 Taylor & Francis Group, London.
Huang L.,Dalian University of Technology |
Li B.,Dalian University of Technology |
Lei G.,China Liaohe Petroleum Engineering Co. |
Shi D.,China Liaohe Petroleum Engineering Co.
Applied Mechanics and Materials | Year: 2012
Suspension aerial crossing structures are broadly applied for supporting petroleum pipelines across special terrain for their optimal structural style and constructional benefit. Due to the general flexibility of the structures, pipeline suspension bridges easily vibrate under the action of random wind forces. One of the typical vibration responses, known as buffeting, is considered to be an important factor for the serviceable safety of suspension bridges. In this paper, the dynamical model of a suspension pipeline bridge is presented and buffeting analysis under the action of wind loads is carried out through the Finite Element Method. It is shown that the frequency spectrum of the suspension pipeline bridge is composed of densely distributed modal frequencies. Low frequencies are mainly focused on horizontal and vertical bending motions of the bridge. Based on the standard harmonic response analysis, the Pseudo-Excitation Method (PEM) is introduced to obtain the buffeting vibration in response to the wind excitation. The correlative formulas of quasi-static buffeting force model are derived, and the buffeting analysis of the bridge using PEM is achieved on the solution platform Ansys.
Yu F.,Zhejiang Sci-Tech University |
Wu C.-J.,Zhejiang University |
Liu H.-K.,China Liaohe Petroleum Engineering Co. |
Xia T.-D.,Zhejiang University
Geotechnical Special Publication | Year: 2014
Cast-in-place concrete tubular piles have been recently introduced into road construction to serve as ground-improving columns that sustain a considerable portion of the embankment load. With respect of the characteristics of such piles in geometry and stiffness, traditional settlement-predicting approaches for composite ground may be no longer suitable. This study discusses the load-carrying behavior of composite ground with particular focus on the variation in the load share of piles. Based on the Mindlin's and the Boussinesq's solutions, a new model is developed to calculate the additional stresses generated respectively by the resistances of pile base, pile shaft and soil plug, as well as the surcharge directly acted on the ground. A case history is presented to demonstrate how the model works and also to examine the consistency between the measurements and predictions. © 2014 ASCE.
Song Y.,Northeast Petroleum University |
Song Y.,State Key Laboratory Cultivation Base Jointly Const by Heilongjiang Province and the Mini of Science and Technology |
Jiang Y.,Northeast Petroleum University |
Jiang Y.,State Key Laboratory Cultivation Base Jointly Const by Heilongjiang Province and the Mini of Science and Technology |
And 2 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2014
At present, Archie's formula with variable cementation exponent(m) and saturation exponent(n) is still applied in quantitative evaluation of saturation of low resistivity oil reservoirs as one of the main methods. However, the influencing factors of m and n in low resistivity oil reservoirs are varied with area due to the different causes of low resistivity oil reservoirs. Therefore, the study on influencing factors and variation laws of m and n in Archie's formula in low resistivity oil reservoirs in different areas is necessary. Samples of low resistivity oil reservoirs are cored in Putaohua Formation of southern Golong area according to division standard of low resistivity oil reservoirs, and also have definite variation of lithology, physical property, electric property. Then, petrophysical experiment of one sample is designed. A plot of m and n with parameters of petrophysics, pore structure, excess clay conductivity is made from petrophysical experiment data. The analysis shows that the values of m and n in low resistivity oil reservoirs is less than those of m and n in conventional oil reservoirs, and m and n in low resistivity oil reservoirs increase as porosity and permeability composite index, median radius, mean radius, radius mean increase. The m of low resistivity oil reservoirs decreases as shale volume fraction, cation exchange capacity, the ratio of micropore volume and movable fluid volume increase, and increases as T2 geometric mean value increases, while the n of low resistivity oil reservoirs increases as porosity, the ratio of porosity and shale volume fraction increase. The m has a good correlation with T2 geometric mean value, the ratio of micropore volume and movable fluid volume in low resistivity oil reservoirs, while the n has an excellent correlation with porosity and permeability composite index, mean radius, maximum radius, radius mean. The result reveals that pore structure has a larger effect on m and n of low resistivity oil reservoirs, and also shale volume fraction has a larger effect on m of low resistivity oil reservoirs, and T2 geometric mean value or the ratio of micropore volume and movable fluid volume can be used to determine the m of low resistivity oil reservoirs, and porosity and permeability composite index, average radius, maximum radius, radius mean can be used to determine the n of low resistivity oil reservoirs.
Liu T.,China Liaohe Petroleum Engineering Co.
Advanced Materials Research | Year: 2013
To solve the high nonlinear mapping relationship between mechanical parameter and rock performance in underground engineering and to improve the uniqueness of optimal result in parameter recognition, a new multi-information intelligent identification method of rock mechanics parameter is proposed. By coupling neural network and genetic algorithm as an evolutionary algorithm, the global and nonlinear optimization search of mechanical parameters in the method is realized. And by building the associated fitness function to absorb multi-information, the method can improve the uniqueness of searched objective as far as possible. Application in Laxiwa underground powerhouse, the largest underground cavern in Yellow River valley, indicates that the intelligent method is very reliable and efficient in identification of rock mechanics parameter and in assistant design of underground engineering. © (2013) Trans Tech Publications, Switzerland.
Tian F.,China Liaohe Petroleum Engineering Co.
Petrochemical Equipment | Year: 2015
Seal plays a crucial role in operation of large storage tank, and the poor contact between seal and tank walls under long-term running appear. In view of this situation, the reasons with measurement data in project base are found and this problem by increasing the transition component is solved. According to the owners, this method is simple, safe and reliable. The large storage tank can be reconstructed without stopping running and it's operable. © 2015, Lanzhou Petroleum Machinery Research Institute. All rights reserved.
Tian F.,China Liaohe Petroleum Engineering Co. |
Pei Z.-H.,China Liaohe Petroleum Engineering Co.
Petrochemical Equipment | Year: 2015
The connection structure between long circular column and shell is put forward by GB 12337 - 2014 Steel spherical tanks, the new standard of spherical tank. For the spherical tank of heavy medium, it comes about the local stress concentration on top of the connection between vertical plate and shell. Long circular column is optimized on the basis of the original structure, which is taking an example of 5 000 m3 LPG spherical tank, making stress analysis in finite element of two kinds of structure before and after optimization under the same conditions in finite element. The results show that where the stress distribution improved is the original stress concentration of the optimized structure. © 2015, Lanzhou Petroleum Machinery Research Institute. All rights reserved.
Pei Z.-H.,China Liaohe Petroleum Engineering Co. |
Guo T.-S.,China Liaohe Petroleum Engineering Co.
Petrochemical Equipment | Year: 2016
In recent years, with the rapid development of the petrochemical industry and the continuous improvement of the level of the domestic pressure vessel manufacturing, the number of multilayer bundled vessels which pressure is more than 35 MPa is also increased. This design of 99.75 MPa, DN700 mm multilayer bundled vessel will be introduced, hoping to have reference function to the design of the multilayer bundled vessel which pressure is close to super-high pressure. © 2016, Petrochemical Equipment. All rights reserved.
Xiao L.,LIAONING Technical University |
Geng X.,LIAONING Technical University |
Pei G.,China Liaohe Petroleum Engineering Co.
Chinese Journal of Environmental Engineering | Year: 2016
Using Na2S as the regeneration agent, this study investigated the fixation of heavy metal ions by a bentonite-steel slag composite granular adsorbent and its regeneration after adsorption saturation with Fe2+, Mn2+, Cu2+, and Zn2+. Specifically, this study explored the fixation of heavy metal ions by the adsorbent, the possibility of regeneration, and the adsorption capability after repeated regeneration. The mechanisms of the fixation of metal ions and the regeneration of the adsorbent were explored using SEM (scanning electron microscopy) images. The experimental results showed that Fe2+ was fixed by the adsorbent in the form of FeS precipitate. However, after regeneration by Na2S, the structure of montmorillonite in the adsorbent was altered, resulting in the collapse of the adsorbent into powder. This result indicated that Na2S was not suitable for the regeneration of the adsorbent saturated with Fe2+. In the case of Mn2+, Cu2+, and Zn2+, these metal ions were fixed owing to the formation of metal sulfide precipitates, while the structure of the granular adsorbent was not modified in the regeneration process. After regeneration was performed three times, the removal efficiencies of the adsorbent for Mn2+, Cu2+, and Zn2+ were 94.22%, 83.2%, and 76.30%, respectively, which were far better than the case without regeneration. SEM images further revealed the synergistic effect of Na2S solution as the regeneration agent in terms of enhancing the fixation of metal ions as metal sulfide precipitates and the repeated regeneration of the adsorbent without compromising the adsorption capability. © 2016, Science Press. All right reserved.
Lei G.,China Liaohe Petroleum Engineering Co.
Applied Mechanics and Materials | Year: 2013
According to the seepage action of hard rock fissure water, a numerical simulation method is proposed in this paper. The basic mechanical properties for rock mass changed significantly during the process of secondary stress adjustments, and the rock deterioration constitutive model (RDM) can accurately reflect both the abruptness of the rock yield failure and the changes of mechanical parameters after yield. On the basis of RDM, the permeability coefficient with equivalent plastic strain function was introduced in this method which can update the permeability coefficient, and carried out numerical simulation on hard rock fissure water seepage action by FLAC3D. The results of the seepage triaxial compression experiment proved the rationality of the method. © (2013) Trans Tech Publications, Switzerland.