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Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The research and application of assembled bridge deck system is helpful to further promote the level of industrial construction of railway bridges. In order to evaluate the safety, rationality and feasibility of the design and fabrication process of the new type of integral bridge deck accessory structure, according to the stress response and failure mode of the prefabricated bridge deck accessory protective wall structure under horizontal load, the design and manufacture of full-scale model, test scheme design and whole process failure test were carried out and compared with finite element simulation analysis. The stress characteristics, deformation law and bearing capacity of each member and connecting member were obtained. The results show that the bearing capacity of the protective wall during the measured failure is 1.65 times of the design value, and the fabricated protective wall of the ancillary facilities on the bridge deck can meet the design requirements and has a good degree of safety, which ensures the operation safety of the high-speed railway bridge. At the same time, the simulation method of the protective wall of the precast bridge deck ancillary facilities based on the ABAQUS platform is obtained, the maximum deviation of the peak value is less than 0.7%, and the maximum deviation of the loading process is less than 2.8%, which verifies the effectiveness of the simulation method proposed in this paper, and shows that the finite element model can accurately predict the actual stress state of the structure. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Rainfall is one of the main factors leading to slope instability. In this paper, taking the slope of a phosphate mine dump in central Yunnan as an example, the influence of continuous rainfall on the stability of the 6s dump slope is studied. Based on the theory of saturated unsaturated soil seepage, the dynamic change, deformation failure, and stability of saturated unsaturated seepage field under continuous heavy rainfall are simulated and calculated by using the indoor unsaturated soil static triaxial test combined with GeoStudio finite element method. The results show that the greater the matrix suction in the initial stage of rainfall, the higher the safety factor of the slope. However, after 12 hours of rainfall, the safety factor is basically not affected by the matrix suction and is basically consistent with the theoretical calculation results. The overall stability of the slope is good, which is consistent with the actual situation of the dump. When rainwater infiltrates continuously, the plastic deformation area of multi level bench dump is mainly concentrated at the foot of the slope. The simulation results are generally reliable, which can provide reference for the safety production of multi step dumps in continuous heavy rainfall areas and mine dumps in central Yunnan. [ABSTRACT FROM AUTHOR]

In order to realize the recovery and utilization of tailings resources and ensure the safety of tailings ponds during the process of mining. This paper takes the Mapiyi Tailings Pond as the engineering background. Based on the survey and indoor soil test data, the finite element model was established by using the numerical simulation software Midas GTS/NX, and the three dimensional static stress field numerical analysis was carried out for its mining process through FLAC3D. The results show that the maximum principal stress and the minimum principal stress are both negative and the maximum shear stress is positive during the mining process, which indicates that the stress is mainly affected by the compressive stress of the dead weight and the pressure and maximum shear stress corresponding to the minimum and maximum principal stresses decrease as the mining height decreases. The overall displacement of the reservoir area changes with the decrease in the height of the filling dam, but considering the actual construction of the reservoir area mining can be ignored. The tailings pond is in equilibrium during the mining process. When the mining reaches the initial dam crest, the mountain displacement at the side of the tailings pond increases, which means that the monitoring and protection of the mountain around the mining of the tailings pond should be strengthened. The research results provide important theoretical guidance for the recovery of tailings pond resources. [ABSTRACT FROM AUTHOR]

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Liaoning Technical University (Natural Science Edition) / Liaoning Gongcheng Jishu Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of Liaoning Technical University (Natural Science) Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transportation Science & Technolgy is the property of Transportation Science & Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forest Engineering is the property of Forest Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Forest Engineering is the property of Forest Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Plant roots have considerable impact on the shear properties of soil, but to date the underlying mechanisms have been poorly quantified. In order to understand the fundamental mechanisms of soil reinforcement by Hedysarum scoparium roots and reduce the cost of the testing and relieve the destruction of environment due to digging roots, five-year plant specimens were collected from the Gaoshawo forest field (Northwest China) by in-situ excavation in this study. The shear properties of root-soil composite of Hedysarum scoparium were studied by the finite-element numerical simulation software. The influence of the root area ratio (RAR) and the vertical load on the shear strength of root-soil composite of Hedysarum scoparium was discussed in this study. The laboratory direct shear test was used to prove the reliability of the numerical simulation under the condition of the 7% soil moisture content and the RAR of 0.0034. The results showed that the shear strength of roots-soil composite conformed to the Mohr-Coulomb's yield criterion and the roots of Hedysarum scoparium could notably enhance the soil shear strength. It was also found that a strong correlation between the RAR and the root apparent cohesion. The root apparent cohesion increased with the increasing of the RAR according to a linear function (R2>0.9). Under the same RAR, the capacity of soil reinforcement by the roots was weakened with the increase of the vertical load, and a logarithmic function (R2>0.9) could be used to describe the relationship between the shear strength growth rate of root-soil composite to pure soil and the vertical load. Under the same vertical load, the growth rate of shear strength of root-soil composite to pure soil decreased linearly with the decreasing of the RAR (R2>0.9). The roots of Hedysarum scoparium played an obvious role to reinforce soil under the low vertical loads. The results of the study indicated that the peak value of the shear stress of root-soil composite of Hedysarum scoparium appeared later compared with that of pure soil. It implied that the root reinforcement did not occur until the significant plastic deformation appeared. Therefore, the roots seemed to have little influence on soil reinforcement for small strains acting on soil-root composite. The numerical simulation results were consistent with the results of laboratory test (the maximum relative error was only 4.26%). It was found that an increase in the vertical load of root-soil composite of Hedysarum scoparium made the contribution of roots to the shear strength increment of root-soil composite decrease. The differences of the cohesion stress and friction angle of root-soil composite of Hedysarum scoparium were only 0.6179 kPa and 0.0039° respectively based on the fitting equation between the vertical load and the shear strength. The fitting equation was developed from the numerical simulation and the laboratory direct shear test results. This paper presented a numerical simulation model capable of simulating the direct shear of root-soil composite of Hedysarum scoparium. The numerical simulation results could serve as the basis and reference for further studies on shear characteristics of root-soil composite. [ABSTRACT FROM AUTHOR]

The transformer oil was taken as the object of study in this paper' and the finite element method (FEM) was employed to analyze and solve the partial differential equations (PDE) which was built under needle-sphere electrode for describing the generation and transport properties of free charge carriers' and then the dynamics characteristics of space charges in the liquid-gap pre-discharge process under step voltages were gained. According to the simulating results' the fundamental causes of the dielectric liquids breakdown are described as follows' the pre-breakdown current is firstly formed by the generation and migration of the charge carriers in the oil gap' and then the joule heat generated from it makes temperature rise along the oil-gap. Meanwhile' the streamer is continuously evolving in the liquid. Then these conclusions enable people to easily understand breakdown mechanism of the liquid dielectrics that are reasonably applied to power system fields. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Computational Mechanics / Jisuan Lixue Xuebao is the property of Chinese Journal of Computational Mechanics Editorial Office, Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A finite element model combined with bridge deck pavement structural style is established to analyze mechanical properties and influence factors of bridge' deck pavement structure. The effect of different levels braking force coefficients, top and bottom layer material modulus combination of bridge deck pavement, deck pavement thickness variation are analyzed. Results show that different horizontal loads have little effect on principal stress but much effect on shear stress inside the pavement layer. With the increase of horizontal load, the maximum shear stresses inside pavement layer and waterproof adhesive layer increase linearly. Principal stress inside the pavement layer changes little, while shear stress between layers decreases in a small amplitude with the increase of combination modulus of pavement layer. Increase of the thickness of pavement layer has little effect on principal stress and maximum shear stress between layers decreases with increase of thickness. Conclusions obtained by this paper can be used to provide theoretical reference for material selection and structure design of bridge deck pavement. [ABSTRACT FROM AUTHOR]

Based on a full degrees of freedom finite element model of gears, this paper presents a comprehensive approach to build a model of coupling geared rotors system. Gyroscopic effects and bearing support were considered in the model. Vibration property of geared rotor system can easily be analyzed by using this approach and effects of direction change of gear meshing line on dynamic meshing force is involved in the analysis. Forced response of a typical 2-stages geared system is investigated and good agreement between numerical simulation and experimental measurement was obtained. Mathematical model of a multi-stage pump was built according to previous approach and the results of numerical simulation show that coupling gears have obvious influences on vibration characteristics of the pump. These results are helpful for safe operation of the multi-stage pump. [ABSTRACT FROM AUTHOR]

The pile foundation in slope has to bear the vertical load transfer of the upper structure. It is also subjected to the thrust of the post-landfall slope. Through the indoor model test, the model piles were placed in the middle of slopes with slope angle 15, 30 and 45 degrees, respectively. The effects of different slope angles on the horizontal bearing capacity and bending moment of single pile were evaluated. The 15°, 30° and 45° slope models were all developed by ABAQUS finite element analysis software to simulate the bearing behavior of the single pile under the complicated load. The results showed that with the increase of slope angle, the earth pressure behind the piles were increased, which increased the horizontal thrust of the piles, It increased the horizontal displacement and bending moment of the pile. The different loading sequence has an effect on the horizontal load characteristics. The horizontal bearing capacity of a single pile can be improved by applying vertical load in advance. A horizontal load applied in advance followed by a vertical load adversely affects the horizontal bearing capacity of the single pile. [ABSTRACT FROM AUTHOR]

Finite element models of iced quad bundle conductor lines were set up and galloping processes of these lines were numerically simulated by means of ABAQUS software. Based on the analysis of the dynamic characteristics of the conductor lines and the galloping responses, the galloping vibration modes, frequencies and amplitudes of the continuous multi-span lines with different span lengths and span numbers were investigated and compared with those of the single-span dead-end lines. It is shown that the galloping modes and frequencies of the two end-spans of the multi-span lines are different from those of the intermediate spans, and the galloping characteristics of the multi-span lines are different from those of the single-span lines, which have to be taken into account in the development of anti-galloping technology. [ABSTRACT FROM AUTHOR]