scholarly journals The Simulation Analysis of Factors Affecting Lightning Withstand Level of the Distribution Lines in Oilfield

2020 ◽  
Vol 790 ◽  
pp. 012116
Author(s):  
Jingjing Qi ◽  
Jianing Li ◽  
Zengpeng Hou
Keyword(s):  
Simulation Analysis ◽  
Factors Affecting ◽  
Distribution Lines

Design analysis of a standard injection screw for plasticising polycarbonate resins

2016 ◽  
Vol 36 (5) ◽  
pp. 537-548 ◽  
Author(s):  
Ming-Shyan Huang
Keyword(s):  
Simulation Analysis ◽  
Melt Temperature ◽  
Factors Affecting ◽  
Control Factors ◽  
Screw Length ◽  
Plastic Injection Moulding ◽  
Screw Diameter ◽  
Grey Relational ◽  
Injection Screw ◽  
Simulation Programme

Abstract The industrial use of plastic injection moulding machines is widespread. However, few studies have examined the injection screw, which is one of the key components of moulding machines. Studies have demonstrated that a properly designed injection screw improves both the moulding quality and the production rate. Factors that affect the plasticisation properties of conventional standard reciprocating screws include the screw geometry, the screw operation settings, and the processed resins. An ideal standard reciprocating screw exhibits a high plasticising capacity and excellent melt temperature homogeneity; however, these properties typically conflict. Through simulation analysis, this study investigated the optimal design of a standard reciprocating injection screw used for plasticising polycarbonate resins. First, the Taguchi method was integrated with a commercial simulation programme to identify the key control factors affecting the plasticising rate of a screw and the temperature uniformity of the melt. Simulation results revealed that the screw diameter, rotation speed, metering channel depth, ratio of the screw length to the screw diameter, and compression ratio substantially influence performance. Consequently, grey relational analysis was adopted to optimise the design of an injection screw that ensures sufficient quality according to the plasticisation rate and the homogeneity of molten plastic.

Experiment and Simulation Analysis of the Pressure Carrying Capacity of X80 Pipe with Metal Loss Defect on the Girth Weld

2021 ◽  
Vol 1035 ◽  
pp. 813-818
Author(s):  
Zheng Long Li ◽  
Lin Chen ◽  
Zhi Hong Li ◽  
Guo Shuai Yan ◽  
Wei Li
Keyword(s):  
Sensitivity Analysis ◽  
Carrying Capacity ◽  
Simulation Analysis ◽  
Water Pressure ◽  
Metal Loss ◽  
Factors Affecting ◽  
Element Simulation ◽  
Simulation Based ◽  
Blasting Test ◽  
Water Pressure Blasting

In order to study the pressure carrying capacity of X80 pipe with metal loss defect on the girth weld the water-pressure blasting test of the pipe with metal loss defect was analyzed by experiment and finite element simulation. Based on this, the sensitivity analysis of the factors affecting the pressure carrying of the pipeline, such as the circular size, the axial size, and the depth of the metal loss defect, was carried out. The research results show that the circular size of the metal loss defect on the girth weld had little impact to the pressure carrying capacity of the pipe while it reduced with the increasing of the axial size and the depth of the metal loss defect.

Simulation Analysis of the Pressure Carrying Capacity of X80 Pipe with Plain Dents

2019 ◽  
Vol 944 ◽  
pp. 835-840
Author(s):  
Peng Song ◽  
Zheng Long Li ◽  
Yu Ran Fan ◽  
Lei Guo ◽  
Xi Xi Zhang ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Carrying Capacity ◽  
Formation Process ◽  
Simulation Analysis ◽  
Hydraulic Test ◽  
Factors Affecting ◽  
Element Simulation ◽  
Simulation Based

In order to study the pressure carrying capacity of X80 pipe with plain dents, the formation process and the hydraulic test were analyzed by finite element simulation. Based on this, the sensitivity analysis of the factors affecting the pressure carrying capacity of the pipeline, such as the internal pressure, the confinement state and the material performance, is carried out. Research results show that springback amount of the pipeline decreases due to the initial internal pressure, and constraint state has little effect on the pressure carrying capacity while increases with the increasing of the material tensile properties. When the depth of the dent is less than 6% pipe diameter or the strain of the dent is less than 6%, the dent has little impact to the pressure carrying capacity of the pipe.

scholarly journals A Study on the Multi-Agent Based Comprehensive Benefits Simulation Analysis and Synergistic Optimization Strategy of Distributed Energy in China

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3260 ◽  
Author(s):  
Xiaohua Song ◽  
Mengdi Shu ◽  
Yimeng Wei ◽  
Jinpeng Liu
Keyword(s):  
Energy Demand ◽  
Simulation Analysis ◽  
Evaluation Index System ◽  
Chinese Government ◽  
Optimization Strategy ◽  
Distributed Energy ◽  
Continuous Growth ◽  
Factors Affecting ◽  
Comprehensive Benefit ◽  
Grid Side

With the economic and social development of China, the continuous growth of the energy demand is the trend for now and the future. As a consequence, distributed energy, especially distributed electricity power generation, has received more and more attention. Thus, the scale and utilization level of distributed energy has been continuously improved. However, due to the limitations of current technologies, resources, policies and other issues, the comprehensive benefits and synergy levels of energy sources need to be greatly enhanced. Based on the system dynamics model, this paper examines the factors affecting the comprehensive benefits of distributed energy in China, screens the key subjects, and using the literature review method, combined with the existing literature analysis, constructs a comprehensive benefit evaluation index system and evaluates the comprehensive benefits through case analysis. This paper also sorts out the distributed energy-related Chinese government policies from 2001 to 2017, and considers the scale of distributed energy development, then divides it into two development stages. The synergetic entropy is used to analyze the synergetic development degree of the two-stage distributed energy entities. The synergistic optimization strategy is proposed from the Chinese government side, power supply side, power grid side and user side, which provides theoretical methods and optimization suggestions for improving the comprehensive benefits of distributed energy and promoting sustainable development of energy.

Numerical Simulation of Internal Flow Drag Reduction with Triangular Riblet Surface

2013 ◽  
Vol 779-780 ◽  
pp. 401-405
Author(s):  
Zhi Guo Wei ◽  
Yong Li ◽  
Zhi Wu Ke ◽  
Xian Ling Li
Keyword(s):  
Numerical Simulation ◽  
Drag Reduction ◽  
Simulation Analysis ◽  
Internal Flow ◽  
Factors Affecting ◽  
Actual Application ◽  
Computational Fluid Dynamics Cfd ◽  
Wall Flow ◽  
Flow Drag ◽  
Riblet Surface

Computational fluid dynamics (CFD) numerical simulation is adopted to analyze the drag reduction ability of triangular riblet on tube internal flow. The resistance characteristic of smooth tube and tube covered with triangular riblet surface are compared, and the near wall flow structure over smooth surface and riblet surface are investigated. Based on the simulation analysis, the drag reduction mechanism of riblet surface is studied. Results show that the characteristic dimension of riblet section, i.e., height (h) and width (w) are main factors affecting drag reduction, suggesting that the riblet structure can be optimized according to the actual application condition.

scholarly journals Game Analysis of the Multiagent Evolution of Existing Building Green Retrofitting from the Perspective of Green Credit

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Liwen Chen ◽  
Mengjia Zhang ◽  
Shiwen Zhao
Keyword(s):  
Large Scale ◽  
Simulation Analysis ◽  
Evolutionary Game ◽  
Payoff Matrix ◽  
Strategic Choices ◽  
Existing Building ◽  
The Sustainable Development ◽  
Factors Affecting ◽  
Service Companies ◽  
The Government

Existing building green retrofitting can reduce building energy consumption and greenhouse gas emissions, which is conducive to the sustainable development of the construction industry. The financing dilemma of the existing building green retrofitting hinders the large-scale development of green retrofitting in China. This paper establishes the perceived payoff matrix and evolutionary game model of the government, Energy Service Companies (ESCOs), banks, and owners. Through simulation analysis, the primary factors affecting the choice of game strategy and the stable strategy under different conditions are discussed. The results show that the strategic choices of the government, ESCOs, banks, and owners influence each other in the two game models. Government regulations will have an impact on the strategic choices of ESCOs, banks, and owners. The owners’ strategy choice is closely related to the perceived benefits and costs of retrofitting. Based on the results, corresponding suggestions are proposed to provide theoretical support for the development of the existing building green retrofitting market.

New design of large fully-steerable radio telescope reflector based on homogenized mesh structure

2021 ◽  
Vol 21 (10) ◽  
pp. 244
Author(s):  
Li-De Yan ◽  
Fei Zheng ◽  
Xi Rui
Keyword(s):  
Radio Telescope ◽  
Simulation Analysis ◽  
Structural Complexity ◽  
Radio Telescopes ◽  
Mesh Structure ◽  
Factors Affecting ◽  
Performance Requirements ◽  
Reflector System ◽  
Structure Scheme ◽  
Heavy Structure

Abstract The self-weight of a large fully-steerable radio telescope is one of the important factors affecting its performance. In the existing reflector system scheme, the problem of surface accuracy caused by its large and heavy structure has seriously restricted the application and implementation of large radio telescopes. Therefore, a new mesh structure scheme for a large fully-steerable radio telescope reflector is proposed in this paper. This scheme is based on a homogenized mesh back-up structure in the form of a quasi-geodesic grid and regular quasi-tri-prism or tetrahedron, which can significantly reduce the structural complexity and self-weight of the reflector under the condition that the reflector can meet the desired performance requirements. Finally, the feasibility and rationality of the scheme are evaluated by numerical simulation analysis, which has significant advantages and provides a new design for the reflector of a large fully-steerable radio telescope.

Simulation Analysis and Experimental Research on Silage Corn Crushing and Throwing Device

2021 ◽  
Vol 37 (4) ◽  
pp. 725-734
Author(s):  
Kang Niu ◽  
Qizhi Yang ◽  
Shenghe Bai ◽  
Liming Zhou ◽  
Kaikang Chen ◽  
...  
Keyword(s):  
Field Experiments ◽  
Simulation Analysis ◽  
Dynamic Balance ◽  
Scientific Basis ◽  
Simulation Software ◽  
List Type ◽  
Corn Stalk ◽  
Motion Simulation ◽  
Factors Affecting ◽  
Design And Optimization

HIGHLIGHTS The mechanism of straw smashing was analyzed. Factors such as the speed of the cutter shaft, the number of blades, the thickness, and the inclination angle had a greater impact on the theoretical length of the straw section after crushing. Based on the straw crushing mechanism, the structure of the crushing chamber was designed. The corn stalk crushing and sending device was trial-produced and field experiments were carried out. ABSTRACT . In order to further improve the crushing quality of corn stalks, this research designs a corn stalk crushing and throwing device. First, it introduced the overall structure and working principle, and analyzed the crushing mechanism of corn stalks to obtain the main factors affecting its crushing performance. Then, the crushing blade in the crushing chamber was designed to determine that the number of crushing blades was 10. Kinematics and dynamic balance analysis, and the establishment of a mathematical model, the speed range of the crushing cutter shaft was 530~900 r/min. On this basis, the ADAMS motion simulation software was used to measure the change curves of the restraint force, runout, and acceleration of the shaft end with different speeds of the crushing cutter shaft. The simulation analysis finally determined that when the speed of the crushing knife shaft was 700 r/min, and the working performance of the device was better and meets the requirements of dynamic balance. Finally, the verification test was carried out, and the result shows: when the speed of the crushing knife shaft was 700 r/min, the qualified rate of corn stalk crushing length was 93.65%. Compared with the original silage corn crushing and throwing device, the performance had increased by 4.78%. It meets the standard of corn stalk crushing operation, which can provide a theoretical basis and scientific basis for the design and optimization of corn stalk crushing and returning equipment. Keywords: Crushing mechanism, Dynamic balance, Motion simulation, Silage corn.

scholarly journals Peanut Drying Energy Consumption — A Simulation Analysis

1982 ◽  
Vol 9 (1) ◽  
pp. 40-44 ◽  
Author(s):  
J. M. Troeger
Keyword(s):  
Energy Consumption ◽  
Simulation Analysis ◽  
Computer Simulation Model ◽  
Airflow Rate ◽  
Ambient Conditions ◽  
Efficient Manner ◽  
Drying Time ◽  
Milling Quality ◽  
Factors Affecting ◽  
Available Energy

Abstract During the past few years the cost of conventional sources of energy has dramatically increased and future supplies are uncertain. Available energy sources must be used in the most efficient manner. However, with any changes in recommended peanut drying procedures, product quality must be maintained. An analysis of various factors affecting energy consumption and drying time of peanuts was performed, using a computer simulation model. The analysis included consideration of ambient conditions, dryer controls, and initial peanut moisture. The analysis indicated that the airflow rate used in many commercially available farm dryers is necessary to adequately dry high moisture peanuts, but that a lower airflow rate would be adequate for low-moisture peanuts. A lower airflow rate would reduce energy consumption. Increasing the temperature rise of the drying air would speed drying but would also lower milling quality. Energy consumption was lowest early in the drying season when ambient drying potential was high.

Simulation analysis of factors affecting air route connection in China

2016 ◽  
Vol 50 ◽  
pp. 12-20 ◽  
Author(s):  
Yaping Zhang ◽  
Ting Peng ◽  
Chuanyun Fu ◽  
Shaowu Cheng
Keyword(s):  
Simulation Analysis ◽  
Factors Affecting
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