Research on the dynamic calculation model for a dc solenoid electromagnetic contactor and its contact characteristics in break process

2015 ◽  
Author(s):  
You Jiaxin ◽  
Liang Huimin ◽  
Ma Guangcheng ◽  
Chen Shuqing ◽  
Cai Zhaowen
Keyword(s):  
Calculation Model ◽  
Dynamic Calculation ◽  
Break Process

scholarly journals Seismic Response of Prestressed Anchors with Frame Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Shuaihua Ye ◽  
Zhuangfu Zhao
Keyword(s):  
Seismic Response ◽  
Shaking Table Test ◽  
Coupling Effect ◽  
Soil Mass ◽  
Calculation Model ◽  
Shaking Table ◽  
Frame Structure ◽  
Dynamic Calculation ◽  
Concentrated Mass ◽  
Linear Spring

Based on the equivalent mass-spring model and considering the coupling effect between creep soil and prestressed anchors, the dynamic calculation model of prestressed anchors with frame structure is established. The soil mass is expressed in the form of concentrated mass. The action of the frame structure on the soil is treated as a parallel coupling of a linear spring and a linear damper, and the free section of the anchor is treated as a linear spring. Considering the creep characteristics, the soil is regarded as a Generalized Kelvin body and the anchoring section of the anchor is regarded as an equivalent spring body, which are coupled in parallel. Considering the effect of slope height, the dynamic calculation model is solved and the seismic response is analyzed. Finally, an engineering example is used to verify the calculation method in this paper, and the results are compared with the shaking table test and numerical simulation. It shows that the calculation model proposed in this paper is safe and reasonable for the seismic design and analysis of the slope supported by prestressed anchors with frame structure.

Study on Dynamic Calculation Method of Anti-Slide Pile

2014 ◽  
Vol 578-579 ◽  
pp. 402-406
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu
Keyword(s):  
Seismic Design ◽  
Analytical Solutions ◽  
Calculation Method ◽  
Seismic Analysis ◽  
Calculation Model ◽  
Dynamic Calculation ◽  
New Approach ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Prestressed Anchor

A dynamic calculation model of the pile supporting structure with single prestressed anchor for the slope is proposed in this paper. The motion equation of the pile-prestressed anchor is established and the analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with single prestressed anchor. The calculation model provides a new approach for earthquake analysis and seismic design of slope supported by pile supporting structure with pre-stress anchor.

Study of Seismic Design Method for Frame Supporting Structure with Prestressed Anchors

2011 ◽  
Vol 261-263 ◽  
pp. 1139-1144
Author(s):  
Jian Hua Dong ◽  
Wei Ma ◽  
Yan Peng Zhu
Keyword(s):  
Seismic Design ◽  
Design Method ◽  
Earth Pressure ◽  
Calculation Model ◽  
Dynamical Analysis ◽  
Dynamic Calculation ◽  
Engineering Project ◽  
Systematic Calculation ◽  
Supporting Structure ◽  
Seismic Design Method

Frame supporting structure with prestressed anchors is a new anchoring technology applied in slope reinforcement in recent years. Its dynamical analysis and seismic design is a big challenge, a set of systematic calculation methods can not be found for the time being. This paper shall first evaluate the calculation formula of anchoring slope earthquake earth pressure, then establish dynamic calculation model of frame supporting structure with prestressed anchors, solve using FORCE METHOD, finally apply the proposed method in engineering project. The result shows that this method is applicable to loess areas with uniform soil texture, providing the theoretical basis for seismic design of frame supporting with prestressed anchors.

scholarly journals Dynamic Optimization Research on the Section Morphology of Large-span Tunnels in Shallow Rock Mass

2015 ◽  
Vol 9 (1) ◽  
pp. 210-213 ◽  
Author(s):  
Wang Hui ◽  
Wang Qing-biao
Keyword(s):  
Optimization Design ◽  
Ground Surface ◽  
Calculation Model ◽  
Dynamic Calculation ◽  
Optimization Analysis ◽  
Large Span ◽  
Ground Surface Settlement ◽  
Set Up ◽  
Engineering Stability ◽  
Excavation Area

The optimization design of the section morphology of large-span tunnels plays an important role for saving cost and improving the engineering stability. The flat ratio of tunnel which is as an important control index, its rationality is the key problem in the design of tunnels. Program with Python to set up the dynamic calculation model of a large-span tunnel planned to be constructed which can be run and analyzed in ABAQUS. The MATLAB language is used to compile the optimization analysis program based on genetic algorithm, and then the dynamic calculation model is embedded into it. Using excavation area, plastic zone, ground surface settlement, vault subsidence, etc. as optimal objective to make dynamic analysis for the model and put forward the reasonable flat ratio of the supported project. The result of this paper provides reference for the section optimization design of similar tunnel engineering.

Study on Dynamic Calculation Method for Pile Supporting Structure with One Layer Prestressed Anchor

2011 ◽  
Vol 261-263 ◽  
pp. 1145-1150
Author(s):  
Yan Peng Zhu ◽  
Jian Hua Dong ◽  
Yong Zhou
Keyword(s):  
Seismic Design ◽  
Calculation Method ◽  
Seismic Analysis ◽  
Calculation Model ◽  
Response Analysis ◽  
Dynamic Calculation ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Earthquake Response Analysis ◽  
Prestressed Anchor

A dynamic calculation model of the pile supporting structure with one layer prestressed anchor for the slope is proposed in this paper. The prestressed anchor is regarded as the elastic support of the pile body. According to the theory of one-dimension elastic wave propagation, the interaction between the pile and the soil is obtained. Then the motion equation of the pile-prestressed anchor is established based on the dynamic interaction. The analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with one layer prestressed anchor. The calculation method provides a theoretical basis for earthquake response analysis and seismic design of the pile supporting structure with one layer prestressed anchor.

A fuzzy neural network approach for modeling the growth kinetics of FeB and Fe2B layers during the boronizing process

2018 ◽  
Vol 106 (6) ◽  
pp. 603 ◽  
Author(s):  
Bendaoud Mebarek ◽  
Mourad Keddam
Keyword(s):  
Neural Network ◽  
Experimental Data ◽  
Fuzzy Neural Network ◽  
Treatment Time ◽  
Calculation Model ◽  
Average Error ◽  
Network Approach ◽  
Neural Network Approach ◽  
Fuzzy Neural ◽  
Kinetics Of

In this paper, we develop a boronizing process simulation model based on fuzzy neural network (FNN) approach for estimating the thickness of the FeB and Fe2B layers. The model represents a synthesis of two artificial intelligence techniques; the fuzzy logic and the neural network. Characteristics of the fuzzy neural network approach for the modelling of boronizing process are presented in this study. In order to validate the results of our calculation model, we have used the learning base of experimental data of the powder-pack boronizing of Fe-15Cr alloy in the temperature range from 800 to 1050 °C and for a treatment time ranging from 0.5 to 12 h. The obtained results show that it is possible to estimate the influence of different process parameters. Comparing the results obtained by the artificial neural network to experimental data, the average error generated from the fuzzy neural network was 3% for the FeB layer and 3.5% for the Fe2B layer. The results obtained from the fuzzy neural network approach are in agreement with the experimental data. Finally, the utilization of fuzzy neural network approach is well adapted for the boronizing kinetics of Fe-15Cr alloy.

Development of the Partial Discharge Inception Calculation Model in a Non-uniform Air Gap Considering the Effect of Humidity

2011 ◽  
Vol 131 (12) ◽  
pp. 1017-1023 ◽  
Author(s):  
Norihito Yanagita ◽  
Tatsuro Kato ◽  
Toshiaki Rokunohe ◽  
Takeshi Iwata ◽  
Hiroki Kojima ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Calculation Model ◽  
Air Gap
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