Increasing precision in burring process of large diameter steel pipe by finite element method

2019 ◽  
Vol 2019.27 (0) ◽  
pp. 401
Author(s):  
Daichi UEMATSU ◽  
Kyohei OGAWA ◽  
Naoki IKEDA ◽  
Shinichi NISHIDA ◽  
Yutaka SATO
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Large Diameter ◽  
Steel Pipe ◽  
Element Method

A Reverse Approach in Optimizing Pass Parameters

2010 ◽  
Vol 113-116 ◽  
pp. 1707-1711
Author(s):  
Jian Hua Hu ◽  
Yuan Hua Shuang
Keyword(s):  
Neural Networks ◽  
Finite Element Method ◽  
Finite Element ◽  
Learning Process ◽  
Back Propagation ◽  
Fem Simulation ◽  
Steel Pipe ◽  
Good Convergence ◽  
Back Propagation Neural Networks ◽  
Element Method

A method combines a back propagation neural networks (BPNN) with the data obtained using finite element method (FEM) is introduced in this paper as an approach to solve reverse problems. This paper presents the feasibility of this approach. FEM results are used to train the BPNN. Inputs of the network are associated with dimension deviation values of the steel pipe, and outputs correspond to its pass parameters. Training of the network ensures low error and good convergence of the learning process. At last, a group of optimal pass parameters are obtained, and reliability and accuracy of the parameters are verified by FEM simulation.

The Analysis of Stratum Settlement for a Large Diameter Slurry Shield Obliquely Under-Passing Embankment of the Yangtze River

2014 ◽  
Vol 919-921 ◽  
pp. 895-901 ◽  
Author(s):  
Zhou Yun Jiang ◽  
Jie Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Yangtze River ◽  
Large Diameter ◽  
Three Dimensional ◽  
The Yangtze River ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Slurry Shield ◽  
Element Method

Displacement caused by tunnel excavation soil may cause the deformation of the buildings or structures nearby and even cause disaster. On the background of a large diameter slurry shield obliquely Under-passing embankment of The Yangtze River. First of all, three dimensional finite element method is used to make a dynamic analysis of the embankment settlement. And the result is compared with the measured values, the accuracy of the finite element method was verified. Then, the stratum settlement of embankment is analyzed under different cross Angle and depth of tunnel. Some useful conclusions are drawn, which can provide some useful reference for similar engineering of tunnel under-passing embankment.

ANALYSIS OF RESIDUAL STRESS FOR NARROW GAP WELDING USING FINITE ELEMENT METHOD

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2797-2802 ◽  
Author(s):  
CHOON YEOL LEE ◽  
JAE KEUN HWANG ◽  
JOON WOO BAE
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Nuclear Power ◽  
Power Plants ◽  
Large Diameter ◽  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Welding Processes ◽  
Element Method

Reactor coolant loop (RCL) pipes circulating the heat generated in a nuclear power plant consist of so large diameter pipes that the installation of these pipes is one of the major construction processes. Conventionally, a shield metal arc welding (SMAW) process has been mainly used in RCL piping installations, which sometimes caused severe deformations, dislocation of main equipments and various other complications due to excessive heat input in welding processes. Hence, automation of the work of welding is required and narrow-gap welding (NGW) process is being reviewed for new nuclear power plants as an alternative method of welding. In this study, transient heat transfer and thermo-elastic-plastic analyses have been performed for the residual stress distribution on the narrow gap weldment of RCL by finite element method under various conditions including surface heat flux and temperature dependent thermo-physical properties.

scholarly journals FINITE ELEMENT METHOD ANALYSIS ON MECHANICAL BEHAVIOR OF EXISTING CAISSON FOUNDATION REINFORCED BY STEEL PIPE SHEET PILES

2007 ◽  
Vol 63 (2) ◽  
pp. 516-529 ◽  
Author(s):  
Koichi ISOBE ◽  
Makoto KIMURA ◽  
Feng ZHANG ◽  
Kenji KOHNO ◽  
Noriyoshi HARATA ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Steel Pipe ◽  
Finite Element Method Analysis ◽  
Method Analysis ◽  
Element Method

scholarly journals Performance Evaluation of a Stator Modular Ring Generator for a Shrouded Wind Turbine

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 67
Author(s):  
Jefferson A. Oliveira ◽  
Ály F. Flores Filho
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Performance Evaluation ◽  
Wind Turbine ◽  
Power Conversion ◽  
Large Diameter ◽  
Experimental Measurements ◽  
Copper Loss ◽  
Good Agreement ◽  
Element Method

This paper presents the performance evaluation of a stator modular ring permanent-magnet generator to be embedded in a shrouded wind turbine. That is done to increase the power conversion for the same turbine area when compared to more conventional ones. An adapted structure allows the assembling of the prototype, aiming to verify its performance under controlled conditions. Aiming to verify the accuracy of an analytical subdomain model for a large diameter machine, the evaluation compares the results obtained by the electromagnetic finite element method and experimental measurements. The results of the components of the air-gap flux density, back EMF and electromagnetic torque obtained by the proposed analytical model and finite-element method are in good agreement with the experimental measurements. The experimental measurements of the iron loss and copper loss show that the prototype efficiency can reach 90% approximately.

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