Numerical Analysis Concerning the Harmfulness of Crack Turbine Rotors Using a Multi-Scale Approach Based on a Dynamic Finite Element Method

2014 ◽  
Vol 656 ◽  
pp. 315-324
Author(s):  
Anh Tuan Dau ◽  
Ionel Nistor ◽  
Adinel Gavrus
Keyword(s):  
Numerical Simulation ◽  
Finite Elements ◽  
3D Modeling ◽  
Fast Response ◽  
Industrial System ◽  
Multi Scale ◽  
Dynamic Finite Element ◽  
Numerical Tools ◽  
Healthy Part ◽  
Industrial Context

This work is placed in the context of the simulation of the behavior and the harmfulness of cracked rotors by Electricité de France (EDF) in order to evaluate its impact on the industrial system. Several numerical tools have been developed by the Research and Development Division of EDF and a feasibility study was conducted to prove its capacities to simulate the behavior of a rotor subject to a crack. Since the industrial context request fast response to such situation, the numerical simulation must be performed as quickly as possible. For this reason a multi-scale 1D-3D modeling has been proposed: the healthy part of the rotor is modeled by reduced Timoshenko beam finite elements since the part including the crack is modeled by 3D finite elements. The aim of the work is to prove the accuracy of this multi-scale approach, its feasibility and its CPU performance.

Multi-scale Numerical Simulation and 3D Modeling for Deep Mineral Exploration in the Jiaojia Gold District, China

2019 ◽  
Vol 29 (1) ◽  
pp. 415-438 ◽  
Author(s):  
Leilei Huang ◽  
Gongwen Wang ◽  
Emmanuel John M. Carranza ◽  
Jingguo Du ◽  
Junjian Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
3D Modeling ◽  
Mineral Exploration ◽  
Multi Scale

Development of Double-Action SPF Forming Process by Finite Element Simulation for A380 Part

2012 ◽  
Vol 735 ◽  
pp. 162-169 ◽  
Author(s):  
Gilles Marin ◽  
Fabien Nazaret ◽  
Olivier Barrau ◽  
Nicolas Guegan ◽  
Benoit Marguet ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Elements ◽  
3D Modeling ◽  
Thickness Distribution ◽  
Forming Process ◽  
Element Simulation ◽  
Rear Part ◽  
Forming Strategy ◽  
2D And 3D

The rear part of the APF A380 has a deep drawn shape. In order to develop the forming by SPF process of this part, numerical simulation by finite elements has been performed. Several configurations for 2D and 3D modeling were studied to determine an efficient forming strategy. A double-action solution was chosen. It ensures a satisfactory thickness distribution. This article will deal with the modeling assumptions, the results of individual cases of calculation and comparison with parts obtained at the Airbus plant.

Research on Propagation Numerical Simulation of Blast Shock Waves in Subway Station

2013 ◽  
Vol 380-384 ◽  
pp. 1725-1728
Author(s):  
Yang Hu ◽  
Huai Yu Kang
Keyword(s):  
Numerical Simulation ◽  
Shock Wave ◽  
Experimental Study ◽  
Shock Waves ◽  
Theoretical Basis ◽  
Damage Effect ◽  
Subway Station ◽  
Element Calculation ◽  
Dynamic Finite Element ◽  
Walking Pattern

In this paper, we Research on Propagation Numerical Simulation and damage effect of Blast Shock Waves in Subway Station by using LS-DYNA dynamic finite element calculation program , the results reproduce the formation process of the explosive flow field, and analysis the shock wave waveform, attenuation and walking pattern, provides the theoretical basis for further experimental study.

Nonlinear Dynamic Response of Buoys under the Collision Load with Ships

2012 ◽  
Vol 204-208 ◽  
pp. 4455-4459 ◽  
Author(s):  
Liu Hong Chang ◽  
Chang Bo Jiang ◽  
Man Jun Liao ◽  
Xiong Xiao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Analysis Software ◽  
Element Analysis ◽  
Nonlinear Dynamic Response ◽  
Dynamic Finite Element ◽  
Simulation Results ◽  
Collision Force ◽  
Explicit Dynamic ◽  
Element Theory

The explicit dynamic finite element theory is applied on the collision of ships with buoys for computer simulation. Using ANSYS/LS-DYNA finite element analysis software, the numerical simulation of the collision between the ton ship and the buoy with different structures and impact points. The collision force, deformation, displacement parameters and the weak impact points of a buoy are obtained. Based on the numerical simulation results, analysis of buoys and structural collision damages in anti-collision features are discussed, and several theoretical sugestions in anti-collision for the design of buoy are provided.

Dynamic Finite Element Analysis of a Cylindrical Roller Bearing

2011 ◽  
Vol 143-144 ◽  
pp. 437-442
Author(s):  
Bao Hong Tong ◽  
Yin Liu ◽  
Xiao Qian Sun ◽  
Xin Ming Cheng
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Roller Bearing ◽  
Element Analysis ◽  
Dynamic Finite Element ◽  
Dynamic Finite Element Analysis ◽  
Simulation Results ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

A dynamic finite element analysis model for cylindrical roller bearing is developed, and the complex stress distribution and dynamic contacting nature of the bearing are investigated carefully based on ANSYS/LS-DYNA. Numerical simulation results show that the stress would be bigger when the element contacting with the inner or outer ring than at other times, and the biggest stress would appear near the area that roller contacting with the inner ring. Phenomenon of stress concentration on the roller is found to be very obvious during the operating process of the bearing system. The stress distributions of different elements are uneven on the same side surface of roller in its axis direction. Numerical simulation results can give useful references for the design and analysis of rolling bearing.

Multi-scale numerical simulation of impact failure for cylindrical CFRP

2020 ◽  
Vol 30 (sup1) ◽  
pp. 19-38 ◽  
Author(s):  
Yusuke Sawamura ◽  
Yuta Yamazaki ◽  
Satoru Yoneyama ◽  
Jun Koyanagi
Keyword(s):  
Numerical Simulation ◽  
Impact Failure ◽  
Multi Scale

Numerical Simulation of Friction Stir Welding (FSW) Process Based on ABAQUS Environment

2016 ◽  
Vol 254 ◽  
pp. 272-277
Author(s):  
Monica Iordache ◽  
Claudiu Bădulescu ◽  
Eduard Niţu ◽  
Doina Iacomi
Keyword(s):  
Numerical Simulation ◽  
Friction Stir Welding ◽  
Finite Elements ◽  
Adaptive Mesh ◽  
Experimental Tests ◽  
Arbitrary Lagrangian Eulerian ◽  
Complex Issue ◽  
Friction Stir ◽  
Mechanical Phenomena

. Simulation of the FSW process is a complex issue, as it implies interactions between thermal and mechanical phenomena and the quality of the welding depends on many factors. In order to reduce the time of the experimental tests, which can be long and expensive, numerical simulation of the FSW process has been tried during the last ten years. However, there still remain aspects that cannot be completely simulated. In this paper the authors present the steps of the numerical simulation using the finite elements method, in order to evaluate the boundary conditions of the model and the geometry of the tools by using the Arbitrary Lagrangian Eulerian (ALE) adaptive mesh controls.

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