Finite element analysis for the unsteady nearshore circulation due to wave-current interaction (I)—numerical model

1994 ◽  
Vol 15 (8) ◽  
pp. 749-754 ◽  
Author(s):  
Wu Wei-xiong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Element Analysis ◽  
Nearshore Circulation ◽  
Current Interaction

Modeling the Static Behaviour of a Double Curvature Brickwork Vault

2010 ◽  
Vol 133-134 ◽  
pp. 367-372 ◽  
Author(s):  
Anna Anzani ◽  
Paola Condoleo ◽  
Antonia Gobbo ◽  
Alberto Taliercio
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Safety Assessment ◽  
Crack Pattern ◽  
Element Analysis ◽  
3D Finite Element ◽  
Double Curvature ◽  
Static Behaviour ◽  
Hollow Bricks

For safety assessment, a double curvature hollow bricks cloister vault with lunettes has been studied. Its geometry, constructive aspects, crack pattern have been surveyed and a 3D finite element analysis has been carried out, the numerical model exploiting the accurate survey of the vault geometry.

A Finite Element Analysis for Unbonded Flexible Risers Under Torsion

2007 ◽  
Author(s):  
A. Bahtui ◽  
H. Bahai ◽  
G. Alfano
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Finite Element Model ◽  
Time Integration ◽  
Element Model ◽  
Integration Scheme ◽  
Element Analysis ◽  
Benchmark Solutions ◽  
The Finite Element Model

This paper presents a detailed finite element analysis of a five-layer unbonded flexible riser. The numerical results are compared analytical solutions for various load cases. In the finite element model all layers are modelled separately with contact interfaces placed between each layer. The finite element model includes the main features of the riser geometry with very little simplifying assumptions made. The numerical model was solved using a fully explicit time-integration scheme implemented in a parallel environment on a 16-processor cluster. The very good agreement found from numerical and analytical comparisons validates the use of our numerical model to provide benchmark solutions against which further detailed investigation will be made.

Finite Element Analysis of Woodball Mallet during Swing Stage

2012 ◽  
Vol 433-440 ◽  
pp. 5050-5052
Author(s):  
Yi Chen Lu ◽  
Yao Dong Gu
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Proximal Part ◽  
Head Part ◽  
Element Analysis ◽  
Solid Models ◽  
The Finite Element Analysis ◽  
Maximal Stress

This study aims to analyze the relevant mechanical properties of woodball shafts by applying numerical methods. The structures of woodball were constructed in Solidworks 2007 to form the solid models, and the numerical model was analyzed in ABAQUS to acquire the simulation resluts. The collision speed between ball and mallet was from the experiment of motion analysis. As the maximal stress of mallet was concentrated in the proximal part of bottle, some enforcement design could be carried out in this part to reduce the fracture incidence. Another important finding is the contact area at the mallet head was really small, the rubber cover at head part may thicken at the centre part and thinner at the outside area. For further study, it is important to represent the higher fidelity of the input conditions for the finite element analysis (FEA).

Unsteady Analysis of a Mechanical Seal Using Duhamel’s Method

2004 ◽  
Vol 127 (3) ◽  
pp. 623-631 ◽  
Author(s):  
Richard F. Salant ◽  
Bin Cao
Keyword(s):  
Thermal Analysis ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Numerical Experiment ◽  
Auxiliary Function ◽  
Mixed Lubrication ◽  
Mechanical Seal ◽  
Element Analysis ◽  
Semiempirical Approach

An unsteady numerical model of a mechanical seal, with mixed lubrication, has been developed. The thermal analysis is performed using Duhamel’s method in combination with a numerical experiment to determine Duhamel’s auxiliary function. The results using this semiempirical approach compare well with those from a finite element analysis. The model has been used to predict the performance of a mechanical seal during startup and shutdown.

scholarly journals Finite Element Analysis of the Effect of Currents on the Dynamics of a Moored Flexible Cylindrical Net Cage

2021 ◽  
Vol 9 (2) ◽  
pp. 159
Author(s):  
Zhongchi Liu ◽  
Sarat Chandra Mohapatra ◽  
C. Guedes Soares
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Analytical Model ◽  
Structural Response ◽  
Wave Theory ◽  
Design Parameters ◽  
Element Analysis ◽  
Net Cage ◽  
Comparison Of The Results

A numerical model associated with wave–current interactions with a moored flexible cylindrical cage was developed based on the finite element method. An analytical model was formulated under the linearised wave theory and small structural response, and a semi-analytical solution was obtained using the Fourier Bessel series solution and least squares approximation method, along with a matching technique. The numerical results from the finite element analysis of the horizontal displacements for different design parameters under a uniform current were compared with the analytical model solutions. It was seen that they had a good level of agreement with their results. The effects of different current speeds and time on the cage shapes were analysed from the finite element results. Further, the mooring forces on the flexible cage for different values of the cage height and cage radius were also presented. The comparison of the results indicated that the numerical model results could be used with confidence in the design of a flexible cylindrical net cage for applications to offshore aquacultures.

Numerical Model of Cold Press-Formed Square Steel Tube Columns Considered with Degradation Behavior due to Local Buckling and/or Fracture

2018 ◽  
Vol 763 ◽  
pp. 533-540
Author(s):  
Yuji Koetaka ◽  
Koichi Taniguchi ◽  
Iathong Chan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Local Buckling ◽  
Steel Tube ◽  
Degradation Behavior ◽  
Loading Test ◽  
Element Analysis ◽  
Cold Press ◽  
Square Steel Tube

In steel building structures, local buckling and/or fracture of columns could occur during strong ground motions, furthermore complete collapse might be induced due to the column strength degradation. In this paper, cold press-formed square tube columns are targeted, and numerical model being able to trace precisely degradation behavior is proposed. In order to take account of both local buckling and fracture with low computational costs, multi-spring model which consists of some uni-axial springs is adopted. Axial force-deformation relationships of uni-axial springs are provided on flat area and corner area of square tube severally, and are separated into skeleton part and hysteresis part. All parameters on force-deformation relationship are identified based on finite element analysis results of short columns under monotonic or cyclic axial loading. Comparing between analysis results by multi-spring models and past cyclic loading test results or finite element analysis results, it is clarified that degradation behavior of cold press-formed square steel tube columns can be traced with high accuracy.

scholarly journals STRUCTURAL ANALYSIS OF THE PELVIC GIRDLE BEFORE AND AFTER HIP REPLACEMENT PROCEDURE

2018 ◽  
Vol 17 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Ja. Zubrzycki ◽  
R. Karpinski ◽  
L. Jaworski ◽  
A. M. Ausiyevich ◽  
N. Smidova
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Analysis ◽  
Numerical Model ◽  
Hip Joint ◽  
Hip Replacement ◽  
Mechanical Analysis ◽  
Element Analysis ◽  
Replacement Procedure ◽  
Before And After

The paper presents the results of a preliminary study on the structural analysis of the pelvic girdle, comparing results for the analysis performed before and after the hip replacement procedure with taking into account changes in the mechanical properties of the articular cartilage of the joint. Basic anatomy and biomechanics of the hip joint is introduced. The mechanical analysis of the hip joint model in each case is conducted. Final results of analysis are presented. The numerical model of the tested objects was made on the basis of CT and CAD modeling. Hip bone models were made using specialist software such as Materialise Mimics. The model is made in the program was then exported to a data exchange file in order to obtain the editable CAD files. Thus obtained models were the starting point for the implementation of the numerical model of personalized hip replacement. Numerical models of bone and implant were performed in Solidworks environment.Mechanical analysis was carried out using finite element analysis. During performing of calculations with the use of finite element analysis other physical quantities are also being discretized: loads, tensions, restraints or other examples represented in the system with the use of continuous function. While performing the process of discretization software aims at maximally approximation of discreet and continuous form using approximation methods.

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