Fully coupled analysis of consolidation by prefabricated vertical drains with applications of constant strain rate tests: Case studies and an open-source program

2020 ◽  
Vol 48 (3) ◽  
pp. 380-391 ◽  
Author(s):  
Hung Tien Pham ◽  
Wolfram Rühaak ◽  
Dong Huy Ngo ◽  
Oanh Cong Nguyen ◽  
Ingo Sass
Keyword(s):  
Strain Rate ◽  
Open Source ◽  
Case Studies ◽  
Constant Strain Rate ◽  
Coupled Analysis ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
Source Program ◽  
Fully Coupled ◽  
Fully Coupled Analysis

Fully Coupled Analysis of Ship Motion and Sloshing Tanks in Regular and Irregular Waves

2018 ◽  
Author(s):  
Yuan Zhuang ◽  
Decheng Wan
Keyword(s):  
Open Source ◽  
Ship Motion ◽  
Irregular Waves ◽  
Coupled Analysis ◽  
Regular Waves ◽  
Wave Condition ◽  
Sloshing Phenomenon ◽  
Fully Coupled ◽  
Fully Coupled Analysis ◽  
External Wave

Fully coupled analysis of ship motion and sloshing tank in waves is essential for floating structures which store and transports natural gas. For partially filled tanks would generate violent sloshing due to external wave excitation, and the sloshing flow can consequently affect ship motion. Therefore, how to evaluate ship motion and sloshing phenomenon in tank is of great importance, especially under real sea state, when wave induced sloshing would be more complex than that under linear wave condition. In the present work, a CFD-based method is applied to simulate both external wave field and inner sloshing tank field in regular waves and irregular waves. The ship is a simplified FPSO, with two LNG tanks. All the numerical simulations are carried out by the in-house CFD code naoe-FOAM-SJTU, which is developed on the open source platform OpenFOAM. The regular and irregular wave condition is simulated based on open source toolbox waves2Foam. The main parameters of coupling effect of ship motion and sloshing tank, such as the time history of ship motion, sloshing phenomenon in tanks are obtained by our computations. The predicted results for the coupling effects of ship motion and sloshing tank in regular waves are compared with the corresponding experimental data. The comparison is satisfactory and shows that the CFD method has the ability to simulate coupling effects of ship motion and sloshing tank in waves.

Vortex Induced Vibration Analysis of a Complex Subsea Jumper

2010 ◽  
Author(s):  
Samuel Holmes ◽  
Yiannis Constantinides
Keyword(s):  
Complex Shape ◽  
Coupled Analysis ◽  
Eigenvalues And Eigenvectors ◽  
Element Analysis ◽  
Vortex Induced Vibration ◽  
Sea Floor ◽  
Curved Pipe ◽  
Design Analyses ◽  
Fully Coupled ◽  
Fully Coupled Analysis

Jumpers are typically short sections of curved pipe spanning production riser elements on the sea floor. When in areas of significant currents these jumpers are subject to vortex induced vibration (VIV). The complex shape of the jumper means that numerical methods are usually needed to solve for the vibration modes of the jumper. Furthermore, the fluid flow around the jumper is also complex so that traditional methods of VIV analysis used for risers are not applicable to jumpers. Here we use a CFD code in a fully coupled analysis to predict vibration response and strain of a typical subsea jumper. A separate finite element analysis is used to calculate the eigenvalues and eigenvectors of the jumper system for input into the CFD analysis. The resulting method is economical and practical for design analyses.

scholarly journals A Fully Coupled Analysis of Fluid Flow, Heat Transfer and Stress in Continuous Round Billet Casting.

1999 ◽  
Vol 39 (5) ◽  
pp. 435-444 ◽  
Author(s):  
Jung-Eui Lee ◽  
Heung Nam Han ◽  
Kyu Hwan Oh ◽  
Jong-Kyu Yoon
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Coupled Analysis ◽  
Round Billet ◽  
Flow Heat ◽  
Fully Coupled ◽  
Fully Coupled Analysis

Invariom modeling of disordered structures: case studies on a dipeptide, an amino acid, and cefaclor, a cephalosporin antibiotic

2016 ◽  
Vol 231 (12) ◽  
Author(s):  
Birger Dittrich ◽  
Christian Schürmann ◽  
Christian B. Hübschle
Keyword(s):  
Amino Acid ◽  
Open Source ◽  
Case Studies ◽  
Disordered Structures ◽  
Open Source Program ◽  
Source Program ◽  
Cephalosporin Antibiotic

AbstractRoutines to facilitate the treatment of disorder in invariom modeling have been implemented in the open-source program M

Elastoplastic numerical approach for predicting the electro-osmotic consolidation behaviour of soft clays

2013 ◽  
Vol 50 (12) ◽  
pp. 1219-1235 ◽  
Author(s):  
V. Jeyakanthan ◽  
C.T. Gnanendran
Keyword(s):  
Numerical Approach ◽  
Coupled Analysis ◽  
Soft Clays ◽  
Strain Behaviour ◽  
Nonlinear Stress ◽  
Modified Cam Clay ◽  
Close Form ◽  
Fully Coupled ◽  
Fully Coupled Analysis ◽  
Cam Clay

A finite element (FE) formulation for electro-osmotic consolidation (EOC) analysis is developed in this paper which was implemented in a FE analysis (FEA) program. This formulation is integrated with the elastoplastic Modified Cam Clay (MCC) model to capture the nonlinear stress–strain behaviour of the soil during EOC using the fully coupled analysis approach. The numerical model is verified against triaxial EOC test data and close form solutions of typical one-dimensional EOC problems. Details of the formulation and the results of the validation analyses are reported in this paper.

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