Study of the lift effect on wind load estimation for a semi-submersible rig using the maritime atmospheric boundary layer model

Yeon, Seong Mo; Kwon, Chang Seop; Kim, Yoo-Chul; Kim, Kwang S.

doi:10.1016/j.ijnaoe.2021.11.002

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…The Reynolds model [44] can cause significant problems with computation convergence, and the computation process is prolonged. On the other hand, the k-ω model [45][46][47] demands creating a special mesh of finite cells at the stationary boundaries, which consists of very small elements. Consequently, it causes the number of cells, nodes, and degrees of freedom to be significantly large.…”

Section: Cfd Simulation Scaled Sectional Modelsmentioning

confidence: 99%

Estimation of the Wind Load Required to Cause the Overturning of a Gantry Crane, Comparing Different Structures of the Main Horizontal Girder

Augustyn,

Barski

2024

Applied Sciences

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The present paper concerns the problem of estimating the loading induced by the wind on a gantry crane standing in the open air. Sufficiently strong wind may cause the device to move or even tip over. Two different structures were studied, namely the box girder and truss girder. At the very beginning, the two sectional scaled parts of the main horizontal beam (box and truss girder) of the gantry were prepared. Next, experimental analysis using these models was carried out in an aerodynamic tunnel to estimate the horizontal forces induced by the airflow acting on them. The experimental values of the aerodynamic forces were exploited to verify the 3D computational model of the studied structure. Numerical computations were carried out using the ANSYS Fluent 2022R2 system for both sectional models of the gantry crane mentioned above. The standard k-epsilon model of the turbulent flow of the air is employed. Satisfactory agreement of the values between the experimental and numerical results was achieved. As a result of the performed computations, the magnitude of the critical wind velocity that can be dangerous for the studied gantry cranes was estimated. Finally, a model of the gantry crane with box girder at full scale was analyzed using CFD simulations for different Davenport wind profiles. The results obtained from the experimental and numerical analysis of the sectional models were compared with the appropriate standards. In the current work, attention is drawn to the importance of changing wind direction in the vertical plane since, as shown in the results of this work, even a small change in vertical angle, up to 6°, causes significant changes in the value of the force required to overturn the gantry crane.

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Section: Cfd Simulation Scaled Sectional Modelsmentioning

confidence: 99%

Estimation of the Wind Load Required to Cause the Overturning of a Gantry Crane, Comparing Different Structures of the Main Horizontal Girder

Augustyn,

Barski

2024

Applied Sciences

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“…The first model, used by Wu et al [40], causes the computations to converge unacceptably slowly. The second model, used by He et al [33], Yeon et al [34], and Monteiro et al [36], requires preparing a specific mesh at the boundary conditions. In the estimation made for the studied structure using a special calculator available online [59], the first layer of the finite volume should be about 10 × 10 −5 m in height.…”

Section: Cfd Simulationmentioning

confidence: 99%

“…To avoid sophisticated finite element analysis of the main building, a modified generalized flexural-shear model (FSM-MS) was proposed to estimate the along-wind and across-wind displacement responses of the main building and the responses at the connection support of the tower crane. Yeon et al [34] studied the lift effect on wind load estimation for a semi-submersible rig. Wind loads on the analyzed rig were calculated under the maritime atmospheric boundary layer.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Estimation of the Aerodynamic Forces Induced by the Wind Acting on a Fast-Erecting Crane

Augustyn,

Barski,

Chwał

et al. 2023

Applied Sciences

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The current work concerns the problem of estimating the aerodynamic forces and moments induced by the wind on the fast-erecting 63K crane by Liebherr. In the first step, scaled sectional models of the tower truss and horizontal jib truss are prepared for experimental analysis in an aerodynamic tunnel. Next, the aerodynamic forces and moments are measured in the aerodynamic tunnel. It is assumed that the direction of the wind changes from 0° to 180° in 15° steps for both of the studied sectional models. The experimental tests are carried out for two levels of turbulence intensity. In the case of the model of the vertical part of the studied crane, the turbulence intensities are assumed to be equal to 3% and 9%. In the case of the horizontal crane jib, they are 3% and 12%, respectively. In the second step, a CFD analysis is performed with the use of Ansys Fluent R22 software. The standard k-ε model with a standard wall function of the turbulent flow is utilized. The airflow around the studied structures is modeled with the use of polytetrahedral cells. A relatively good agreement between the numerical and experimental results is observed. The obtained values are compared to the appropriate standard, namely PN-ISO 4302.

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Numerical and Experimental Determination of the Wind Speed Value Causing Catastrophe of the Scissor Lift

et al. 2023

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The current work is devoted to the numerical determination of the wind speed value, which can cause the overturning of the mobile elevating work platform of the scissor lift type. In the first step of the analysis, the scaled model of the real vehicle is prepared. In the second step, the model is used in the aerodynamic tunnel to determine the aerodynamic force values and moment, which act on the vehicle. The three different configurations of the work platform are considered, namely: (a) The work platform raised to the maximum height with an additional bridge extended, (b) the work platform raised to the maximum height, and (c) the work platform half raised. In each position, the direction of the wind is changed from the range from 0° to 180° with an increment equal to 15°. In the next step of the analysis, the CFD simulations are carried out. The ANSYS Fluent R22 software is used. As a model of turbulent airflow, the standard k-ε with standard wall function is adopted. The obtained experimental results are used to verify the numerical model. A very good agreement between the results of the experiment and the results of numerical simulations is obtained. As the main result of the numerical study, the values of the tipping moment and corresponding wind speed that cause the overturning of the analyzed real scissor lift are determined. It occurred that the lowest value of the wind speed is obtained for the first variant of the vehicle configuration V1crt = 22.315 m/s for the angle of the wind speed direction β = 30° and the highest one for the third variant V3crt = 34.534 m/s and β = 15°, without any persons on the work platform. The presence of human beings on the work platform is also considered.

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Study of the lift effect on wind load estimation for a semi-submersible rig using the maritime atmospheric boundary layer model

Cited by 4 publications

References 11 publications

Estimation of the Wind Load Required to Cause the Overturning of a Gantry Crane, Comparing Different Structures of the Main Horizontal Girder

Estimation of the Wind Load Required to Cause the Overturning of a Gantry Crane, Comparing Different Structures of the Main Horizontal Girder

Experimental and Numerical Estimation of the Aerodynamic Forces Induced by the Wind Acting on a Fast-Erecting Crane

Numerical and Experimental Determination of the Wind Speed Value Causing Catastrophe of the Scissor Lift

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