Details
| Original language | English |
|---|---|
| Article number | 107098 |
| Journal | Ocean engineering |
| Volume | 201 |
| Early online date | 5 Mar 2020 |
| Publication status | Published - 1 Apr 2020 |
Abstract
This work presents a comprehensive numerical study of the impact of aeration and hydroelasticity on slamming loads and structural response of elastic plates during a water entry event. A numerical tool is developed with OpenFOAM and validated against experimental data from available benchmark tests. An extensive parameter investigation revealed that the structural flexibility of a plate exerts a noticeable effect on slamming loads for pure water entry cases, which almost completely disappears when the water is aerated. The effect of aeration on slamming loads is quite significant. With only 0.5 % air fraction, aeration can reduce substantially the peak slamming forces, but as the load duration increases at the same time the force impulse remains almost constant. The structural response, in terms of strain rates, reacts directly on the hydrodynamic loads for stiff plates, and exhibits resonating effects and less influence on aeration levels at higher flexibilities. This suggests that the structural performance in a slamming event must be carefully considered, and is only directly related to loads for very stiff structures. For this purpose, a new functional relation between peak impact forces/pressures and impact velocity in the presence of aeration is suggested within the present study.
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Engineering(all)
- Ocean Engineering
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In: Ocean engineering, Vol. 201, 107098, 01.04.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Numerical investigation of the effect of aeration and hydroelasticity on impact loading and structural response for elastic plates during water entry
AU - Aghaei, A.
AU - Schimmels, S.
AU - Schlurmann, T.
AU - Hildebrandt, A.
N1 - Cited By :1 Export Date: 1 February 2021
PY - 2020/4/1
Y1 - 2020/4/1
N2 - This work presents a comprehensive numerical study of the impact of aeration and hydroelasticity on slamming loads and structural response of elastic plates during a water entry event. A numerical tool is developed with OpenFOAM and validated against experimental data from available benchmark tests. An extensive parameter investigation revealed that the structural flexibility of a plate exerts a noticeable effect on slamming loads for pure water entry cases, which almost completely disappears when the water is aerated. The effect of aeration on slamming loads is quite significant. With only 0.5 % air fraction, aeration can reduce substantially the peak slamming forces, but as the load duration increases at the same time the force impulse remains almost constant. The structural response, in terms of strain rates, reacts directly on the hydrodynamic loads for stiff plates, and exhibits resonating effects and less influence on aeration levels at higher flexibilities. This suggests that the structural performance in a slamming event must be carefully considered, and is only directly related to loads for very stiff structures. For this purpose, a new functional relation between peak impact forces/pressures and impact velocity in the presence of aeration is suggested within the present study.
AB - This work presents a comprehensive numerical study of the impact of aeration and hydroelasticity on slamming loads and structural response of elastic plates during a water entry event. A numerical tool is developed with OpenFOAM and validated against experimental data from available benchmark tests. An extensive parameter investigation revealed that the structural flexibility of a plate exerts a noticeable effect on slamming loads for pure water entry cases, which almost completely disappears when the water is aerated. The effect of aeration on slamming loads is quite significant. With only 0.5 % air fraction, aeration can reduce substantially the peak slamming forces, but as the load duration increases at the same time the force impulse remains almost constant. The structural response, in terms of strain rates, reacts directly on the hydrodynamic loads for stiff plates, and exhibits resonating effects and less influence on aeration levels at higher flexibilities. This suggests that the structural performance in a slamming event must be carefully considered, and is only directly related to loads for very stiff structures. For this purpose, a new functional relation between peak impact forces/pressures and impact velocity in the presence of aeration is suggested within the present study.
KW - Aeration
KW - Fluid–structure interaction
KW - Hydroelasticity
KW - Slamming
KW - Water entry
KW - Benchmarking
KW - Hydrodynamics
KW - Loads (forces)
KW - Plates (structural components)
KW - Slamming (ships)
KW - Strain rate
KW - Functional relation
KW - Hydrodynamic loads
KW - Numerical investigations
KW - Peak impact forces
KW - Structural flexibilities
KW - Structural performance
KW - Structural response
KW - Water aeration
KW - aeration
KW - computational fluid dynamics
KW - fluid-structure interaction
KW - hydrodynamic force
KW - hydroelasticity
KW - impact
KW - loading
KW - structural response
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85079646737&origin=inward&txGid=1af83b5d4a647581922ff8447664df67
U2 - 10.1016/j.oceaneng.2020.107098
DO - 10.1016/j.oceaneng.2020.107098
M3 - Article
VL - 201
JO - Ocean engineering
JF - Ocean engineering
SN - 0029-8018
M1 - 107098
ER -