Transient response of a ship to an abrupt flooding accounting for the momentum flux

Manderbacka, Teemu; Mikkola, Tommi; Ruponen, Pekka; Matusiak, Jerzy

doi:10.1016/j.jfluidstructs.2015.06.001

Cited by 47 publications

(31 citation statements)

References 20 publications

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“…This method has the advantage of dealing with large deformation problems of free surface flow and fluid-structure interaction. In addition, Manderbacka et al [17] and Acanfora et al [18] presented a non-linear time domain simulation method for damaged ships. The flooding water motion is based on the lumped mass method with a moving free surface, and the ship's transient response to an abrupt flooding is simulated.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation into the Effect of Damage Openings on Ship Hydrodynamics by the Overset Mesh Technique

Zhang

Lin

Mancini

et al. 2019

JMSE

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Damage stability is difficult to assess due to the complex hydrodynamic phenomena regarding interactions between fluid and structures. Therefore, a detailed analysis of the flooding progression and motion responses is important for improving ship safety. In this paper, numerical simulations are performed on the damaged DTMB 5415 ship at zero speed. All calculation are carried out using CD Adapco Star CCM + software, investigating the effect of damage openings on ship hydrodynamics, including the side damage and the bottom damage. The computational domain is modelled by the overset mesh and solved using the unsteady Reynold-average Navier-Stokes (URANS) solver. An implicit solver is used to find the field of all hydrodynamics unknown quantities, in conjunction with an iterative solver to solve each time step. The Volume of Fluid (VOF) method is applied to visualize the flooding process and capture the complex hydrodynamics behaviors. The simulation results indicated that two damage locations produce the characteristic flooding processes, and the motion responses corresponding to the hydrodynamic behaviors are different. Through comparative analysis, due to the difference between the horizontal impact on the longitudinal bulkhead and the vertical impact on the bottom plate, the bottom damage scenario always has a larger heel angle than the side damage scenario in the same period. However, the pitch motions are basically consistent. Generally, the visualization of the flooding process is efficient to explain the causes of the motion responses. Also, when the damage occurs, regardless of the bottom damage or the side damage, the excessive heel angle due to asymmetric flooding is often a threat to ship survivability with respect to the pitch angle.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation into the Effect of Damage Openings on Ship Hydrodynamics by the Overset Mesh Technique

Zhang

Lin

Mancini

et al. 2019

JMSE

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“…Through the comprehensive analysis of the above simulation results, it can be found that the transient response of a ship to an abrupt flooding is dangerous. A numerical non-linear time domain simulation based on the lumped mass method [11] and an enhanced smoothed particle hydrodynamics (SPH) model were developed to investigate the response of a damaged ship under the condition of transient flooding water [12][13][14][15]. These numerical simulation methods have been proven to provide convenience and reliability for flooding research.…”

Section: Introductionmentioning

confidence: 99%

Time Domain Simulation of Damage Flooding Considering Air Compression Characteristics

Zhang¹,

Lin²,

Li³

et al. 2019

Water

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An accurate analysis of the entire flooding process is critical to assess the damaged stability when a ship encounters distressed accidents such as collision, stranding, or grounding. Among many factors affecting the flooding process and damaged stability, the complex effect of air compression is significant and worthy of further research. In this paper, through establishing scenarios of the damage flooding for a cruise ship, the commercial software CD Adapco STARCCM+ is applied to perform time domain simulation of flooding processes under different ventilation levels. The basic mathematical models about air compression and specific simulation settings of computational fluid dynamics (CFD) are presented in detail. The simulation results show that water ingression results in an increase of air pressure and density inside the flooded compartment. The corresponding air compression can significantly delay the flooding process if the ventilation level is limited to a certain ratio. Finally, the stability of the damaged ship is affected.

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“…Developing fast numerical simulation tools, capable of modelling water dynamics inside a compartment, is a state of the art challenge. Some of them are based on the lumped mass approach [14]; some of them are based on shallow water equations [15,16]. In [17,18], the so-called quasi-static approach was introduced as the coupling of the equations of motions of a flooded ship in waves with the floodwater, characterized by a flat free surface, moving in phase with the ship.…”

Section: Introductionmentioning

confidence: 99%

A Fast Simulation Method for Damaged Ship Dynamics

Acanfora

Begović

Luca

2019

JMSE

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Ship accidents that entail flooding may lead to disastrous consequences which could be avoided or mitigated based on the knowledge of damaged ship dynamics. The dynamic behaviour of a damaged hull is a complex phenomenon involving the interaction of the flooded water and the ship motions. The presence of a damage opening allows water flow into and out from the compartment, which further complicates the mathematical description of the problem. A fast simulation method, based on the lumped mass approach, is developed and presented. The lumped mass path in space depends on free-surface inclinations that differ from the ship angles of the roll and pitch. The viscous effects in the floodwater dynamics are implemented based on the model for the dissipation of the energy of standing waves in rectangular rooms. The method applies to both the transient stage of flooding and to the dynamic behaviour of a flooded ship in regular waves. In the first case, viscous effects are implemented considering the water in the compartment variable with time. Several case studies are carried out on three different hull models: Transient stage of flooding, roll decay of the damaged hull, and steady state responses in waves are simulated and compared with available experimental data.

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Transient response of a ship to an abrupt flooding accounting for the momentum flux

Abstract: Numerical non-linear time domain simulation method for damaged ship motions is presented. Floodwater motion modelling is based on the lumped mass method with a moving free surface.

Cited by 47 publications

References 20 publications

Numerical Investigation into the Effect of Damage Openings on Ship Hydrodynamics by the Overset Mesh Technique

Numerical Investigation into the Effect of Damage Openings on Ship Hydrodynamics by the Overset Mesh Technique

Time Domain Simulation of Damage Flooding Considering Air Compression Characteristics

A Fast Simulation Method for Damaged Ship Dynamics

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