Related references
Note: Only part of the references are listed.
Article
Mechanics
Wen-Tao Liu et al.
Summary: A novel fluid-structure interaction (FSI) scheme based on the immersed boundary method is proposed to study high-speed water entry of slender bodies. The FSI scheme effectively suppresses non-physical force oscillation and describes rigid body motion using a quaternion-based six degrees of freedom motion system. The accuracy and robustness of the FSI scheme are validated using analytical solutions, experimental data, and literature data. The hydrodynamic loads and motion trajectory of different nose configurations are extensively discussed, with a focus on the tail slamming phenomenon.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Marine
Zhenwei Chen et al.
Summary: The fluid-structure interaction problem and slamming loads on a wedged grillage structure falling into 5th order Stokes wave under gravity effect were investigated using a partitioned CFD-FEM two-way coupled numerical method. Verification and validation of the numerical method were conducted using calm water entry results, showing its feasibility and reliability. The study also explored the slamming loads and structural stresses on the wedge, considering hydroelasticity effects, and investigated the influence of horizontal and rotational motions on the water wave entry results. This research provides insights into ship hull structure impact with sea waves and is valuable for design and assessment.
Article
Mechanics
Shengsheng Xia et al.
Summary: A numerical simulation based on a collaborative simulation method is conducted to systematically study the cavity evolution, hydrodynamic characteristics, and structural response of a semi-sealed cylindrical shell during high-speed vertical water entry. The results indicate the formation of a nested cavity with three different morphologies as the shell penetrates the water. Additionally, a jet is generated under the shell, which has a profound influence on the hydrodynamic and structural behavior. Compared to the completely sealed case, the semi-sealed cylindrical shell experiences significant changes in velocity, displacement, and deformation at the top wall during water entry.
Article
Engineering, Marine
Geng Zhao et al.
Summary: In this study, high-speed photography technique was used to examine the high-speed oblique water entry of truncated cone projectiles, and the impact of nose shape, projectile velocity, and entry angle on the characteristics of the entry cavity and ballistics was investigated. The results showed that the influence of nose shape on the cavity and ballistics is related to the wetted area of the nose. For projectiles of the same type, as the velocity increases, the cavity size becomes larger at the same penetration displacement and the surface closure time increases. Additionally, an increase in the entry angle leads to a decrease in surface closure time, faster velocity attenuation, shorter cavity opening length, and weaker cavity asymmetry. The trajectory stability of the truncated cone projectile varied with different water entry velocities and attitude angles.
Article
Engineering, Marine
Huifei Ren et al.
Summary: A three-dimensional numerical model of ice-water-structure interaction is developed in this study to simulate the ice breaking and water entry of rigid spheres. The results show good agreement between the numerical and experimental results for water-entry cavity evolution and sphere motion, as well as for the shape and number of cracks during the interaction between a sphere and the ice cover.
Article
Mechanics
Yu-Tong Sui et al.
Summary: This study reports on an experimental investigation of the trajectories of truncated cone projectiles during water entry. The stability of the water entry trajectory is crucial for projectile motion control. It is found that the wetted surface of the projectile's nose plays a significant role in trajectory stability. The study systematically quantifies the relationship between trajectory stability and nose parameters, providing important insights for future design considerations.
Article
Engineering, Multidisciplinary
Cheng Chen et al.
Summary: This work presents a multi-resolution fluid-structure interaction solver for hydroelastic issues, combining the WCSPH method and the FEM method. The solver accurately models the coupled force between the fluid and structure and has been rigorously validated on various benchmark problems.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Marine
Dongni Yan et al.
Summary: This paper presents a systematic comparison between fluid structure interaction simulations and experiments on flat water plate entry. It focuses on hydroelasticity, air trapping effects, quantification of uncertainties, and the validity of modeling assumptions. The results show that pressures and strains may be affected by spatial effects, resulting in minor deviations between experiments and simulations.
Article
Engineering, Marine
Zhenpeng Liu et al.
Summary: This paper investigates the buffering and load reduction configuration for a large-scale vehicle entering water at high speed. The numerical model and modal analysis are used to analyze the dynamic characteristics and deformation of the vehicle during water entry with a head cap.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Ocean
Ahmad Zamir Chaudhry et al.
Summary: This paper numerically investigates the dynamic behavior of flat faced deformable AUV subjected to hydroelastic water entry impact using Arbitrary Lagrangian Eulerian (ALE) method. Experimental validation is conducted on a 200 mm diameter flat faced AUV head section in a water tank, comparing impact accelerations and underwater cavity evolution. The study reveals that the hydroelastic effect increases with decreasing rigidity of the structure, and discusses the influence of various initial conditions on hydrodynamic load and impact pressure for deformable AUVs. The findings are crucial for selecting AUV rigidity and understanding the impact of hydroelasticity for flat faced AUVs.
APPLIED OCEAN RESEARCH
(2021)
Article
Mechanics
Hashem Moradi et al.
Summary: A hydroelastic hybrid model is developed to simulate fluid-structure interaction in water entry problems, combining an extended Wagner's model to overcome numerical instability associated with the fluid added mass. The model is stable, accurate, and simple to implement, and can be extended to more complex structures.
Article
Engineering, Mechanical
Guiyong Zhang et al.
Summary: This study investigates fluid-structure interaction problems using the delta SPH-SPIM coupled method, which combines the advantages of SPIM and delta SPH. A new interpolation scheme is proposed for force calculation and transfer, allowing for flexible spacing between fluid and solid components.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Engineering, Marine
Yu Hou et al.
Summary: The study focused on the vertical water-entry processes of a hollow cylinder with three different velocities, revealing different closure patterns and flow characteristics of the air-entraining cavities. As the entry velocity increased, three different closure patterns and three high-speed regions appeared, each with unique characteristics. Despite velocity variations shifting from increase to decrease with the increase of water entry velocity, the water depths linearly increased due to short time and small variations in velocities.
Article
Engineering, Mechanical
Yu-Tong Sui et al.
Summary: This study investigates the oblique water entry of high-speed projectiles, revealing the impact of nose shape on cavity behavior and load characteristics. The dynamics of the cavity are classified into two types, showing a close relationship between transient impact load and cavity dynamics, with a quantitative relationship between load peaks and two dimensionless parameters uncovered.
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