Article
Engineering, Marine
R. P. Surya Praba, K. Ramajeyathilagam
Summary: This paper presents a numerical investigation using the coupled Arbitrary Lagrangian-Eulerian (ALE) method to study the inelastic dynamic response and microstructure failures of a composite hull subjected to underwater explosion. The study predicts the transient response and damage of the hull, and the results are valuable for designers.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Engineering, Civil
Yang Yang, Jun-Jian Li, Yu Zhang, Qi He, Hong-Liang Dai
Summary: This paper investigates the strength and buckling behavior analysis of a ring-stiffened cylindrical shell for sightseeing submersibles under mechanical and thermal loads. It shows that external load has the most significant influence on the shell's strength, while shell thickness has the most obvious effect on its buckling load.
ENGINEERING STRUCTURES
(2021)
Article
Mechanics
M. R. Zarastvand, M. H. Asadijafari, R. Talebitooti
Summary: This study investigates the acoustic performance of stiffened doubly curved shells for the first time and proposes a strategy to predict the acoustic features of the stiffened systems for better sound insulation.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Rubens Zolar Gehlen Bohrer, Il Yong Kim
Summary: This paper presents a method to simultaneously optimize the material placement, selection, and stacking sequence of composite plates in a multi-material topology optimization framework. The optimal material performance is achieved by defining the material layup and conducting the optimization process.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2022)
Article
Engineering, Marine
J. J. Reijmers, M. L. Kaminski, D. Stapersma
Summary: The goal of the study is to develop a risk-based design model for marine pressure hulls that can predict collapse pressures of ring stiffened cylindrical shells with realistic geometrical imperfections. The model aims to explicitly depend on the type of imperfections.
Article
Mechanics
Rubens Zolar Gehlen Bohrer, Il Yong Kim
Summary: This article proposes a new density-based methodology for performing simultaneous topology optimization and stacking sequence optimization of constant stiffness laminated plates, providing a new approach for designing optimal composite structures.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Yuhong Liu, Huan Bai, Shihan Deng, Shuhe Liu, Shuxin Wang, Shiquan Lan, Xiaokang Li, Houcun Li, Zhijie Wang
Summary: Inspired by seals, this article develops a bionic underwater glider (SIUG) that can compensate for buoyancy loss and reduce vibration noise. Experimental and simulation results show that the SIUG can effectively suppress vibration noise propagation and maintain net buoyancy.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Yaqiang Zhu, Yuhong Liu, Shuxin Wang, Lianhong Zhang, Yanhui Wang
Summary: The study focuses on the buoyancy issue of traditional Underwater Gliders, and presents a novel Flexible-Liquid-Rigid (FLR) composite hull to achieve neutral buoyancy, enhancing the vehicle's motion characteristics and adaptability. Sea trials confirm the improved gliding performance of the proposed Flexible-bodied Underwater Glider (FUG).
JOURNAL OF BIONIC ENGINEERING
(2021)
Article
Computer Science, Information Systems
Vishakh S. S. Kumar, Prabhu Rajagopal
Summary: This paper discusses the design and implementation of an adaptive thrust distribution algorithm on a serial split-hull underwater vehicle to improve operational efficiency. The vehicle utilizes a robust Super Twisting Algorithm (STA) based control system, and simulations demonstrate the improvements achieved.
Article
Engineering, Civil
Yanan Guo, Gokhan Serhat, Marta Gil Perez, Jan Knippers
Summary: This paper investigates the influence of two geometric parameters on the buckling performance of cylindrical structures made of fiber-reinforced polymers (FRP). The stiffness properties are defined using lamination parameters, and finite element analyses are utilized to compute buckling loads under various loading conditions. The results reveal the performance level that can be achieved by specific geometric shapes and provide guidelines for the optimal design of elliptical laminated cylinders against buckling.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Marine
Yu Gao, Jiaxin Gao, Xiaowen Song, Huiming Ding, Han Wang
Summary: In this study, a collaborative grading optimization method for the geometry and layup of rib-reinforced ultra-thick composite pressure hull is proposed in order to improve the design efficiency. The sensitivity analysis of geometric parameters on weight, stability, and strength of the pressure hull is conducted. The results show that the optimized rib-reinforced configuration reduces the buoyancy factor by 41% compared to the mono-shell.
Article
Mechanics
Tiancheng Gao, Xianfeng Wang, Chen Liu, Jun Xiao, Cong Zhao
Summary: The vibration characteristics of composite laminated plates with variable stiffness were studied using modal analysis and free vibration attenuation experiments. Twenty-five variable stiffness laminates were tested by varying parameters such as fiber angle, curve ply ratio, and number of layers. The results showed that these parameters had a significant impact on the modal frequency and damping of the laminates. This study can serve as a reference for future research due to the limited experimental investigations on the vibration characteristics of variable stiffness composite laminates.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Marine
Jixin Liu, Meng Wang, Fei Yu, Shuang Gao, Tianhong Yan, Bo He
Summary: This study numerically investigates the hull-propeller interaction of an autonomous underwater vehicle (AUV) in different flow environments using computational fluid dynamics and the ANSYS Workbench software. The simulation results validate the reliability of the method by comparing them to experimental data. The study reveals that the appendages of the AUV significantly increase the drag, with the maximum increment reaching over 1.5 times the hull drag. Furthermore, propeller rotation causes an additional hull drag increment of over 25%. The findings provide guidance for AUV integration analysis.
Article
Engineering, Marine
Ross Eldred, Johnathan Lussier, Anthony Pollman
Summary: This article details the design, construction, and implementation of a novel spherical unmanned underwater vehicle prototype, the Wreck Interior Exploration Vehicle (WIEVLE). The vehicle is specifically designed for operations within confined, entanglement-prone marine environments, particularly for exploring shipwreck interiors. The key attributes of the design include a smooth spherical hull with 360-degree sensor coverage and a fixed, upward-angled thruster core.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Analytical
Josue Gonzalez-Garcia, Nestor Alejandro Narcizo-Nuci, Alfonso Gomez-Espinosa, Luis Govinda Garcia-Valdovinos, Tomas Salgado-Jimenez
Summary: This paper proposes a synchronous navigation scheme for two BlueROV2 underwater vehicles to perform a coordinated multi-vehicle task without vehicle-to-vehicle communication. The scheme utilizes a model-free second-order sliding mode controller with finite-time convergence, which is user-defined and independent of the vehicle's physical or hydrodynamic parameters. Simulation experiments demonstrate the controller's robust performance, even in the presence of high ocean currents, without the need for parameter readjustment.
