Results 11 to 20 of about 3,364 (224)

Recent study progress of underwater sound absorption coating

open access: yesEngineering Reports, 2023
Based on the recent development of underwater sound absorption coatings, this paper analyzes the evolution of underwater sound absorption coatings from two aspects: traditional structures and metamaterials.
Zhicheng Zhang, Yanbiao Zhao, Nansha Gao
doaj   +1 more source

Buckling of composite cylindrical shells with ovality and thickness variation subjected to hydrostatic pressure

open access: yesDefence Technology, 2022
The initial geometric imperfection is one of the primary factors affecting the buckling behaviors of composite cylindrical shells under hydrostatic pressure.
Zhun Li   +3 more
doaj   +1 more source

Leak Detection and Localization in Multi-Grid Space Using Improved Gaussian Plume Model

open access: yesSensors, 2023
Leak detection and localization of liquid or gas is of great significance to avoid potential danger and reduce the waste of resources. Leak detection and localization methods are varied and uniquely suited to specific application scenarios.
Daquan Li, Gaigai Liu, Zhaoyong Mao
doaj   +1 more source

Collaborative Control of Unmanned Underwater Vehicles [PDF]

open access: yesJournal of Physics: Conference Series, 2021
Abstract This paper targets at urgent issues, which are the search for complex underwater environments and the effective control of underwater seas. Firstly, studies the collaborative control of task-oriented UUV. Secondly, designs reasonable controllers and prove the rendezvous of UUV.
Huailong Wang, Zhenxing Yao, Yinghui Guo
openaire   +1 more source

Shape optimization of a blended-wing-body underwater glider using surrogate-based global optimization method IESGO-HSR

open access: yesScience Progress, 2020
As a novel flying-wing configuration underwater glider, the blended-wing-body underwater glider (BWBUG) has the satisfactory hydrodynamic performance in comparison to the conventional cylindrical autonomous underwater gliders (AUGs).
Pengcheng Ye, Guang Pan
doaj   +1 more source

Model predictive control of a hybrid autonomous underwater vehicle with experimental verification [PDF]

open access: yes, 2014
In this work model predictive control is used to provide transit and hover capabilities for an autonomous underwater vehicle where the description of the system dynamics used include terms measured experimentally.
Bodles, Kenneth   +11 more
core   +1 more source

Numerical Simulation of Nonlinear Flow Based on Element-Free Galerkin Method

open access: yesXibei Gongye Daxue Xuebao, 2019
This paper focuses on the studying on some flow problems of nonlinear based on the Element Free Galerkin method. First the Navier-Stokes equation is discretized with the Galerkin method. The inertial term in the equation is discretized with the method of

doaj   +1 more source

A Method to Reduce Eddy Current Loss of Underwater Wireless Power Transmission by Current Control

open access: yesApplied Sciences, 2022
In recent years, wireless power transmission (WPT) technology based on magnetic resonance has been extensively studied. However, in contrast to that in the air, wireless power transmission in seawater medium will be accompanied by inevitable energy loss,
Jiale Wang, Baowei Song, Yushan Wang
doaj   +1 more source

Influence of geometric imperfections on the axially loaded composite conical shells with and without cutout

open access: yesAIP Advances, 2020
The nonlinear stability analysis of a structure with initial geometric imperfections is very complex, difficult, and unsolved yet in designing. At present, there are no unified design guidelines for imperfection sensitive metal shells (spherical ...
Zhun Li, Yonghui Cao, Guang Pan
doaj   +1 more source

Research on Unmanned Underwater Vehicle Threat Assessment [PDF]

open access: yesIEEE Access, 2019
The unmanned underwater vehicle (UUV) plays an ever increasing and important role in the modern marine environment. In particular, the tasks of underwater reconnaissance and surveillance, underwater mine hunting and anti-submarine warfare, all poses a serious and dangerous threat to humans.
Hongfei Yao   +4 more
openaire   +2 more sources

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