Results 21 to 30 of about 824 (150)

Study of Applicability in Minimising Pitch Radius Gyration for Different Hull Types to Improve Seakeeping Performance [PDF]

Journal of Marine Science and Engineering
This paper presents an optimisation study to determine the best centre of gravity (CoG) position to improve seakeeping performance. Two varied parameters used in this study were the longitudinal and vertical centre of gravity (LCG and VCG).
Muhammad Iqbal, Andi Trimulyono, Samuel, Ocid Mursid   +3 more
doaj   +3 more sources

Efficient seakeeping performance predictions with CFD

, 2019
Tack vare den stadigt ökande beräkningskraften kan beräkningsuiddynamik (CFD) idag användas på beräkningsintensiva problem som sjöegenskapssimulationer. Den här rapporten undersöker användning av CFD på sjöegenskapsprestanda och syftar till att foreslå ett best-practice förfaringssätt för effektiv sjöegenskapssimulationer.
Lagemann, Benjamin
openaire   +2 more sources

Computational Investigation of Seakeeping Performance of a Surfaced Submarine in Regular Waves

한국해양공학회지, 2022
A submarine is optimized to operate below the water surface because it spends most of its time in a submerged condition. However, the performance in free surface conditions is also important because it is unavoidable for port departure and arrival ...
Doojin Jung, Sanghyun Kim
doaj   +1 more source

Multi-state luxury cruise ship seakeeping based on overlapping grids

Zhongguo Jianchuan Yanjiu, 2022
ObjectiveIn the design stage of a luxury cruise ship, in order to save costs, it is necessary to use the computational fluid dynamics (CFD) method to predict the seakeeping performance of the cruise ship under design.
Mu ZHANG, Jianhua WANG, Decheng WAN
doaj   +1 more source

Numerical Study of the Effect of Angle and Location of the First and Second Steps on the Performance of Planing Hull and Their Optimization Using the Taguchi Statistical Method

Mathematical Problems in Engineering, Volume 2023, Issue 1, 2023., 2023
Providing steps at the bottom of a high‐speed craft could decrease the resistance and enhance the longitudinal stability by dividing a single pressure hump into several ones and extending the hydrodynamic pressure towards aft of the vessel. In the present paper, the effects of the fore and aft steps’ locations and angles on double‐stepped hulls are ...
Parviz Ghadimi, Sayyed Mahdi Sajedi, Mohammad Sheikholeslami, Aliakbar Ghadimi, Jie Hu   +4 more
wiley   +1 more source

Expediting recovery of autonomous underwater vehicles in dynamic mission environments: A system‐of‐systems challenge for underwater warfare

Journal of Field Robotics, Volume 39, Issue 8, Page 1323-1340, December 2022., 2022
Abstract As autonomous underwater vehicle (AUV) adoption increases, operators demand advanced behaviors from commercial off‐the‐shelf systems. However, new behaviors can often only be deployed operationally once assured. This paper overviews research into expediting recovery to an operator's vessel through a custom homing behavior, demonstrating ...
James Keane, Keith F. Joiner, Sanjeev Arulampalam, Russ Webber   +3 more
wiley   +1 more source

Autonomous hanging tether management and experimentation for an unmanned air‐surface vehicle team

Journal of Field Robotics, Volume 39, Issue 6, Page 869-887, September 2022., 2022
Abstract The mission of an unmanned air vehicle (UAV) tethered to a small unmanned surface vehicle (USV) is considered. As opposed to the majority of existing tethered UAV work, which assumes a taut tether, this paper addresses the challenge of tether management for a slack, hanging tether in a dynamic ocean environment up to sea state 4 on the Douglas
Kurt Talke, Frederick Birchmore, Thomas Bewley   +2 more
wiley   +1 more source

Modal Investigation on a Large‐Scale Containership Model for Hydroelastic Analysis

Shock and Vibration, Volume 2022, Issue 1, 2022., 2022
A 20,000 TEU containership with an overall length of about 400 m is designed as a target ship to investigate ship hydroelastic characteristics in the joint industry project (JIP) of CSSRC‐20,000 TEU. A set of systematic model tests are carried out in the seakeeping wave basin of CSSRC.
Ye Lu, Juan Liu, Bei Teng, Chao Tian, Hailong Si, Qingyun Zhou, Xinyun Ni, Jialong Jiao   +7 more
wiley   +1 more source

Risk Spatial Distribution and Fluctuation Mechanism of Ship Traffic System Based on Catastrophe Control and Intelligent Sensor

Wireless Communications and Mobile Computing, Volume 2022, Issue 1, 2022., 2022
Navigation control system is an important navigation building of inland‐river in China. Because of its special semiclosed structure, when the efficiency of the mutation control system is low, the ship system cannot identify the ship, which may endanger the life safety of the crew and cause water traffic accidents.
Ji Qi, Yuying Yuan, Wei Li, Fangjing Zhang, Yali Li, Deepak Kumar Jain   +5 more
wiley   +1 more source

Numerical simulation of seakeeping performance of a trimaran small waterplane area center hull

Zhongguo Jianchuan Yanjiu, 2020
[Objectives] Compared with trimarans, the trimaran small waterplane area center hull (TriSWACH)has a larger underwater ship and the waterline surface is greatly reduced,therefore,the seakeeping law of ordinary trimaran is not completely applicable to ...
ZHANG Mingxia, LU Pengcheng, WANG Zhihao
doaj   +1 more source