Dynamic Analysis of Floating Bodies Considering Multi-Body Interaction Effects

2010 ◽  
Author(s):  
Young-Bok Kim ◽  
Moo-Hyun Kim ◽  
Yong Yook Kim ◽  
Young-Hun Kim
Keyword(s):  
Positioning System ◽  
Container Ship ◽  
Simulation Studies ◽  
Effective Solution ◽  
Floating Bodies ◽  
Dynamic Positioning System ◽  
Mobile Harbor ◽  
Effective Operation ◽  
Large Container ◽  
Multi Body

Recently, there are several problems in space, infra-structure, and facility in the contiguity of existing harbors due to the trend of enlarged container vessels. In this regard, the Mobile Harbor has been proposed conceptually as an effective solution for those problems. This concept is a kind of transfer loader of the containers from the large container ship to the harbor on land, which is a floating barge of a catamaran type. The catamaran-type vessel is well known for its advantage in maneuverability, resistance, and the effectiveness for working on board. For the safe and effective operation of the two floating bodies, a container ship and the mobile harbor in the near sea apart from the quay, robot arms, novel crane systems, and pneumatic fenders are specially devised with additional mooring facility or DP (dynamic positioning) system. The concept is to be verified through comparison and simulation studies under various environmental conditions. It is shown that the proposed concept is in general feasible but there are several areas for further investigation and improvement.

scholarly journals Development of Dynamic Positioning System of Coupled Floating Bodies by Neural Networks

2001 ◽  
Vol 2001 (190) ◽  
pp. 705-714
Author(s):  
Eiichi Kobayashi ◽  
Masami Matsuura ◽  
Katsuya Daigo ◽  
Masaru Ihara ◽  
Hiroaki Hirayama ◽  
...  
Keyword(s):  
Neural Networks ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Floating Bodies ◽  
Dynamic Positioning System

Structural Brittle Crack Arrest Design for Ultra Large Container Ship

2012 ◽  
Vol 81 (6) ◽  
pp. 485-488
Author(s):  
Masanobu TOYODA ◽  
Tsunehisa HANDA
Keyword(s):  
Crack Arrest ◽  
Container Ship ◽  
Brittle Crack ◽  
Large Container

Modeling and Simulation of Ship Motion for Dynamic Positioning Vessel

2014 ◽  
Vol 919-921 ◽  
pp. 2127-2130
Author(s):  
Pei Wen Yu ◽  
Hui Chen
Keyword(s):  
Modeling And Simulation ◽  
Wind Wave ◽  
Ship Motion ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Dynamic Positioning System ◽  
Oil Supply ◽  
Mmg Model ◽  
Simulation Results

The paper presents a method to build MMG model of ship motion for a oil supply vessel (OSV) with dynamic positioning system. It is assumed that the ship motion exposed to environment disturbances like wind, wave & currents, The simulation results show that the model of the vessel and environment disturbances are suitable, and the method is practicable .

Reduced-Order Time-Domain Simulation of Floating Bodies for Efficient Design Analysis

2015 ◽  
Author(s):  
Hyun Y. Kim ◽  
Stephanie L. Fitzpatrick ◽  
David C. Kring
Keyword(s):  
Memory Function ◽  
Computational Effort ◽  
Impulse Response Functions ◽  
Time Domain Simulation ◽  
Efficient Design ◽  
Floating Bodies ◽  
Order Model ◽  
Reduced Order ◽  
Multi Body ◽  
Multiple Floating Bodies

This paper describes the development and implementation of a reduced-order model to represent the hydrodynamic forces acting on a ship using Impulse-Response Functions (IRF). The approach will be conducted using Aegir, a timedomain seakeeping program that uses an advanced, Non-Rational Uniform B-Spline (NURBS) based, high-order boundary element method. The Cummins equation is slightly modified such that the memory function is decomposed into two terms: one for the impulsive velocity and the other term for the impulsive displacement. The present approach also further develops a method to simulate interactions between multiple floating bodies. The IRF convolutions for the free surface memory effect significantly reduce the computational effort compared to direct simulation. This will be demonstrated for both single and multi-body forward-speed, seakeeping simulations.

scholarly journals Dynamic positioning system design for “blue lady”. simulation tests

2012 ◽  
Vol 19 (Special) ◽  
pp. 57-65 ◽  
Author(s):  
Mirosław Tomera
Keyword(s):  
Dynamic Positioning ◽  
Positioning System ◽  
System Operation ◽  
Training Centre ◽  
Dynamic Positioning System ◽  
Operational Quality ◽  
The Mathematical Model ◽  
And Training ◽  
Ship Handling

ABSTRACT The dynamical positioning system is a complex control consisting of a number of components, including: filters, observers, controllers, and propeller allocation systems. The design and preliminary analysis of operational quality of system operation are usually done based on numerical simulations performed with the aid of the mathematical model of the ship. The article presents a concept of the dynamic positioning system applied to steering the training ship Blue Lady used for training captains in the ship handling research and training centre owned by the Foundation for Safety of Navigation and Environment Protection in Ilawa/Kamionka. The simulation tests performed in the numerical environment of Matlab/Simulink have proved the usability of the designed system for steering a ship at low speed.

scholarly journals Analysis of Impact of Ship Model Parameters on Changes of Control Quality Index in Ship Dynamic Positioning System

2019 ◽  
Vol 26 (1) ◽  
pp. 6-14 ◽  
Author(s):  
Tacjana Niksa Rynkiewicz ◽  
Anna Witkowska
Keyword(s):  
Quality Index ◽  
Adaptive Controller ◽  
Model Parameters ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Integral Control ◽  
Dynamic Positioning System ◽  
Ship Model ◽  
Control Quality ◽  
The Impact

Abstract In this work there is presented an analysis of impact of ship model parameters on changes of control quality index in a ship dynamic positioning system designed with the use of a backstepping adaptive controller. Assessment of the impact of ship model parameters was performed on the basis of Pareto-Lorentz curves and ABC method in order to determine sets of the parameters which have either crucial, moderate or low impact on objective function. Simulation investigations were carried out with taking into account integral control quality indices.

Sign in / Sign up

Export Citation Format

Share Document