Ice Resistance Model Test Technology for 110K Tanker Adopting FSICR Ice Class IA

2013 ◽  
Vol 779-780 ◽  
pp. 1117-1123
Author(s):  
Jia Ning Zhang ◽  
Yu Chen Shang ◽  
Lei Zhang
Keyword(s):  
Output Power ◽  
Model Test ◽  
Technical Requirements ◽  
Ship Model Test ◽  
Ice Model Test ◽  
Ice Navigation ◽  
Primary Measure ◽  
Oil Tanker ◽  
Ice Resistance ◽  
Ice Model

Ship model test in ice towing tank is one of the key technologies for the design of ice-strengthened ship, and is the primary measure of determining the ship required minimum engine output power in ice navigation and checking whether satisfies the requirements of ice class rules. Researched the relevant requirements of 1A ice-strengthened ship based on the Finnish-Swedish ice class rules (FSICR), which is minimum engine output power according to the forward form of hull line and according to standard formulas. Studied the technical requirements of ice model test. Determined the minimum engine output power for 110k oil tanker with ice class 1A based on ice model test.

Study on the Ship Ice Resistance Estimation Using Empirical Formulas

2014 ◽  
Author(s):  
Kyung Duk Park ◽  
Hyun Soo Kim
Keyword(s):  
Model Test ◽  
High Reliability ◽  
Main Idea ◽  
Estimation Technique ◽  
Empirical Formulas ◽  
Level Ice ◽  
Arctic Ice ◽  
Ice Model Test ◽  
Ice Resistance ◽  
Ice Model

The ice resistance estimation technique for icebreaking ships has been studied intensively over recent years to meet the need of arctic vessel design. Before testing in the ice model basin, the estimation of ship ice resistance with high reliability is very important to decide the delivered power necessary for level ice operation. The main idea of this study came from several empirical formulas by B.P. Ionov[1], E. Enkvist[2] and J.A. Shimanskii[3], in which ice resistance components such as icebreaking, buoyancy and clearing resistances were represented by the integral equations along the DLWL (Design Load Water Line). However, this study proposes modified methods considering the DLWL shape as well as the hull shape under the DLWL. In the proposed methodology, the DLWL shape for icebreaking resistance and the hull shape under the DLWL for buoyancy and clearing resistances are included in the calculation. Especially when calculating clearing resistance, the flow pattern of ice particles under the DLWL of ship is assumed to be in accordance with the ice flow observed from ice model testing. This paper also deals with application examples for a ship design and its ice model test results at the Aker arctic ice model basin. From the comparison of results from the model test and the estimation, the reliability of this estimation technique is discussed.

scholarly journals A Study on Improvement of Ice Model Test Procedure

2008 ◽  
Vol 45 (5) ◽  
pp. 562-568 ◽  
Author(s):  
Chun-Ju Lee ◽  
Seong-Rak Cho ◽  
Michael Lau ◽  
Jung-Yong Wang
Keyword(s):  
Model Test ◽  
Test Procedure ◽  
Ice Model Test ◽  
Ice Model

Validation of Pack Ice Resistance in Oblique Condition by the Comparison With Ice Model Test Results

2019 ◽  
Author(s):  
HyunSoo Kim ◽  
Erinc Ozden ◽  
Jae-bin Lee
Keyword(s):  
Model Test ◽  
Construction Projects ◽  
Arctic Region ◽  
Resource Development ◽  
Offshore Structures ◽  
The Arctic ◽  
Pack Ice ◽  
Ice Model Test ◽  
Ice Resistance ◽  
The Arctic Region

Abstract Countries around the world are increasingly interested in resource development in the Arctic due to global warming. Recently, Arctic coastal states (Russia, USA, Canada, etc.) are pursuing infrastructure construction projects for resource development in the Arctic region. Because the offshore structures in the Arctic are exposed to the sea ice, in order to ensure the safety of the structures, the calculation of the ice resistance is of paramount importance for offshore structures. In general, studies on the ice resistance have been carried out for the breaking and clearing performance of icebreakers. However, in the case of fpu (floating production unit) for resource development in the Arctic region, it is necessary to estimate the ice resistance in the oblique condition to ensure safety. Thus, despite estimation of the ice resistance in the oblique condition is significant, there has not been enough research until recently. In this paper, we suggest algorithms for estimating the ice resistance in the oblique condition. For the estimation process, an in-house code software program is used and an ice resistance estimation module is implemented for the oblique condition using empirical formula. This paper shows results of the ice resistance which was calculated in the oblique condition, and the change of the ice resistance is shown according to various oblique angles in pack ice. In addition, the results are compared to the model test result of a fpu in pack ice of 80% concentration.

Research on the Wing's Thrust of “Wenzhuhai” Ship with Install Wing

2012 ◽  
Vol 462 ◽  
pp. 307-312 ◽  
Author(s):  
Hong Ying Ren ◽  
Pei Ting Sun ◽  
You Tao Zhao ◽  
Lian Zhong Huang ◽  
Hong Ming Wang ◽  
...  
Keyword(s):  
Model Test ◽  
Ship Model ◽  
Ship Resistance ◽  
Examination Result ◽  
Ship Model Test ◽  
Fluent Software

In this paper the resistance of one ship with installing wing and wing’s thrust have been studied in both theory and simulation by fluent software. The influence of ship resistance which from leeway angle and down helm was analyzed on the basis of the examination result of ship model test.

Ice Model Testing of Structures With a Downward Breaking Cone at the Waterline JIP: Presentation, Set-Up and Objectives

2011 ◽  
Author(s):  
Per Kristian Bruun ◽  
Sveinung Lo̸set ◽  
Arne Gu¨rtner ◽  
Guido Kuiper ◽  
Ted Kokkinis ◽  
...  
Keyword(s):  
First Year ◽  
Test Set ◽  
Ice Load ◽  
Fixed Model ◽  
Ice Conditions ◽  
Level Ice ◽  
Ice Model Test ◽  
Set Up ◽  
Ice Failure ◽  
Ice Model

Two large ice model test campaigns were performed in the period 2007–2010 as a part of a Joint Industry Project. The objectives of the project were to investigate different floater geometries and ice model test set-ups (model fixed to a carriage and pushed through the ice vs. ice pushed towards a floating model moored to the basin bottom) and their influence on the ice failure mode and structure responses in the various tested ice conditions. This paper presents the objectives and motivations for the project, the models tested, the target test set-up for the various tested configurations and the test matrix. Initial results from a fixed model tested in three first-year ice ridges with similar target ice properties are also presented and compared. Fixed models of both deep and shallow water platforms were tested in various ice conditions. All models except one had a downward breaking cone at the waterline. The influences of the waterline diameter, the angle of the downward breaking cone and the vertical cone height on the ice failure mode and the resulting ice load were investigated. Tests were conducted in level ice with a thickness ranging from 2 to 3 m and variable ice drift speeds ranging from 0.1 to 1.0 m/s in full scale values. The models were subjected to tests in managed level ice with varying speeds, ice concentrations and ice floe sizes. Fixed structures were also subjected to testing in typical first-year design ice ridge conditions with ridges of different depths and widths, as well as one multi-year ice ridge. One fixed model was also utilised for testing of the repeatability of scaled ice model testing. Moored models with the same waterline geometry as the fixed models were also tested. The moored models were tested in ice conditions similar to those of the fixed models with the objective of comparing their influences on the ice load due to structural responses.

Safe Speed in Bridge Area and Impact Determination for Pier

2012 ◽  
Vol 253-255 ◽  
pp. 2064-2070
Author(s):  
Ning Yang Fan ◽  
Xiao Ping Liu
Keyword(s):  
Model Test ◽  
Scientific Method ◽  
Management Issue ◽  
Ship Model ◽  
Practical Experiment ◽  
Safe Navigation ◽  
Ship Model Test ◽  
Intercity Railway ◽  
Current Impact ◽  
Operation And Management

The safe speed in bridge area and the security of the bridge’s structure is a technical and a management issue; it should pay highly attention in terms of design, maintenance, and operation and management. The point of the shipping departments and the bridge designing departments for reference in two distinguished aspects are discussed when it comes into the problems of the speed in bridge area. The conception of “safe speed in bridge area” is based on current impact determination for pier and the study of safe speed at home and abroad. The ship adopted the safe shipping speed in bridge area and can meet the requirements of the safe navigation demanded by the shipping departments, and its velocity value can provide reference for the bridge designing in terms of anti-collision. The practical experiment on super large bridge in Changzhutan intercity railway and the ship model test on navigation show that the presentation of safe speed in bridge area ships was a relatively scientific method, and the presentation can provide new idea on solving contradiction between the construction of the bridge and the navigation part.

scholarly journals Numerical calculation of the resistance of catamarans at different distances between two hulls

2021 ◽  
Vol 283 ◽  
pp. 01008
Author(s):  
Zhaochun Liu ◽  
Xiufeng Zhang ◽  
Yao Meng ◽  
Linghong Wang
Keyword(s):  
Numerical Calculation ◽  
Model Test ◽  
Calculation Method ◽  
Empirical Formula ◽  
Test Method ◽  
Hydrodynamic Characteristics ◽  
Model Parameters ◽  
Ship Model ◽  
Ship Model Test ◽  
Numerical Calculation Method

For the design of high-speed catamarans, different distances between slices have obvious interference with the total resistance of the catamaran. In order to accurately predict the hydrodynamic characteristics of the catamaran and explore the interference of the chip spacing on the resistance prediction, this paper uses a combination of CFD calculations and empirical formulas to predict the ship model resistance under different chip spacings and calculate them. The result is compared with the empirical formula. The results of the ship model test and the results calculated by the empirical formula were used to verify the numerical calculation results. The results show that the resistance change trend is consistent, and the numerical calculation method is effective and feasible. Finally, the numerical calculation method is compared with the ship model test method, and the result is within the error range, which has certain reference value for the design and optimization of the catamaran model parameters.

A Numerical Method for Ice Resistance Calculation of Polar Ships Navigating in Floating Ice Region

2019 ◽  
Author(s):  
Hui Li ◽  
Yuan Qian ◽  
Yan Feng ◽  
Weijia Sheng ◽  
Haojin Li
Keyword(s):  
Sea Ice ◽  
Numerical Method ◽  
Coupling Effect ◽  
Great Influence ◽  
Coverage Rate ◽  
The Finite Element Method ◽  
Tank Model ◽  
Ice Coverage ◽  
Ice Resistance ◽  
Ice Model

Abstract This paper presents a numerical method for forecasting the ice resistance of polar ships navigating in floating ice region. The finite element method is adopted to analyze the interaction between ship and floating ice including the coupling effect between ice and water. Based on the comparison between the sea ice test data and the numerical simulation of the ice model, it is verified that the numerical method can successfully simulate the characteristics of sea ice materials. The accuracy of the numerical method is validated against ice tank model test. By using this method, the resistances of a polar ship navigating in floating ice region with different ice coverage rate (60%, 70%, 80% and 90%) at different speeds are calculated. The results show that the ice coverage rate has a great influence on the ice resistance, and the ice resistance varies with ship speeds.

The Resistance of Ice Breaking Ships Based on Model Tests

2015 ◽  
Author(s):  
Seong-Rak Cho ◽  
Kuk-Jin Kang ◽  
Sungsu Lee
Keyword(s):  
Model Tests ◽  
Design Stage ◽  
Preliminary Design ◽  
Factors Associated ◽  
Preliminary Design Stage ◽  
Level Ice ◽  
Resistance Prediction ◽  
Ice Resistance ◽  
Priority Factor ◽  
Ice Model

The two most important tasks of ice breaking ships are first to secure a sailing route by breaking the thick sea ice and second to sail efficiently herself for purposes of exploration and transportation in the polar seas. The resistance of ice breaking ships is a priority factor at the preliminary design stage; not only must their sailing efficiency be satisfied, but the design of the propulsion system will be directly affected. Therefore, the performance of ice-breaking ships must be accurately calculated and evaluated through the use of model tests in an ice model basin before construction starts. In this paper, a new procedure is developed, based on model tests, to estimate a ship’s ice resistance during continuous icebreaking in level ice. Some of the factors associated with crushing failures are systematically considered in order to correctly estimate her ice-breaking resistance, while the effects of the hull geometry, as reflected in the length, breadth, and draft of ships, are considered in calculating buoyancy and clearing resistance. Multiple regression analysis is calculated with each ice resistance component. This study is intended to contribute to the improvement of the techniques for ice resistance prediction with ice breaking ships.

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