쇄빙 연구선의 저항성능 및 진동개선에 관한 연구

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Today, the increase in concern about the design of icebreakers and icebreaking ships is caused by the development on Arctic areas.
When an icebreaker is designed, one of the main goals is to minimize the forces resulting from crushing and breaking the ice.
The spoon-shaped bow and round hull in order to minimize the icebreaking forces, have poor hydrodynamic efficiency and seekeeping characteristics, and make the icebreaker susceptible to slamming. For this reason, the hull of an icebreaker is often a compromise between minimize ice resistance, maneuverability in ice, low hydrodynamic resistance, and adequate open water characteristics.
Some icebreakers have a hull that is wider in the bow than in the stern.
These so-called “reamers” increase the width of the ice channel and thus reduce ice frictional resistance in the aftship as well as improve the ship’s maneuverability in ice.
However, it is well known that the reamers suffer from an additional resistance in open water.

In this thesis, basic design process for an icebreaker is introduced, a reamers’ effects on resistance performance in open water is examined by model tests and a free and forced vibration analysis is performed to verify vibration problems.

To examine reamers’ phenomenon by model tests, the additional resistance in open water of the 6,950-ton research icebreaker model with different type reamers is measured at the circulating water channel of the Chosun university.
Various combinations of ship speeds and reamer types are tested at two draught conditions. These experimental results with different reamers are compared to the results without reamers. It can be concluded that smaller the angle between the designed waterplane and the buttock line near reamers, the better resistance performance in open water.
In addition to the study on hydrodynamic effects of reamers, a free and forced vibration analysis of the global icebreaker structure using ANSYS program based on 3-dimensional finite element (FE) method is performed at various conditions (full and 90 % load).
It can be concluded that no vibration problem relating to hull is expected.
Alternative Title
Study on the improvement of resistance and vibration performances for Ice Breaking Research Vessel
Alternative Author(s)
Lee, Chung Hwan
일반대학원 선박해양공학과
Awarded Date
Table Of Contents
목 차

제1장 서론 1

제1절 개요 1
제2절 쇄빙선 4
1. 쇄빙선의 역사적 배경 10
2. 쇄빙선의 종류 14
3. 쇄빙선의 기능과 특징 16
4. 쇄빙선의 선형 16
제3절 일반적인 특성 20
1. 선수부 형상 (Bow Geometry) 20
제4절 쇄빙선의 구조적 특징 20
제5절 쇄빙선 구조관련 빙특성 24
1. 빙등급 (Ice Class) 26
2. 내빙대 (Ice Belt) 27
3. 빙하중 (Ice Load) 28
4. 부재치수 (Scantling) 30
5. 빙저항 추정식 분석 34
제6절 해외기술동향 및 쇄빙선 보유현황 39
1. 기술동향 39
제7절 북극해 항로에 관한 국제 공동연구 INSROP
프로그램의 개요 40
1. INSROP 프로그램의 구성 41
2. 북방항로 (Northern Sea Route) 43
3. INSROP 프로그램의 1단계 연구 내용 45

제2장 선형설계 46
제1절 쇄빙선의 주요요목 특성 46
제2절 선수형상 (Bow Geometry) 특성 50

제3장 기본계산 및 성능 추정 51
제1절 유체정역학적 특성계산 51
제2절 Datebase와 File folder 55
제3절 Ship Regist & Copy 56
1. Line Derivation (Initial) 56
2. Lines and Hydro (Initial) 58
3. Calculation of Ballast Condition 61
4. Deadweight Check 63
5. Offset Table Edit 64
6. Structure Definition 66
7. 3D Viewer 67
8. Hydrostatics Calculation 68
9. Projection Area 69
10. Cross Curve 70
11. Gross Tonnage 71
12. Speed Calculation 72
13. Ship Speed Check 75

제4장 결론 76
이충환. (2015). 쇄빙 연구선의 저항성능 및 진동개선에 관한 연구.
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General Graduate School > 4. Theses(Ph.D)
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  • Embargo2015-08-25
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