ABS-POLAR-WATERS-GUIDE-2008.pdf
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1、 Guide for Building and Classing Vessels Intended for Navigation in Polar Waters GUIDE FOR BUILDING AND CLASSING VESSELS INTENDED FOR NAVIGATION IN POLAR WATERS MARCH 2008 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 Copyright 2007 American Bureau of S
2、hipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:54:20 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentiona
3、lly Left Blank Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:54:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDE FOR BUILDING AND CLASSING VESSELS INTENDED FOR NAVIGATION
4、IN POLAR WATERS . 2008 iii Foreword Foreword This Guide contains requirements obtained from IACS Unified Requirements, UR I1 “Polar Class Descriptions and Application”, I2 “Structural Requirements for Polar Class Ships” and I3 “Machinery Requirements for Polar Class Ships”. These IACS documents are
5、available from www.iacs.org.uk. The objective of Section 1 is to specify the application of the structural and machinery requirements for polar vessels, and to provide descriptions of the various Polar Classes used throughout these requirements to convey differences with respect to operational capab
6、ility and strength. The scope of Section 2 includes ice load definition, as well as specific strength requirements for plating, framing (including web frames and load-carrying stringers), plated structures (such as decks and bulkheads), and the hull girder. The scope of this Section also includes ma
7、terial requirements, as well as corrosion/abrasion allowances. General strength requirements for hull appendages stem and stern frames, as well as some provisions for local details, direct calculations and welding, are also included. The objective of Section 2 is to provide a unified set of structur
8、al requirements to enable Polar Class vessels to withstand the effects of global and local ice loads, as well as temperatures, characteristic of their Polar Class. The scope of Section 3 includes the design ice thickness and strength index for the purpose of calculating the propeller ice loads, for
9、open and nozzle propellers. Further, the Section provides analytical tools for calculating strength of the propeller blade. Finally, this Section defines accelerations imposed upon machinery due to ice impact/ramming are required in order that the integrity of holding-down arrangements of essential
10、machinery is maintained. The provided method for calculation of these accelerations requires additional information on bow vertical ice force and bow side ice force magnitudes from the Structural Requirements in Section 2. As one can see from the concise summary of Section 3 above, no requirements f
11、or shafting, gears, and flexible couplings are provided. Therefore, based on ABS practices, these requirements are incorporated within 3/13.7. Notably, the propulsion power requirement is presented as a goal criterion, (i.e., a vessel is to be able to maintain a design service speed in ice). This ap
12、proach of tackling this complex issue is taken considering that a commercial operation in arctic waters may impose navigation requiring a minimum power for maintaining a safe operation of the vessel in re-frozen (brash ice) fairway navigation channel and that a propulsion power requirement depends o
13、n vessel/machinery configurations, all of which necessitate attention to details in powers estimation. Subsection 3/9 provides a general guidance how to assess the power of propulsion machinery. The effective date of this Guide is 1 March 2008 and it is applicable for vessels contracted for construc
14、tion on or after 1 March 2008. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:54:20 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left Blank Copyright America
15、n Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:54:20 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDE FOR BUILDING AND CLASSING VESSELS INTENDED FOR NAVIGATION IN POLAR WATERS . 2008 v Table o
16、f Contents GUIDE FOR BUILDING AND CLASSING VESSELS INTENDED FOR NAVIGATION IN POLAR WATERS CONTENTS SECTION 1 Introduction1 1 General 1 1.1 Application 1 1.3 Ice Breaker Class1 3 Description of Ice Class.1 3.1 Guide for Selection of Polar Classes.1 5 Definitions 2 5.1 Upper and Lower Ice Waterlines.
17、2 TABLE 1 Polar Class Descriptions2 SECTION 2 Structural Requirements for Polar Class Vessels 3 1 Application .3 3 Hull Areas 3 3.1 General .3 5 Design Ice Loads.4 5.1 General .4 5.3 Glancing Impact Load Characteristics.5 5.5 Bow Area 5 5.7 Hull Areas Other Than the Bow.7 5.9 Design Load Patch8 5.11
18、 Pressure within the Design Load Patch 8 5.13 Hull Area Factors 9 7 Shell Plate Requirements 10 7.1 Required Minimum Shell Plate Thickness.10 7.3 Shell Plate Thickness to Resist Ice Load 10 9 Framing General.12 11 Framing Transversely-framed Side Structures and Bottom Structures14 13 Framing Side Lo
19、ngitudinals (Longitudinally-framed Vessels) .16 15 Framing Web Frames and Load-carrying Stringers .17 17 Framing Structural Stability.17 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:54:20 MDTNo reproduction o
20、r networking permitted without license from IHS -,-,- vi ABS GUIDE FOR BUILDING AND CLASSING VESSELS INTENDED FOR NAVIGATION IN POLAR WATERS . 2008 19 Plated Structures .19 21 Corrosion/Abrasion Additions and Steel Renewal.19 23 Materials.20 25 Longitudinal Strength.22 25.1 Application.22 25.3 Desig
21、n Vertical Ice Force at the Bow 22 25.5 Design Vertical Shear Force24 25.7 Design Vertical Ice Bending Moment 25 25.9 Longitudinal Strength Criteria25 27 Stem and Stern Frames.26 29 Appendages.26 31 Local Details 26 33 Direct Calculations.27 35 Welding27 TABLE 1 Class Factors.5 TABLE 2 Peak Pressure
22、 Factors 9 TABLE 3 Hull Area Factors (AF).10 TABLE 4 Corrosion/Abrasion Additions for Shell Plating19 TABLE 5 Material Classes for Structural Members of Polar Class Vessels.20 TABLE 6 Steel Grades for Weather Exposed Plating.21 TABLE 7 Steel Grades for Inboard Framing Members Attached to Weather Exp
23、osed Plating.22 TABLE 8 Longitudinal Strength Criteria 25 FIGURE 1 Hull Area Extents .4 FIGURE 2 Definition of Hull Angles.6 FIGURE 3 Shell Framing Angle .11 FIGURE 4 Stiffener Geometry.13 FIGURE 5 Parameter Definition for Web Stiffening 18 FIGURE 6 Steel Grade Requirements for Submerged and Weather
24、 Exposed Shell Plating .21 FIGURE 7 Bow Shape Definition.23 FIGURE 8 Illustration of eb Effect on the Bow Shape for B = 20 and LB =1624 SECTION 3 Machinery Requirements for Polar Class Vessels .29 1 Application .29 3 Drawings and Particulars to be Submitted.29 3.1 Environmental Conditions29 3.3 Draw
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