ABS-113-2003.pdf
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1、GUIDANCE NOTES ON DYNAMIC LOAD APPROACH AND DIRECT ANALYSIS FOR HIGH SPEED CRAFT FEBRUARY 2003 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 Copyright 2003 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA Copyright Amer
2、ican Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left Blank Copyright American Bureau of Shipping Provided by IHS under li
3、cense with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDANCE NOTES ON DYNAMIC LOADING APPROACH AND DIRECT ANALYSIS FOR HIGH SPEED CRAFT . 2003iii Foreword This Guide provides information about
4、the optional classification notation, Dynamic Load Approach (DLA), which is available to qualifying high-speed craft and ships for DLA certification. In addition, it provides guidance to be followed when submitting required direct analyses or such analyses submitted in place of standard calculations
5、. In the text herein, this document is referred to as “this Guide”. Part 1, Section 1 of the ABS Guide for Building and Classing High-Speed Craft, 2001 contains descriptions of the various basic and optional classification notations available. Part 3 of the HSC Guide gives specific design and analys
6、is criteria applicable to these craft. Revision 1 of this draft Guide was issued in August 2002. Users of this Guide are welcomed to contact ABS with any questions or comments concerning this Guide. Users are advised to check periodically with ABS that their version of this Guide is current. Copyrig
7、ht American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left Blank Copyright American Bureau of Shipping Provided by IHS u
8、nder license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDANCE NOTES ON DYNAMIC LOADING APPROACH AND DIRECT ANALYSIS FOR HIGH SPEED CRAFT . 2003v GUIDANCE NOTES ON DYNAMIC LOAD APPROACH AN
9、D DIRECT ANALYSIS FOR HIGH SPEED CRAFT CONTENTS SECTION 1Introduction 1 1Background. 1 1.1Types of High-Speed Craft1 1.3Current Regulations on High-Speed Craft.1 1.5Naval Requirements1 3The Concept and Benefits of DLA Analysis 2 5Types of Structural Assessments 2 5.1Strength.2 5.3Fatigue 3 5.5Vibrat
10、ion3 5.7Hydroelastic Considerations3 7Scope and Overview of the Guide 4 FIGURE 1Overview of the Analysis Requirements for High- Speed Craft . 5 FIGURE 2Schematic of the DLA Procedure of Alternative Direct Analysis. 6 SECTION 2Loading Conditions and Load Cases7 1Craft Loading Conditions. 7 3Dominant
11、Load Parameters (DLPs) 7 5Load Cases. 7 5.1Basic Considerations.7 5.3 Selection of Load Cases8 7Other Accompanying Load Components 9 9 Miscellaneous Loads. 9 SECTION 3Environmental and Service Conditions 11 1Basic Considerations. 11 3Environmental Data. 11 3.1General11 3.3Special Wave Data Needs.11
12、Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- SECTION 4Analysis of Ship Motions, Wave Loads and Extreme Values13 1Overview 13 3St
13、ill-water Loads 13 5Essential Features of Spectral-based Analysis of Motions and Loads 13 5.1General Modeling Considerations. 13 5.3Diffraction-Radiation Methods. 14 5.5Panel Model Development 14 5.7Ship Motion and Wave Load Response Amplitude Operators 14 7Extreme Values Analysis. 14 SECTION 5Equiv
14、alent Wave15 1General 15 3Equivalent Wave Amplitude 15 5Wave Frequency and Length 15 7Phase Angle and Wave Crest Position. 16 9General Procedure to Determine Other Load Components in a Load case . 17 FIGURE 1Equivalent Wave Amplitude 16 FIGURE 2Wavelength and Crest Position. 17 SECTION 6External Hyd
15、rodynamic Pressure19 1General 19 3External Pressure Components 19 5Pressures Accompanying the Dominant Load Component and Their Distribution 19 7Pressure Loading on the FE Model. 19 SECTION 7Internal Tank Pressure21 1General 21 3Pressure Components. 21 5Roll and Pitch Motions. 21 7Simultaneously Act
16、ing Tank Pressure 22 SECTION 8Acceleration and Motion-induced Loads.23 1General 23 3Local Acceleration. 23 5Inertial Loads in the Structural FE Model 23 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTN
17、o reproduction or networking permitted without license from IHS -,-,- ABS GUIDANCE NOTES ON DYNAMIC LOADING APPROACH AND DIRECT ANALYSIS FOR HIGH SPEED CRAFT . 2003vii SECTION 9Loading for Global Finite Element Model .25 1General 25 3Equilibrium Check . 25 5General Modeling Considerations. 25 SECTIO
18、N 10 Analysis of the Hull Structure27 1General 27 3Structural Members. 27 53-D Global Modeling 27 7 Analyses of Local Structure 28 SECTION 11 Acceptance Criteria31 1General 31 3Yielding 31 5Buckling and Ultimate Strength. 31 SECTION 12 Additional Considerations.33 1Slamming Loads General Considerati
19、ons . 33 3Global Slamming Effects. 33 5Local Impact Loads. 33 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentional
20、ly Left Blank Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 20:36:49 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDANCE NOTES ON DYNAMIC LOADING APPROACH AND DIRECT ANALYSIS FO
21、R HIGH SPEED CRAFT . 20031 S E C T I O N 1Introduction 1Background 1.1Types of High-Speed Craft Over the past decade (1990-2000), craft length, craft speed and installed engine power on high-speed craft have steadily increased. Most of the craft built over this period can be categorized into the thr
22、ee following groups: Monohulls Catamarans Wave-piercing catamarans An important trend in the above types of high-speed craft, in recent years, has been an increase in the length of craft that are being built. Most early high-speed craft were of the planing and semi-planing type, while the latter and
23、 most recent builds have been shifting into the domain of the semi-planing and displacement type. Although this has given rise to new technological challenges, it has also made it possible to apply well-established methods developed for conventional vessels to the design and analysis of these craft
24、with novel hull forms. Distinct from the design criteria used for planing or dynamically supported craft, where hydrodynamic impact loads governed the loading criteria, these changes have brought about a shift of emphasis in load types and combinations, with global loads playing a more significant r
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