Technical and Research Bulletin 3-51 - Amazon Web Services

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UNIT CONVERSIONS The original document contained only English units. Metric units are now provided as well. Where the values in English units are general the converted values are rounded and approximate, but where precise numbers were given precision was maintained. ACKNOWLEDGEMENTS The panel acknowledges the cooperation and assistance of the following personnel and organizations that co-authored portions of this document: D. Sverko American Bureau of Shipping P. Diehl Diehl Engineering Co. R. Greene Electric Boat Corporation J. Bordeaux John J. McMullen Associates, Inc. W. Daube John J. McMullen Associates, Inc. B. Cowper LamaLo Technology L. Douthwaite Lloyd’s Register R. Kaminsky Naval Sea Systems Command J. Reed Naval Surface Warfare Center D. Norton Seaworthy Systems, Inc. K. Danahy US Coast Guard The final manuscript was prepared for release by Beda Angelo I. Pormentilla, Intern at SNAME Headquarters, 2003 to 2007. DISCLAIMER It is understood that nothing expressed herein is intended or shall be construed to give any person, firm, or corporation any right, remedy, or claim against SNAME or any of its officers or members. iii
TABLE OF CONTENTS SECTION 1.0 INTRODUCTION 1 PAGE 1.1 INTRODUCTION AND DEFINITION OF PROPULSION SHAFTING 1 SYSTEM ALIGNMENT 1.2 HISTORICAL PERSPECTIVE 1 1.3 PURPOSE OF THE ALIGNMENT GUIDE 2 SECTION 2.0 DESCRIPTION OF MARINE SHAFTING SYSTEMS 3 SECTION 3.0 THE IMPORTANCE OF PROPER PROPULSION SHAFTING 5 SYSTEM ALIGNMENT SECTION 4.0 CRITERIA FOR THE ACCEPTABLE ALIGNMENT OF A 6 MARINE PROPULSION SHAFTING SYSTEM SECTION 5.0 FACTORS THAT AFFECT THE ALIGNMENT OF MARINE 10 PROPULSION SHAFTING SYSTEMS 5.1 FACTORS THAT AFFECT THE ANALYSIS OF THE SHAFT ALIGNMENT 10 A. FLEXIBILITY OF THE SHAFTING SYSTEM 10 B. THERMAL GROWTH 12 C. WEARDOWN OF WATERBORNE BEARINGS 13 D. DRYDOCK VERSUS WATERBORNE ALIGNMENT 14 E. BALLAST, CARGO AND FUEL LOADS 15 F. VESSEL DESIGN 15 G. PROPULSOR HYDRODYNAMIC EFFECTS AND THE BORE SLOPE AT THE AFTERMOST BEARING 16 H. SHIP SPEED AND POWER 16 I. DYNAMIC CONDITIONS 16 J. DEFLECTION OF THE MAIN THRUST BEARING AND FOUNDATION 17 K. EFFECT OF PRESSURE AND TEMPERATURE AT DEPTH FOR SUBMERSIBLE VESSELS 17 5.2 FACTORS THAT AFFECT ALIGNMENT MEASUREMENTS 17 A. HULL TEMPERATURE 17 B. STRUCTURAL WORK 18 C. TRANSIENT SHIP OPERATING CONDITIONS AND SEA CONDITIONS 18 D. JOURNAL ALIGNMENT ISSUES 18 SECTION 6.0 DEVELOPING THE DESIGN ALIGNMENT 19 6.1 THE DESIGN ALIGNMENT PROCESS 19 6.2 CREATING A MATHEMATICAL MODEL iv 20
Page 1 and 2: T & R echnical esearch Bulletin 3-5
Page 3: T&R Bulletin 3-51 has been prepared
Page 7 and 8: FIGURES 1a. TYPICAL SHAFTING SYSTEM
Page 9 and 10: 1.3 PURPOSE OF THE ALIGNMENT GUIDE
Page 11 and 12: for vibration, shaft strength, and
Page 13 and 14: SECTION 4.0 CRITERIA FOR THE ACCEPT
Page 15 and 16: load. This is particularly true for
Page 17 and 18: SECTION 5.0 FACTORS THAT AFFECT THE
Page 19 and 20: coefficients over 1000 lbf/mil (175
Page 21 and 22: ending stress within limits. Howeve
Page 23 and 24: earings experience weardown, while
Page 25 and 26: . Structural work. Structural work,
Page 27 and 28: 6.2 CREATING A MATHEMATICAL MODEL T
Page 29 and 30: Bearing Forward bull gear Forward b
Page 31 and 32: offsets for a particular ship condi
Page 33 and 34: 6.7 CALCULATING THE BUILDER’S SET
Page 35 and 36: SECTION 7.0 METHODS FOR MEASURING T
Page 37 and 38: the bull gear bearings caused by th
Page 39 and 40: system is not accessible between a
Page 41 and 42: This gap and sag method is adequate
Page 43 and 44: The accuracy of the wire method can
Page 45 and 46: c. Clearance measurements: If the a
Page 47 and 48: SECTION 9.0 ADJUSTING THE SHAFT ALI
Page 49 and 50: (4) when misalignment is suspected
Page 53 and 54: DEFLECTION (IN) MOMENT (FT-LB) SHEA
Page 55 and 56:
Load On Jack (Thousand Pounds) Load
Page 57 and 58:
GAGE NO. 1 GAGE NO. 2 GAGE NO. 1 GA
Page 59 and 60:
REFERENCES 1. Xu, M., “Shaft Alig
Page 61 and 62:
Edgecombe, M., B. Cowper, et. al.,
Page 63:
Vassilopoulos, L., “The Influence
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Technical and Research Bulletin 3-51 - Amazon Web Services

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