ABS 73-2015 GUIDE FOR HULL CONDITION MONITORING SYSTEMS 2015.pdf

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1、 GUIDE FOR HULL CONDITION MONITORING SYSTEMS 2015 Guide to Color Coding Used in Online Version of the Guide The following summarizes the colors corresponding to Rule Changes, Corrigenda items and editorial changes in the Guide files which are available for download. Rule Changes: Changes effective 1

2、5 December 2015 NOTICE NO. 1 March 2016 (effective 1 March 2016) Corrigenda: Editorials: Editorial Changes Guide for Hull Condition Monitoring Systems GUIDE FOR HULL CONDITION MONITORING SYSTEMS 15 DECEMBER 2015 (Updated March 2016 see next page) American Bureau of Shipping Incorporated by Act of Le

3、gislature of the State of New York 1862 Copyright 2015 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA Updates March 2016 consolidation includes: December 2015 version plus Notice No. 1 Commentary Commentary The SOLAS Chapter V/Reg.20, as amended, requires that Voy

4、age Data Recorders (VDR) are to be installed on vessels on or after 1 July 2002*, (*an implementation schedule is set by IMO based on date of construction, type and/or size of vessels). This has affected the ABS Guide for Hull Condition Monitoring System, which necessitated implementing appropriate

5、changes to the Guide. Accordingly, the necessary changes occurred for the HM3 notation and are as follows: 1. “Voyage Data Recorders” (“VDR”) replaces the term “Voyage Data Monitors” (“VDM”) in order to align the Guides nomenclature with SOLAS. 2. Since Voyage Data Recorders (VDR) are mandatory, the

6、 Full VDM option is reclassified as VDR and the Qualified VDM option is deleted. 3. Approved by an Administration, VDRs would be acceptable in partial fulfillment for the HM3 VDR notation, provided that additional requirements set by the Guide above those required by IMO Res. A.861(20) are met. Thes

7、e are the existing requirements: a. Data recorded is to be kept for at least 24 hours (v.s. 12 hours for IMO) before it is overwritten. b. System is to operate from an uninterruptible power supply (UPS) with at least four (4) hours (v.s. 2 hours for IMO) backup. Foreword Foreword (15 December 2015)

8、This Guide discusses the need for the fitting of Hull Condition Monitoring Systems on vessels, describes the uses to which they and the data they acquire can be put, gives performance specifications for the various types of systems and lays down criteria against which ABS can award notations that wi

9、ll be entered in the ABS Record. It is applicable to all types and sizes of merchant vessels. The scope of the system, the nature of the display and the form and aims of data processing are largely decisions that should to be made by the vessels Owners in conjunction with the system suppliers. Howev

10、er, ABS is prepared and able to give advice and assistance in this respect. The condition monitoring systems covered by this Guide extend from simple one-motion monitoring systems to sophisticated voyage data recorders covering a multitude of hull, systems and machinery parameters. The overall Hull

11、Condition Monitoring process is one of: Data measurement Data collection and conditioning Data processing and evaluation Results presentation and storage The reason for fitting hull monitoring systems is to acquire, display and/or record information and then use the information as a basis for making

12、 decisions that will improve operational efficiency and/or safety. As ABS is primarily interested in the enhanced safety aspects that can be obtained by the correct use of monitoring systems, any vessel fitted with a system and complying with the requirements of this Guide will be awarded appropriat

13、e notations for entry in the ABS Record. The Performance Specification of a Hull Condition Monitoring system must depend to a large extent on what the system is intended to do. It is not possible in a Guide such as this to be specific about all possible systems. The Guide concentrates on what to do

14、rather than on how to do it. In some cases, there will be mutual benefit to ABS and the Owner for output to be made available to ABS for improving safety in accordance with the ABS mission. This will be the subject of separate discussions with the Owner. ABSGUIDE FOR HULL CONDITION MONITORING SYSTEM

15、S .2015 iii This edition of the Guide supersedes the 1995 Guide. It includes new notations to cover a broad range of hull monitoring aspects and requirements. See the table in 1/3.1. This Guide becomes effective on 15 December 2015. Users are advised to check periodically on the ABS website www.eagl

16、e.org to verify that this version of this Guide is the most current. We welcome your feedback. Comments or suggestions can be sent electronically by email to rsdeagle.org. iv ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 Table of Contents GUIDE FOR HULL CONDITION MONITORING SYSTEMS CONTENTS S

17、ECTION 1 General 1 1 Application 1 2 Scope 1 3 Symbols 1 3.1 HM1, HM2, HM3 1 3.2 +R 2 4 Information to be Submitted 2 5 Alternatives . 3 SECTION 2 System Type Requirements 4 1 HM1 Motion Monitoring 4 1.1 Application . 4 1.2 Slam Warning 4 1.3 Green Seas Warning . 5 1.4 Ship Motion . 5 1.5 Sea State

18、. 5 2 HM2 Stress Monitoring 6 2.1 Application . 6 2.2 Hull Girder Stress 6 2.3 Local Stress Monitoring . 7 2.4 Fatigue Monitor . 7 2.5 Loading Computer Data Link . 8 3 HM3 Voyage Data Monitoring 8 3.1 Application . 8 3.2 HM3 VDR . 8 3.3 HM3 Enhanced VDR 9 3.4 Navigation . 9 3.5 Wind 9 3.6 Shaft Moni

19、toring 10 3.7 Shore Data Link . 10 ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 v SECTION 3 System Requirements 11 1 General . 11 2 Sensors . 11 2.1 All Sensors 11 2.2 Strain Gauges 11 2.3 Accelerometers 11 3 Output . 11 3.1 Derivation 11 3.2 Displays . 12 3.3 Recording 12 4 Alarms . 12 5 Po

20、wer Interruption . 12 6 Operating Manual . 13 7 Verification Procedure . 13 SECTION 4 Installation 14 1 Electrical and Mechanical Systems 14 2 Power Supply 14 3 Sensors . 14 3.1 Physical Protection 14 3.2 Fitting . 14 4 Display, Processing and Recording Equipment 15 SECTION 5 Setup and Calibration 1

21、6 1 Setup . 16 1.1 Initial Settings 16 1.2 Setup Check 16 2 Calibration . 16 3 Thermal Stresses 16 3.1 Sensors . 16 3.2 Structure 16 SECTION 6 Survey Requirements . 17 APPENDIX 1 Guidance on Selection of Hull Monitoring Systems 18 1 Motion Monitoring . 18 2 Slam Warning . 18 3 Green Seas Warning 18

22、4 Ship Motion . 18 5 Stress Monitoring 19 5.1 Hull Girder Stress 19 5.2 Local Load Monitoring . 19 5.3 Fatigue Monitor 19 6 Voyage Data Recording 20 7 Derivation of Output 20 vi ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 8 Sensors . 20 9 Displays. 20 10 Recording 20 11 Training . 20 12 Fit

23、ting of Sensors 21 ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 vii This Page Intentionally Left Blank Section 1: General SECTION 1 General 1 Application This Guide is applicable to classed vessels for which any of the hull monitoring system notations indicated in Subsection 1/3 have been re

24、quested. 2 Scope This Guide covers hull monitoring systems used for motion monitoring, stress monitoring and voyage data monitoring. Monitors covered include those for collection of data over a period of time for subsequent evaluation ashore, and those for immediate interpretation of processed data

25、for use by vessels operating personnel. 3 Symbols (15 December 2015) 3.1 HM1, HM2, HM3 At the request of the Owners or Shipyard, a hull condition monitoring system which complies with the requirements of this Guide will be distinguished in the Record by the symbols HM1, HM2, HM3, as appropriate, fol

26、lowed by the appropriate notation such as Slam Warning, Green Seas Warning, Ship Motion, Sea State, Hull Girder Stress, Local Load Monitoring, Fatigue Monitor, LC (loading computer data link), VDR, Enhanced VDR, Navigation, Wind, Shaft Monitoring, and SL (shore data link). In addition, optional nota

27、tions specifying the required type of monitoring devices of the monitoring system in compliance with this Guide, together with a digit specifying the number of devices installed or the number of measurements, will also be assigned as needed. The symbols include: MOT (ship motion sensors), ACS (ship

28、acceleration sensors), PT (pressure transducers), ST (sea state monitoring devices), HS (hull girder strain gauges), LS (strain gauges for local stress monitoring), WD (wind state monitoring devices), TM (shaft torque meters), and RC (shaft revolution counters). For example, the class notation HM1 (

29、Slam Warning: ACS1, Ship Motion: MOT2, Sea State: ST1) is assigned to a vessel having the capability of slam warning with one accelerometer monitoring the acceleration along one axis, two devices monitoring ship motion and one device monitoring the sea state. The notations and symbols are demonstrat

30、ed in the following table. Symbols Descriptive Notations Optional Notations* HM1 Slam Warning ACS, PT Green Seas Warning - Ship Motion ACS, MOT Sea State ST HM2 Hull Girder Stress HS Local Load Monitoring LS Fatigue Monitor - LC - ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 1 Section 1 Gene

31、ral Symbols Descriptive Notations Optional Notations* HM3 VDR - Enhanced VDR - Navigation - Wind WD Shaft Monitoring TM, RC SL - * Optional notations are followed by a digit specifying the number of sensors (or devices) installed. 3.2 +R At the request of the Owners or Shipyard, a hull condition mon

32、itoring system receiving any of the symbols indicated in 1/3.1 which complies with the requirements of this Guide and has provisions for recording data for later evaluation will be distinguished in the Record by adding the symbols +R directly after the symbols indicated 1/3.1 (e.g., HM2+R). Addition

33、al requirements on the recorded data for symbols HM2+R are specified in 2/2.2.4. For vessels with the SL notation (2/3.7) and where it can be established that the data link to onshore facilities provides the capacity to record the measured data onshore for later evaluation, the +R symbol will be awa

34、rded. 4 Information to be Submitted The following plans and information are to be submitted: General Arrangement Structural Plans and Analysis appropriate to the purpose of the monitor and the location of the gauges. Structural plans will not generally be required to be submitted for the approval of

35、 HM1 systems. ABS will advise which plans and analyses are required for the approval of HM2 and HM3 systems when the Request for Class is received. A block diagram and description illustrating the operation of the system. Details of the sensor accuracy, range, frequency response and any Type Approva

36、ls of the sensors. Description of the methods used to process the data for display. Description of the derivation of the display warning criteria. Description and visual simulation of the method of display of the output. Procedure for installing the sensors. Procedure for setting up and testing the

37、sensors. Procedure for system testing. Description of the method and capability of the data recording system. The Operations Manual for the system. Operational verification procedure Plans are generally to be submitted in triplicate, except that where attendance of the Surveyor is required at the ma

38、nufacturers plant, submittals are required in quadruplicate. In some cases, ABS may request the submission of additional information when it is considered necessary to review particular features of a Hull Condition Monitoring system. 2 ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 Section 1 G

39、eneral 5 Alternatives ABS will consider arrangements which can be shown to be effective in meeting the overall standards of the Guide. ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 3 Section 2: System Type Requirements SECTION 2 System Type Requirements 1 HM1 Motion Monitoring 1.1 Application

40、 Where requested by the owner, the symbols HM1 and the appropriate notation such as Green Seas Warning will be assigned to vessels having hull condition monitoring systems for motion monitoring in compliance with this Subsection. For the purpose of this Subsection, motion monitoring systems measure

41、rotational and/or translational movement using motion monitoring devices such as accelerometers, vertical reference gyroscopes, pitot and Doppler logs, wave height sensors and servo inclinometers. Motion monitoring systems are to be identified by their main function or purpose, and it is this that w

42、ill form the descriptive part of the notation awarded, as indicated in the following paragraphs. Requirements for the most common types of systems are provided in 2/1.2, 2/1.3 and 2/1.4. 1.2 Slam Warning 1.2.1 System Requirements The Slam Warning monitor is to warn the vessels operating personnel in

43、 advance that the vessel is in sea or operating conditions approaching those that could induce wave slams that could lead to either local or hull girder structural damage. Slam warning monitors are to show the trend over time in relation to the slam wave impact that would exceed the selected warning

44、 levels. 1.2.2 Warning Levels Structural damage warning levels on displays and alarm levels are to be set taking into account the approved scantlings and their conditions of approval. The criteria to judge the approaching occurrence of slams is to be derived from calculations, model tests or full-sc

45、ale trial results, and are to be submitted for review. The method for deriving the criteria is to reflect the operations of the type of vessel being fitted. 1.2.3 Sensor Types Slam warning is to be carried out by the use of accelerometers measuring the vertical bow motion or pressure transducers mea

46、suring the relative motions of the vessel and the sea surface. Acceptable methods of identifying impacts include: 1.2.3(a) Accelerometers (15 December 2015). The accelerometers are to be capable of recognizing a decaying vibratory shape on the acceleration signal at the frequency of the 2-node mode

47、of vibration of the vessel using spectral analysis or other techniques. The severity of the impact is indicated by the amplitude of the vibration. Measurement signals are to be processed and displayed on the bridge for monitoring accelerations, including vibrations extractable from acceleration data

48、. An optional notation ACS, together with a digit can be assigned to indicate the installation of accelerometers monitoring acceleration along one axis for slam monitoring, and the number of accelerometers installed. For example, ACS1 indicates that one sensor is installed monitoring acceleration al

49、ong one axis. 1.2.3(b) Pressure Transducers (15 December 2015). The deployment of pressure gauges is to cover the slamming impact areas, such that gauges are able to emerge from the water. The severity of impact is indicated by the re-entry pressure. An optional notation PT together with a digit can be assigned to indicate the installation and the number of pressure transducers for slam monitoring purposes. 4 ABSGUIDE FOR HULL CONDITION MONITORING SYSTEMS .2015 Section 2 System Type Requirements 1.3 Green Seas Warnin