1、 RULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT 2017 NOTICE NO. 1 July 2017 The following Rule Changes were approved by the ABS Rules Committee on 30 May 2017 and become EFFECTIVE AS OF 1 JULY 2017. (See http:/www.eagle.org for the consolidated version of the Rules for Building and Classing
2、High-Speed Naval Craft 2017, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction, unless otherwise noted. (See 1-1-4/3.3 of the ABS Rules for Conditions of C
3、lassification High-Speed Craft (Part 1).) PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS SECTION 8 RUDDERS AND STEERING EQUIPMENT 17 Double Plate Rudder (Revise Paragraph 3-2-8/17.1 and add new 3-2-8/Figures 5, 6, and 7, as follows:) 17.1 Strength (1 July 2017) The
4、 section modulus and web area of the rudder mainpiece are to be such that the stresses indicated in the following Subparagraphs are not exceeded. In calculating the section modulus of the rudder, the effective width of side plating is to be taken as not greater than twice the athwartship dimension o
5、f the rudder. Bolted cover plates on access openings to pintles are not to be considered effective in determining the section modulus of the rudder. In order for a cover plate to be considered effective, it is to be closed using a full penetration weld and confirmed suitable by non-destructive testi
6、ng method. Generous radii are to be provided at abrupt changes in section where there are stress concentrations, including in way of openings and cover plates. When inspection windows are located in the panel below the rudder hub, the stress is to be as permitted in way of cutouts. Moments, shear fo
7、rces and reaction forces are to be as given in 3-2-8/7.7 and 3-2-8/13.5. For spade rudders and rudders with horns, the section modulus at the bottom of the rudder is not to be less than one-third the required section modulus of the rudder at the top of the rudder or at the center of the lowest pintl
8、e. Special attention is to be paid in design and construction of rudders with slender foil sections in the vicinity of their trailing edge (e.g., hollow foil sections, fishtail foil sections). Where the width of the rudder blade at the aftermost vertical diaphragm, w, is equal or less than 1/6of the
9、 trailing edge length measured between the diaphragm and the trailing edge, , finite element vibration analysis of the rudder blade is also to be submitted for review. See 3-2-8/Figure 5. ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 1 Notice No. 1 July 2017 FIGURE 5 (1 July 2017)
10、wSpade rudders with an embedded rudder trunk are to have a trailing edge with dimensions that satisfy the following requirements: i) For a rudder trailing edge having a monotonous transition to a rounded end with a finite thickness or diameter (see 3-2-8/Figure 6), the vortex shedding frequency calc
11、ulated using the equation given below is to be higher than 35 Hz. fs= TDUSTDt +where fs= vortex shedding frequency, in Hz U = flow velocity, in m/s (ft/s), which is taken as crafts design speed with craft running ahead at the maximum continuous rated shaft rpm and at the summer load waterline St= no
12、minal Strouhal number = 0.18 D= 0.27 C = minimal chord length of rudder cross section profile, in m (ft) D = nominal boundary layer thickness at trailing edge = 0.01C T= 0.77 T = thickness or diameter of rounded end, in m (ft) FIGURE 6 (1 July 2017) Thickness or Diameter of Rounded End2 ABSRULES FOR
13、 BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 Notice No. 1 July 2017 ii) For a rudder trailing edge with a flat insert plate (see 3-2-8/Figure 7), the insert plate thickness, t0, is to be no larger than 1.5Vdin mm, where Vdis the design speed in ahead condition, in knots, as defined in 3-2-8/3
14、.1. The extension beyond the weld to rudder plate, , is to satisfy the following 3-2-8/Figure 7 and with consideration of possible local vibratory bending of the insert plate. FIGURE 7 (1 July 2017) Insert Plate Thicknesst0Rudder Plate Thicknesst1 (t0+ 2t1)Alternatively, a vibration analysis is to b
15、e carried out to confirm that the natural frequency of the rudder is to be at least 20% away from the vortex shedding frequency preferably determined using either a detailed numerical analysis method such as CFD or testing for ballast and full draft at 85% and 100% Vdas defined in 3-2-8/3.1. (Renumb
16、er existing 3-2-8/Figures 5 and 6 as 3-2-8/Figures 8 and 9.) (Revise Subparagraph 3-2-11/17.1.2, as follows:) 17.1.2 In way of Cut-outs Allowable stresses for determining the rudder strength in way of cutouts (see 3-2-8/Figure 8) are as follows: Bending stress b= K/Q N/mm2(kgf/mm2, psi) Shear stress
17、 = K/Q N/mm2(kgf/mm2, psi) Equivalent stress e= 223 +b= Ke/Q N/mm2(kgf/mm2, psi) where SI units MKS units US units K75 7.65 10,900 K50 5.1 7,300 Ke100 10.2 14,500 Q = as defined in 3-2-1/1.1.1 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 3 Notice No. 1 July 2017 FIGURE 8 Z6r26r16r
18、1r26r2XNote:r1= corner radius of rudder plate in way ofportable bolted inspection holer2= corner radius of rudder plateIn way ofcutoutsr1The mainpiece of the rudder is to be formed by the rudder side plating (but not more than the effective width indicated above) and vertical diaphragms extending th
19、e length of the rudder or the extension of the rudder stock or a combination of both. PART 4 CRAFT SYSTEMS AND MACHINERY CHAPTER 2 PRIME MOVERS SECTION 1 DIESEL ENGINES 13 Testing, Inspection and Certification of Diesel Engines 13.11 Shop Tests of Internal Combustion, I.C. Engines (1 July 2016) 13.1
20、1.2 Engines Driving Propellers or Impellers Only (Revise Item 4-2-1/13.11.2iv), as follows:) iv) (1 July 2017) 90% (or normal continuous cruise power), 75%, 50% and 25% of rated power, in accordance with the nominal propeller curve (the sequence to be selected by the engine manufacturer). 4 ABSRULES
21、 FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 Notice No. 1 July 2017 (Revise 4-2-1/Table 1, as follows:) TABLE 1 Required Material and Nondestructive Tests of Diesel Engine Parts(1)(1 July 2017) Engine Part Material Properties (2)Nondestructive Tests for which purpose, plans and data as re
22、quired by 4-2-2/1.5 are to be submitted to ABS for approval, showing compliance with the requirements of this Section. A unit of the same type is to be satisfactorily containment and type tested, as required by 4-2-2/5.3 and 4-2-2/5.7. ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017
23、9 Notice No. 1 July 2017 ii) Turbochargers of category C are to be surveyed during their construction for compliance with the design approved, along with, but not limited to, material tests, hydrostatic tests, dynamic balancing, performance tests, etc., as indicated in 4-2-2/11.1, all to be carried
24、out to the satisfaction of the Surveyor. iii) Each turbocharger required to be certified by 4-2-2/1.1 is to be delivered with certificates indicating compliance with the requirements of this section and the applicable type approval. 11.3.2 Approval Under the Type Approval Program 11.3.2(a) Product D
25、esign Assessment. Upon application by the manufacturer, each model of a type of turbocharger is to be design assessed as described in 1-1-A2/5.1. For this purpose, each design of a turbocharger type is to be approved in accordance with 4-2-2/11.3.1i). Turbochargers so approved may be applied to ABS
26、for listing on the ABS website as Products Design Assessed. Once listed, and subject to renewal and updating of the certificate as required by 1-1-A2/5.7, turbocharger particulars will not be required to be submitted to ABS each time the turbocharger is proposed for use on board a craft. 11.3.2(b) M
27、anufacturing Assessment for Turbochargers. A manufacturer of turbochargers, who operates a quality assurance system in the manufacturing facilities, may apply to ABS for quality assurance assessment described in 1-1-A3/5.3.1(a) (Manufacturers Procedure), 1-1-A3/5.3.1(b) (RQS) or 1-1-A3/5.5 (PQA (IAC
28、S UR Z26 Alternative Certification Scheme). Upon satisfactory assessment under 1-1-A2/5.5 (PQA), turbochargers produced in those facilities will not require a Surveyors attendance at the tests and inspections indicated in 4-2-2/11.3.1ii). Such tests and inspections are to be carried out by the manuf
29、acturer whose quality control documents will be accepted. Certification of each turbocharger will be based on verification of approval of the design and on continued effectiveness of the quality assurance system. See 1-1-A2/5.7.1(a). Audits under PQA are to include: Chemical composition of material
30、for the rotating parts Mechanical properties of the material of a representative specimen for the rotating parts and the casing UT and crack detection of rotating parts Dimensional inspection of rotating parts Rotor balancing Hydrostatic pressure testing Overspeed testing. 11.3.2(c) Type Approval Pr
31、ogram. Turbocharger types which have their designs approved in accordance with 4-2-2/11.3.2(a) and the quality assurance system of their manufacturing facilities approved in accordance with 4-2-2/11.3.2(b) will be deemed Type Approved and will be eligible for listing on the ABS website as Type Appro
32、ved Products. 10 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 Notice No. 1 July 2017 PART 4 CRAFT SYSTEMS AND MACHINERY CHAPTER 3 PROPULSION AND MANEUVERING MACHINERY SECTION 4 STEERING GEARS 13 Control Systems 13.1 General (1 July 2011) (Add new Subparagraph 4-3-4/13.1.9, as foll
33、ows:) 13.1.9 System Response Under Failure (1 July 2017) The failures (as listed, but not limited to those items in 4-3-4/Table 1) likely to cause uncontrolled movements of rudder are to be clearly identified. In the event of detection of such failure, the rudder should stop in the current position.
34、 Alternatively, the rudder may be set to return to the midship/neutral position. Failure Mode and Effect Analysis methodology may be used to identify the failures. (Revise 4-3-4/Table 1, as follows:) TABLE 1 Steering Gear Instrumentation (1 July 2017) Monitored Parameters Display/Alarm Location a) R
35、udder angle indicator (1)Display Navigation bridge Steering gear compartment b) Power unit motor running Display Navigation bridge Engine room control station c) Power unit power supply failure Alarm Navigation bridge Engine room control station d) Power unit motor overload (2)Alarm Navigation bridg
36、e Engine room control station e) Power unit motor phase failure (2), (3)Alarm Navigation bridge Engine room control station f) Control power failure Alarm Navigation bridge Engine room control station g) (1 July 2017) Hydraulic oil reservoir low level (2)Alarm Navigation bridge Engine room control s
37、tation h) Hydraulic lock (4)Alarm Navigation bridge i) Auto-pilot running (5)Display Navigation bridge j) Auto-pilot failure (5)Alarm Navigation bridge k) Steering mode (autopilot/manual) indication Display Navigation bridge l) Automatic autopilot (5)override failure Alarm Navigation bridge m) Autom
38、atic autopilot (5)override activated Alarm Navigation bridge n) (1 July 2011) Loop failures (6)Alarm Navigation bridge o) (1 July 2011) Computer-based system failures (7)Alarm Navigation bridge p) (1 July 2017) Earth fault on AC and DC circuits Alarm Navigation bridge q) (1 July 2017) Deviation betw
39、een rudder order and feedback Alarm Navigation bridge (Notes remain unchanged.) ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAVAL CRAFT .2017 11 Notice No. 1 July 2017 PART 4 CRAFT SYSTEMS AND MACHINERY CHAPTER 3 PROPULSION AND MANEUVERING MACHINERY SECTION 5 THRUSTERS 1 General (Revise Paragraph
40、4-3-5/1.1, as follows:) 1.1 Application (1 July 2017) The provisions of this Section apply to maneuvering thrusters not intended to assist in propulsion, and to azimuthal and non-azimuthal thrusters (and to alternative propulsion and steering systems without a rudder, as applicable) intended for pro
41、pulsion maneuvering, or a combination of these duties. Maneuvering thrusters intended to assist maneuvering, where fitted, may, at the request of the owners, be certified in accordance with the provisions of this section. In such cases, appropriate class notations, as indicated in 4-3-5/1.3, will be
42、 assigned upon verification of compliance with corresponding provisions of this section. Thrusters intended for propulsion with or without combined duties for assisting in maneuvering are to comply with appropriate provisions of this section in association with other relevant provisions of Part 4, C
43、hapter 3. Thrusters are to be constructed with sufficient strength, capacity and the necessary supporting systems to provide reliable propulsion and steering to the craft in all operating conditions. Special consideration will be given to the suitability of any essential component which is not dupli
44、cated. For a craft fitted with multiple steering systems, each steering system is to be so arranged that the failure of one of them will not render the other one inoperative. Each of the steering systems is equipped with its own dedicated steering gear, provided that each of the steering systems is
45、fulfilling the requirements for main steering gear (as given in 4-3-5/5.12.1) and each of the steering systems is provided with an additional function for positioning and locking the failed steering system in a neutral position after a failure of its own power unit(s) and actuator(s). 1.5 Definition
46、s (Add new Subparagraph 4-3-5/1.5.6, as follows:) 1.5.6 Steering System (1 July 2017) “Steering system” is a crafts directional control system, including main steering gear, auxiliary steering gear, steering gear control system and rudder, if any. 12 ABSRULES FOR BUILDING AND CLASSING HIGH-SPEED NAV
47、AL CRAFT .2017 Notice No. 1 July 2017 5 Design 5.12 Arrangements (1 July 2016) 5.12.2 Auxiliary Steering Gear Arrangements (Revise Item 4-3-5/5.12.2(b)iii), as follows:) 5.12.2(b) In a craft fitted with multiple steering systems, such as but not limited to azimuthing thrusters or water jet propulsio
48、n systems, an auxiliary steering gear need not be fitted, provided that: i) For a passenger craft, each of the steering systems, is capable of satisfying the requirements in 4-3-5/5.12.1ii) while any one of the power units is out of operation; ii) For a cargo craft, each of the steering systems, is
49、capable of satisfying the requirements in 4-3-5/5.12.1ii) while operating with all power units; iii) (1 July 2017) Each of the steering systems is arranged so that after a single failure in its piping or in one of the power units, crafts steering capability (but not individual steering system operation) can be maintained or speedily regained (e.g., by the possibility of positioning the failed steering system in a neutral position in an emergency, if needed). The above capacity req
