ABS 2 NOTICE 1-2016 RULES FOR BUILDING AND CLASSING STEEL VESSELS 2016.pdf
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1、 RULES FOR BUILDING AND CLASSING STEEL VESSELS 2016 NOTICE NO. 1 JULY 2016 The following Rule Changes were approved by the ABS Rules Committee on 23 May 2016 and become EFFECTIVE AS OF 1 JULY 2016. (See http:/www.eagle.org for the consolidated version of the Rules for Building and Classing Steel Ves
2、sels 2016, 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.) PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HUL
3、L STRUCTURES AND ARRANGEMENTS SECTION 13 STEMS, STERN FRAMES, RUDDER HORNS, AND PROPELLER NOZZLES 5 Rudder Horns (Add new Paragraphs 3-2-13/5.5 and 3-2-13/5.7, as follows:) 5.5 Rudder Horn Plating (1 July 2016) The thickness of the rudder horn side plating is not to be less than: t = 2.4 Lk mm t = 0
4、.522 Lk in. where L = length of vessel, as defined in 3-1-1/3.1 k = K as defined in 3-2-14/1.3 for castings = 1.0 for ordinary strength hull steel plate = Q as defined in 3-2-1/5.5 for higher strength steel plate 5.7 Welding and Connection to Hull Structure (1 July 2016) The following requirements a
5、re to apply: i) The rudder horn plating is to be effectively connected to the aft ship structure (e.g., by connecting the plating to side shell and transverse/longitudinal girders) in order to achieve a proper transmission of forces, see 3-2-13/Figure 4. When the connection between the rudder horn a
6、nd the hull structure is designed as a curved transition into the hull plating, special consideration should be given to the effectiveness of the rudder horn plate in bending and to the stresses in the transverse web plates ii) Where the rudder horn does not have curved transitions into the shell pl
7、ating, brackets or stringer are to be fitted internally in horn, in line with outside shell plate, as shown in 3-2-13/Figure 4. ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2016 1 Notice No. 1 July 2016 iii) Transverse webs of the rudder horn are to be led into the hull up to the next deck or f
8、lat in a sufficient number. iv) Strengthened plate floors are to be fitted in line with the transverse webs in order to achieve a sufficient connection with the hull. v) Where a centerline bulkhead (wash-bulkhead) is fitted in the after peak, it is to be connected to the rudder horn. vi) Scallops ar
9、e to be avoided in way of the connection between shell plating and transverse webs in line with the aft face of the rudder horn and the webs in the rudder horn. vii) The weld at the connection between the rudder horn plating and the side shell is to be full penetration. The welding radius is to be a
10、s large as practicable and may be obtained by grinding. (Renumber Paragraphs 3-2-13/5.5 through 3-2-13/5.9 as 3-2-13/5.9 through 3-2-13/5.13.) (Add new 3-2-13/Figure 4, as follows:) FIGURE 4 Connection of Rudder Horn to Aft Ship Structure (1 July 2016) (Renumber existing 3-2-13/Figure 4 as 3-2-13/Fi
11、gure 5.) 2 ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2016 Notice No. 1 July 2016 PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS SECTION 14 RUDDERS AND STEERING EQUIPMENT 1 General (Revise Paragraph 3-2-14/1.1, as follows:) 1.1 Application (1 July 2016) Requ
12、irements specified in this Section are applicable to: i) Ordinary profile rudders described in 3-2-14/Table 1A with rudder operating angle range from 35 to +35. ii) High-lift rudders described in 3-2-14/Table 1B, the rudder operating angle of which might be exceeding 35 on each side at maximum desig
13、n speed. iii) Other steering equipment other than rudders identified in Section 3-2-14. Rudders not covered in 3-2-14/Table 1A nor in 3-2-14/Table 1B are subject to special consideration, provided that all the required calculations are prepared and submitted for review in full compliance with the re
14、quirements in this section. Where direct analyses adopted to justify an alternative design are to take into consideration all relevant modes of failure, on a case by case basis. These failure modes may include, amongst others: yielding, fatigue, buckling and fracture. Possible damages caused by cavi
15、tation are also to be considered. Validation by laboratory tests or full scale tests may be required for alternative design approaches. Rudders and other steering equipment provided on Ice Classed vessels are subject to additional requirements specified in 6-1-4/31 or 6-1-5/41, as applicable. (Revis
16、e 3-2-14/Table 1B, as follows:) Coefficient kcfor High-Lift/Performance Rudders (1 July 2016) Profile Type kcAhead Condition Astern Condition 1 Fish tail (e.g., Schilling high-lift rudder) 1.4 0.8 2 Flap rudder (or Twisted rudder of Cat. 3) 1.7 1.3 (if not provided) 3 Rudder with steering nozzle 1.9
17、 1.5 (Renumber 3-2-13/Figure 1 as 3-2-13/Figure 1A.) FIGURE 1A Rudder Blade without Cutouts (2009) ABSRULES FOR BUILDING AND CLASSING STEEL VESSELS .2016 3 Notice No. 1 July 2016 (Renumber 3-2-13/Figure 2 as 3-2-13/Figure 1B.) FIGURE 1B Rudder Blade with Cutouts (2009) 7 Rudder Stocks (2012) (Revise
18、 Paragraph 3-2-14/7.5, as follows:) 7.5 Rudder Trunk and Rudder Stock Sealing (1 July 2016) i) In rudder trunks which are open to the sea, a seal or stuffing box is to be fitted above the deepest load waterline, to prevent water from entering the steering gear compartment and the lubricant from bein
19、g washed away from the rudder carrier. ii) Where the top of the rudder trunk is below the deepest waterline two separate stuffing boxes are to be provided. iii) Materials. The steel used for the rudder trunk is to be of weldable quality, with a carbon content not exceeding 0.23% on ladle analysis an
20、d a carbon equivalent (Ceq) not exceeding 0.41. Plating materials for rudder trunks are in general not to be of lower grades than corresponding to class II as defined in 3-1-2/Table 1. Rudder trunks comprising of materials other than steel are to be specially considered. iv) Scantlings. Where the ru
21、dder stock is arranged in a trunk in such a way that the trunk is stressed by forces due to rudder action, the scantlings of the trunk are to be such that the equivalent stress due to bending and shear does not exceed 0.35F, and the bending stress on welded rudder trunk is to be in compliance with t
22、he following formula: 80/k N/mm2 8.17/k kgf/mm2 11,600/k psi where = bending stress in the rudder trunk k = K as defined in 3-2-14/1.3 for castings = 1.0 for ordinary strength hull steel plate = Q as defined in 3-2-1/5.5 for higher strength steel plate k is not to be taken less than 0.7 F= specified
23、 minimum yield strength of the material used, in N/mm2(kgf/mm2, psi) For calculation of bending stress, the span to be considered is the distance between the mid-height of the lower rudder stock bearing and the point where the trunk is clamped into the shell or the bottom of the skeg. v) Welding at
24、the Connection to the Hull. The weld at the connection between the rudder trunk and the shell or the bottom of the skeg is to be full penetration and fillet shoulder is to be applied in way of the weld. The fillet shoulder radius r, in mm (in.) (see 3-2-14/Figure 2) is to be as large as practicable
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