ABS 140 NOTICE 1-2013 GUIDE FOR SAFEHULL-DYNAMIC LOADING APPROACH FOR VESSELS.pdf

1、 ABSGUIDE FOR SAFEHULL-DYNAMIC LOADING APPROACH FOR VESSELS .2006 1 GUIDE FOR SAFEHULL-DYNAMIC LOADING APPROACH FOR VESSELS DECEMBER 2006 NOTICE NO. 1 August 2013 The following Changes become EFFECTIVE AS OF 1 AUGUST 2013. (See http:/www.eagle.org for the consolidated version of the Guide for SafeHu

2、ll-Dynamic Loading Approach for Vessels, 2006, 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. (See 1-1-4/3.3 of the ABS Rules for Conditions of Classif

3、ication (Part 1).) SECTION 15 ACCEPTANCE CRITERIA 3 Yielding (Revise Paragraph 15/3.7 and Section 15, Table 1, as follows.) 3.7 Allowable Stress for Watertight Boundaries (1 August 2013) The allowable stresses defined in Section 15, Table 1 are applicable to plating and longitudinal stiffeners on wa

4、tertight boundaries. With the recommended basic mesh size of one-longitudinal spacing for global FE model, the tertiary bending stress component due to local deformation within one-longitudinal spacing may not be accounted for on watertight boundaries. If such is the case, a reduction of allowable s

5、tress needs to be considered for watertight boundaries. The allowable stress is defined as a percentage of the minimum specified yield stress, fy, times the strength reduction factor, Sm. Application of this allowable stress to rod and beam elements is based on axial stress while von Mises membrane

6、stresses are checked for plate elements. TABLE 1 Allowable Stresses for Watertight Boundaries (1 August 2013) Stress Limit Ordinary Strength Steel (Sm= 1.000) HT27 (Sm= 0.980) HT32 (Sm= 0.950) HT36 (Sm= 0.908) c cfSmfy 23534 ccf25947 ccf29810 ccf32056 ccfN/cm22400 ccf2646 ccf3040 ccf3269 ccfkgf/cm23

7、4138 ccf37637 ccf43241 ccf46498 ccflbf/in2Note: cfis to be taken as 0.95 cis to be taken as 0.80 Notice No. 1 August 2013 2 ABSGUIDE FOR SAFEHULL-DYNAMIC LOADING APPROACH FOR VESSELS .2006 Alternatively, for watertight boundaries under lateral load, the von-Mises stress may be determined using the tertiary plate bending stresses from the applicable Chapter of Part 5C of the Steel Vessel Rules. When the tertiary stress is included, ccan be taken as 1.0.