Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 3 Structural Design Principles - Section 7 Structural Idealisation - 2 Plates |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() 2 Plates2.1 Idealisation of EPP 2.1.1 EPP An elementary plate panel (EPP) is the unstiffened part of the plating between stiffeners and/or primary supporting members. The plate panel length, a, and breadth, b, of the EPP are defined respectively as the longest and shortest plate edges, as shown in Figure 17. Figure 17 : Elementary Plate Panel (EPP) definition ![]() 2.1.2 Strake required thickness The required thickness of a plate strake is to be taken as the greatest value required for each EPP within that strake. The requirements given in Table 3 are to be applied for the selection of strakes to be considered as shown in Figure 18. The maximum corrosion addition within a strake is to be applied according to Ch 3, Sec 3, [1.2.4]. Table 3 : Strake considered in a given EPP
Figure 18 : Strake considered in a given EPP ![]() where: a1 : Distance, in mm, measured inside the considered strake in the direction of the long edge of the EPP, between the strake boundary weld seam and the EPP edge. 2.1.3 For direct strength assessment, the EPP is idealised with the mesh arrangement in the finite element model. 2.2 Load calculation point 2.2.1 Yielding For the yielding check, the local pressure and hull girder stress, used for the calculation of the local scantling requirements are to be taken at the Load Calculation Point (LCP) having coordinates x, y and z as defined in Table 4. Table 4 : LCP coordinates for yielding
Figure 19 : Load calculation point (LCP) for longitudinal framing ![]() Figure 20 : Load calculation point for transverse framing ![]() Figure 21 : Load calculation point for horizontal framing on transverse vertical structure ![]() Figure 22 : Load calculation point for vertical framing on transverse vertical structure ![]() 2.2.2 Buckling For the prescriptive buckling check of the EPP according to Ch 8, Sec 3, the LCP for the pressure and for the hull girder stresses are defined in Table 5. For the FE buckling check, Ch 8, Sec 4 is applicable. Table 5 : LCP coordinates for plate buckling
Figure 23 : LCP for plate buckling – hull girder stresses ![]() |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|