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 7 Direct Strength Analysis - Section 1 Strength Assessment - 1 General

1 General

1.1 Application

1.1.1 This chapter provides requirements applicable to ships having rule length L of 150 m or above to assess the scantlings of the hull structure using finite element analysis.

1.1.2 The finite element analysis consists of three parts:
  • a) Cargo hold analysis to assess the strength of longitudinal hull girder structural members, primary supporting structural members and bulkheads.
  • b) Fine mesh analysis to assess detailed stress levels in local structural details.
  • c) Very fine mesh analysis to assess the fatigue capacity of the structural details according to Ch 9.
1.1.3 The strength assessment performed with finite element analysis is to verify that the scantlings comply with the acceptance criteria specified in this chapter for:
  • Cargo hold structural analysis performed in accordance with Ch 7, Sec 2.
  • Local structural analysis performed in accordance with Ch 7, Sec 3.

1.1.4 Strength assessment based on finite element analysis is applicable for the entire cargo hold region.

1.1.5 The analysis is to verify the following:
  • a) Stress levels are within the acceptance criteria for yielding.
  • b) Buckling capability of plates and stiffened panels are within the acceptance criteria for bucking defined in Ch 8.
  • c) Fatigue capacity of structural details is within the acceptance criteria defined in Ch 9.

1.1.6 A flow diagram showing the minimum requirement of finite element analysis is shown in Figure 1.

Parent topic: Section 1 Strength Assessment
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