Section 8 Environmental loads for site-specific load scenarios
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 10 Ship Units - Chapter 2 Loads and Load Combinations - Section 8 Environmental loads for site-specific load scenarios

Section 8 Environmental loads for site-specific load scenarios

Parent topic: Chapter 2 Loads and Load Combinations

8.1 Site-specific dynamic load combination factors

8.1.1  Application.
  1. Site-specific dynamic load combination factors (DLCFs) are to be derived from the environmental loads for the proposed area of operation. The simultaneously acting dynamic load cases are to be applied using the site-specific DLCFs.
  2. The operating area notation will be assigned consistent with the geographic area used for the site-specific assessment.
  3. The assessment of environmental loads is to consider Pt 10, Ch 1, 5.1 General 5.1.3 for new-build units and Pt 10, Ch 1, 6.1 General 6.1.3 for tanker conversions. See also Pt 4, Ch 3, 4.1 General.
  4. Alternative methods of establishing the environmental loads will be specially considered, provided that they are based on hindcast data, long-term measurements, global and local environmental theoretical models, or similar techniques. In such cases, full details of the methods used are to be provided when plans are submitted for approval.
  5. In order that an assessment of the design requirements can be made, the following information is to be submitted:
    1. Service area notation required together with the required extent of the operational area.
    2. The wave environmental parameters for the design.
    3. Specification of the environmental conditions used for the design assessment.
  6. Dynamic Load Combination Factor (DLCF) Tables are specified in Pt 10, Ch 4 Dynamic Load Combination Factors for the geographic locations shown in Table 2.3.2 Environmental factors in Pt 10, Ch 2 Loads and Load Combinations. These Tables may be used for the initial design of units operating at these locations. The Tables may be used for on-site operation and inspection/maintenance load scenarios. The deep draught DLCF Table for the operational condition may be used for the initial design of units for the flooded case.

    The DLCF Tables are dependent on the longitudinal position being considered. The Tables given in Pt 10, Ch 4 Dynamic Load Combination Factors have been derived for the longitudinal positions specified in Figure 2.7.1 Illustration of structural regions for DLCF Tables, for light load and deep load draughts.

    The DLCF Tables for a novel design that differs significantly from the hull configuration covered by Table 3.1.2 Shear force distribution factors shall be derived by direct calculation in accordance with the LR ShipRight Procedure for Ship Units.

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