Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Guidance Information - Ship Vibration and Noise Guidance Notes - Chapter 5 Local structural vibration - Section 1 General

Section 1 General

1.1 Guidance values are based on Lloyd’s Register’s full scale experience of vibration induced structural cracking. The principal source of the data concerns the vibration of panels relative to their stiffened boundaries.

Structural fatigue is a complex failure mode and of necessity the guidance values have a broad stippled zone to cater for the wide variations encountered with regard to:

  • structural configurations and geometry
  • vibration mode
  • weld details
  • workmanship
  • environment.

It should be noted that the natural frequencies of tank panels are significantly influenced by the density and level of liquids within the tank. Damage may therefore only occur during particular cargo or operating conditions.

Parent topic: Chapter 5 Local structural vibration
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