Author(s)

Franck L. M. Violette

Abstract

To provide plan approval surveyors, and ship designers with a design tool to assess the fatigue performance of ship structural details, Lloyd's Register (LR) has developed a multi-level fatigue design assessment. The ongoing research project has been supported by extensive analytical and numerical studies, experimental fatigue testing of large ship structural models, and in-service fatigue monitoring. In this paper, a brief overview of the components of the multi-level fatigue design assessment system is given, followed by a more detailed description of the procedural aspects of the level 3 spectral fatigue direct calculation. 1. Introduction

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