Block Lifting Analysis to Examine the Cause of Cracking in the Hopper Top Plate

J. Ocean Eng. Technol. 2006;20(1):16-19.

KIM SANG-IL;

Ulsan Office, Lloyd's Register Asia;

블록 리프팅 시 Hopper Tank부 균열 발생 가능성 검토를 위한 구조해석

김상일;

로이드선급협회 아시아 울산지부;

Keywords: Block Lifting, Fractured Surface, Structural Strength, Equivalent Stress, Goliath Crane

핵심용어: 블록 리프팅, 파단면, 구조강도, 등가응력, 골리앗 크레인

Abstract

With the fast growth of the shipbuilding industry, the number of lifting lugs used every year has reached onehundred. This paper is aimed at examining the cause of cracking in the hopper top plate, due to block lifting. First of all, we have investigated the fracture surface in the occurrence position of the crack of the hopper top plate, using the scanning electron microscope. In this study, we have evaluated the structural strength for COT super block under present lifting conditions. For this purpose, the equivalent stresses have been calculated by linear elastic analysis, using the finite element program ABAQUS.