유조선 종강도부재의 확률론적 부식속도 예측모델의 개발

A Probabilistic Corrosion Rate Estimation Model for Longitudinal Strength Members of Tanker Structures

  • 백점기 (부산대학교 조선해양공학과) ;
  • 박영일 (부산대학교 조선해양공학과)
  • 발행 : 1998.05.01

초록

본 연구에서는 유조선 구조의 종강도부재를 대상으로 확률론적 부식예측모델을 개발하였다. 이를 위해 유조선 종강도부재의 부식계측자료를 수집하고, 구조 부위별로 통계분석을 통하여 부식속도(년간 부식량)의 평균치와 분산치를 계산하였다. 구조부재의 부식진행특성은 코팅방법이나 화물 적재방법에도 큰 영향을 받으며, 본 연구에서는 코팅방법에 따라 코팅수명이 달라진다는 점에 착안하여 부식속도특성에 대한 코팅수명의 영향을 분석하였다. 통계자료를 바탕으로 분석한 결과의 정도는 통계자료량에 의존하며, 본 연구에서는 추후 부식 계측자료가 더욱 축척되면 이들 자료의 추가 통계분석이 용이하도록 전용 해석프로그램을 개발하였다. 부식손상효과를 고려한 노후선박의 구조강도성능과 신뢰성을 평가하기 위하여는 선령의 증가에 따른 선체구조 주요부재의 부식속도를 예측할 수 있는 계산 모델이 필요하며, 본 연구에서 개발한 부식속도 예측모델은 그 같은 목적으로 유용하게 활용할 수 있으리라 기대된다.

The twin aims of the present study are to develop a PC program for the statistical analysis of the measured cohesion data and to suggest a probabilistic corrosion rate estimation model for longitudinal members of tanker structures. A data analysis for the corrosion rate statistics(i.e., mean, standard deviation) as a function of the corrosion parameters is established for various structural member categories/locations of interest. Development of the computer program is focused on possible operation together with future addition of more corrosion data as they become available. To investigate the influence of the corrosion protection scheme a series of the corrosion analysis varying the life of coating are carried out and several different corrosion models as a function of time are suggested depending on the coating life.

키워드

참고문헌

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