Analysis of Offshore Tubulars Subjected to Collision Impacts Using a Spring-Beam Model

J. Ocean Eng. Technol. 1995;9(1):22-35.

스프링-보 모형을 이용한 해양구조물 원통부재의 충돌 해석

조상래,권종식

울산대학교 조선및해양공학과,한라중공업 선박해양연구소

Keywords: Collision Impact, Offshore Tubular, Spring-Beam Model

Abstract

A simplified numerical procedure have proposed to trace the dynamic behaviour of offshore tubulars subjected to lateral collision impacts. The local denting and overall bending deformation of the struck tubular are represented by a non-linear spring and an elastic visco-plastic beam respectively. In this method a temporal finite difference method and a spacial finite element method are employed. Using this method various boundary conditions are able to considered and their effects on the extent of damage can be quantified. The extent of damage due to collision can be obtained as results of the dynamic analysis. The predictions using the proposed method have been correlated with existing test results and then the reliability of the procedure has been substantiated. The characteristics of the dynamic response of tubulars under lateral impacts are compared for simply supported roller and fixed end conditions and their effects on the extent of damage are specfied.