Local Ice-Load Estimation Based on Strain Response on the Bow Frame of ARAON Considering Draft Change

Beomsik Son; Sungrok Cho; Byungmo Kim

doi:10.7734/COSEIK.2026.39.5.335

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2026 Vol.39, Issue 5 Preview Page Next Page

Research Paper

Local Ice-Load Estimation Based on Strain Response on the Bow Frame of ARAON Considering Draft Change 흘수 변화를 고려한 아라온호의 선수부 늑골 변형률 응답 기반 국부 빙하중 추정

31 October 2026. pp. 335-343

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Abstract

This study proposes a frame-strain-response-based influence coefficient method to improve the local ice-load estimation for the icebreaking research vessel ARAON under varying draft conditions. A finite element model of the bow structure was developed to examine the strain distributions at candidate frame locations, measurement directions, and sensor positions. The analysis showed that the normal strain in the Z′ direction, measured below the second deck, provides a relatively sensitive and spatially stable response. To account for draft-dependent changes in the ice-load application, unit-pressure patch analyses were conducted for multiple draft conditions, and the resulting strain responses were approximated using a linear least-squares method. Based on these fitted responses, a draft-dependent influence coefficient matrix was constructed and used to estimate the discretized local ice pressures from the measured frame strains. The proposed method was evaluated under various combinations of draft and ice thickness and compared with a conventional side-shell-strain-based approach. The results indicate that the proposed frame-based method provides a more stable load estimation when the actual load position deviates from the predefined measurement region owing to draft variation, while requiring fewer strain gauges. However, additional improvements are required to reduce errors associated with variations in the ice thickness and to validate the method using full-scale measurement data.

Keywords

local ice-load estimation

IBRV ARAON

strain gauge

influence coefficient matrix

finite element method

본 연구는 쇄빙연구선 아라온호의 흘수 변화에 따른 국부 빙하중 추정을 위해 선수부 늑골 변형률 응답 기반 영향계수법을 제안하였다. 유한요소해석을 통해 늑골별 변형률 분포를 검토하고, Z′ 방향 및 제이갑판 하부 위치가 계측에 적합함을 확인하였다. 또 흘수별 압력 패치 해석 결과를 선형 최소제곱법으로 근사하여 흘수 의존 영향계수행렬을 구성하였다. 다양한 흘수와 해빙 두께 조건에서 기존 외판 응답 기반 방법과 비교한 결과, 제안 방법은 하중 위치가 계측 영역을 벗어나는 경우에도 상대적으로 안정적인 추정 성능을 보였으며, 기존 방법보다 적은 수의 스트레인게이지로 실선 계측에 적용 가능한 효율적 대안이 될 수 있음을 확인하였다. 다만 빙 두께 변화에 따른 오차 개선과 실측자료 기반 검증이 후속 과제로 요구된다.

키워드

국부 빙하중 추정

쇄빙연구선 아라온호

스트레인게이지

영향계수행렬

유한요소법

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 39
No :5
Pages :335-343
Received Date : 2026-06-29
Revised Date : 2026-06-30
Accepted Date : 2026-07-01
DOI :https://doi.org/10.7734/COSEIK.2026.39.5.335

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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