Dynamic responses of steel plates under repeated ice impacts

被引：34

作者：

Cai, Wei ^{[1
,2
,3
]}

Zhu, Ling ^{[1
,2
]}

Qian, Xudong ^{[3
]}

机构：

[1] Wuhan Univ Technol, Key Lab High Performance Ship Technol, Minist Educ, Wuhan 430063, Peoples R China

[2] Wuhan Univ Technol, Sch Naval Architecture Ocean & Energy Power Engn, Wuhan 430063, Peoples R China

[3] Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore

来源：

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING | 2022年 / 162卷

基金：

中国国家自然科学基金;

关键词：

Steel plates; Repeated ice impacts; Plastic deformation; Energy absorption; Pseudo-shakedown; PSEUDO-SHAKEDOWN; MATERIAL MODEL; BEAMS;

D O I：

10.1016/j.ijimpeng.2021.104129

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The repeated ice floe impact events on polar ships and offshore structures are very common in ice region. The accumulated plastic deformation of structures under repeated ice impact loadings reflects directly the damage conditions in the structures and is thus an important and convenient parameter in engineering assessment. The aim of this paper is to study the dynamic responses of steel plates subjected to repeated ice impacts based on the experimental and numerical methods. The laboratory repeated impact tests between the steel plates and fresh water ice wedges were carried out by using horizontal impact test machine. For each ice impact test, the collision forces and plastic deformations of steel plates were investigated. Besides, the finite element simulations are conducted to estimate the accumulated plastic deformations of steel plates under repeated ice impacts, which show good agreement with experimental results. Moreover, the energy dissipation of ice and the energy absorption of plate in each ice impact are studied based on numerical results, and the energy criterion of pseudo shakedown phenomenon has been re-examined for steel plate under identical repeated ice impacts. This paper analyses the plastic deformation accumulation and energy-sharing mechanisms of steel plates subjected to repeated ice impact loadings, which can provide useful information for the evaluation of the structural safety of ice-classed ships.

引用

页数：16