摘要
船舶碰撞事故是海上交通领域的重大安全隐患,因此发展针对结构碰撞损伤的工程化快速预报方法具有重要的现实意义。该研究聚焦楔形船艏斜向碰撞场景下被撞船舷侧外板板架结构承载破裂后的撕裂损伤模式,建立板材与骨材的简化模型并开展理论推导,通过考虑斜撞场景下板材的非对称撕裂卷曲以及骨材与板材的相互作用,建立了针对该场景下撕裂损伤抗力的解析预报模型。随后,通过结合现有研究成果中其他构件不同失效模式的解析/半经验预报模型,对斜撞场景下舷侧完整结构抗力与能量吸收进行了预报,并开展有限元数值仿真,利用数值结果对解析预报模型进行验证。结果显示:所提解析预报方法能针对复杂斜撞场景给出高效、合理的预报,与数值仿真计算结果的能量耗散相对误差平均值控制在20%以内,尤其是在损伤严重的4 m大撞深场景下,相对误差可控制在10%以内;该研究成果填补了斜撞场景下外板板架结构撕裂损伤预报的空白,由于其快速性与准确性,对于结构抗撞性能的优化设计具有重要的工程应用价值。
Ship collision accidents represent a major safety hazard in maritime transportation,highlighting the critical need for rapid engineering prediction methods to assess structural collision damage.This study focuses on the tearing damage mode of side shell structures under oblique impacts by wedge shaped bows.Simplified models for plates and stiffeners were established,and theoretical derivations were conducted.By considering the asymmetric tearing and curling of plates and the interaction between stiffeners and plates in oblique collision scenarios,an analytical prediction model for tearing damage resistance was developed.Based on existing research,analytical and semi-empirical models for different failure modes of structural components were integrated to predict the overall resistance and energy absorption of the side structure under oblique impacts.Finite element simulations were performed to validate the analytical model.Results demonstrate that the proposed method provides efficient and reasonable predictions for complex oblique collision scenarios.Compared with numerical simulations,the average relative error in energy dissipation is maintained below 20%,decreasing to under 10%for 4 m large-penetration scenarios.This research fills the gap in predicting tearing damage of side shell structures under oblique impacts.Due to its speed and accuracy,the findings offer significant engineering value for optimizing structural crashworthiness design.
作者
杜梦波
张一弛
袁昱超
唐文勇
DU Mengbo;ZHANG Yichi;YUAN Yuchao;TANG Wenyong(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《振动与冲击》
北大核心
2025年第24期40-51,共12页
Journal of Vibration and Shock
基金
上海市浦江人才计划资助(23PJ1406900)
中国博士后科学基金特别资助(2024T170548)。
关键词
船舶斜撞
撕裂损伤
简化解析方法
损伤预报
ship oblique collision
tearing damage
simplified analytical methods
damage prediction
