摘要
以船舶碰撞与搁浅中强肋框构件为研究对象,用塑性力学解析理论研究强肋框构件承受面内载荷时的结构变形机理,并据板材面内受压变形时的新特点,提出新的强肋框板面内受压变形模式。在此基础上运用塑性力学理论推导出结构变形能、瞬时结构变形阻力及平均结构变形阻力的解析计算公式。利用已有试验结果对该解析计算方法进行验证。结果表明,该方法准确度高、解析计算方便,适用于船体抗撞性结构设计及船舶碰撞与搁浅事故风险快速评估。
The structural deformation mechanism of web girders subjected to in-plane load during ship collision and grounding accidents were investigated with the analytical plastic theory and some new features during deformation process were found. A new deformation model for ship web girders subjected to in-plane force was proposed in accordance with the new features. Based on the new model, the analytical formulae for energy dissipation, instantaneous force and mean resistance of web girders were obtained in the light of the plastic analysis. Finally, the new analytical method was verified by the results of two previous model tests. The results of the new analytical method match well with those of the model tests. Benefiting from its good accuracy and simplicity, the new analytical method can be a useful tool in the preliminary structural design for ship crashworthiness and also in the quick assessment of risk during ship collision and grounding accidents.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第8期55-60,共6页
Journal of Vibration and Shock
基金
国家自然科学基金重点项目(51239007)
关键词
船舶碰撞和搁浅
强肋框
变形机理
解析计算
试验验证
ship collision and grounding
web girders
deformation mechanism
analytical method
model test veri-fication
