船舶碰撞过程中带板梁结构剪切破坏机理初探

Primary investigation on shear failure mechanism of beam structure attached with band plates in the course of ship collision

以带板梁为研究对象,运用极限平衡理论和数值分析手段,讨论了剪切变形为主的带板梁变形和破坏机理。内容包括,极限载荷的计算方法;不同载荷作用下带板梁各横截面的合成应力、正应力、剪应力沿腹板高度的分布及其规律;塑性变形的产生和发展过程;带板梁碰撞吸能的成分分析。所得到的结果对耐撞性结构设计、建成船舶的耐撞性评估和模型试验方案设计等都具有指导意义。

Ultimate equilibrium theory and numerical analysis were used to discuss the deformation and damage mechanism of a beam structure attached with band plates mainly suffering from shear failure, including the method calculating extreme loading, the distribution regularity of combined stress, normal stress and shearing stress along web height at several cross-sections under different loadings, the generation and expansion of plastic deformation and the energy-absorbing composition analysis of the beam with band plates in the course of collision. The results can be referenced by crashworthiness structral design, assessment of crashworthiness for a finished vessel and conceptual design for model experiments.