砰击载荷作用下船体梁动态响应特性需要考虑船体钢质材料的动态本构关系、惯性效应和应力波效应等，其与静态破坏特性有着明显的差别。目前，船体梁静态极限强度已取得大量研究成果。动态极限强度作为评估船体梁在砰击载荷作用下安全性能的重要指标，对此展开研究的学者很少。因此，对砰击载荷作用下船体梁动态极限强度展开研究显得尤为重要。本文基于动力显示方法获得静态载荷作用下船体梁弯矩-转角曲线、静态极限强度(Mu)和静态极限转角(Ry0)，将静态极限转角作为评估砰击动载荷作用下船体梁动态极限强度的基准，讨论了砰击载荷持续时间、砰击冲量和砰击载荷幅值对船体梁动态响应特性的影响。
The dynamic response characteristics of hull girder under slamming load need to consider the dynamic constitutive relationship, inertia effect and stress wave effect of the hull steel material, which is obviously different from the static failure characteristics. At present, a large number of research results have been obtained for the static ultimate strength of hull girder. The dynamic ultimate strength is an important index for evaluating the safety performance of hull girder under slamming load, and few scholars have conducted research on this. Therefore, it is particularly important to study the dynamic ultimate strength of hull girder under slamming load. In this paper, the hull girder bending moment-rotation curve, static ultimate strength (Mu) and static limit rotation angle (Ry0) are obtained under static load based on the dynamic display method. The static limit angle of rotation is used as the basis for evaluating the dynamic ultimate strength of hull girder under slamming dynamic load. The effects of slamming load duration, slamming impulse and slamming load amplitude on the dynamic response characteristics of hull girder are discussed.
2022,44(8): 24-29 收稿日期：2021-09-03
DOI：10.3404/j.issn.1672-7649.2022.08.005
分类号：U661.43
作者简介：夏劲松(1991-),男,工程师,研究方向为船舶与海洋结构物设计制造
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