浮动核电站双层舷侧结构与球鼻艏碰撞计算分析

Collision analysis of floating nuclear power plant's side structure collided by bulb bow

浮动核电站在运行过程中的安全性是其设计阶段需要着重考虑的问题,这其中就包括舷侧结构在发生船舶碰撞时的耐撞性能。参考20 000 t浮动核电站的结构形式,介绍了利用LS-DYNA对传统双层舷侧结构与刚性球鼻艏发生的微能碰撞所进行的有限元分析。参考舷侧结构简化模型的有关计算公式,提出了一种舷侧结构组合模型用于简化解析法的计算。通过计算得到了舷侧结构变形能随撞击深度变化的关系曲线,并将其与有限元分析所得结果进行了比较,得到了较好的拟合,验证了该方法的合理性及其实际应用价值。

The operational safety of the nuclear power plant is a critical issue to be considered in the design stage, which includes the crashworthiness of the side structure in ship collision. Referring to the structure of 20 kilotons floating nuclear power plant, this paper firstly introduced the finite element analysis carried out on the minor colli-sion of the traditional double-deck side structure and the rigid bulb bow by using LS-DYNA, then, referring to the relevant calculation formulas on the simplified model of side structure, presented a combined side structure model for the calculation of the simplified analytic method. After calculating by this method, the relationship curve that the deformation energy of side structure varies following the collision depth was attained. After comparing the calculation result with the finite element analysis result, a good fitting agreement was obtained and the rationality as well as the practical application value of this method was confirmed.