Abstract With the continuous development of nuclear power application, the structural design and verification of pressure-resistant cabin has become the key technology for nuclear-powered ships or nuclear-powered icebreakers. Through the design of reinforced pressure-resistant structure, the ultimate strength of the pressure-resistant cabin was investigated by experimental analysis and nonlinear finite element analysis. Moreover, the load-displacement curve of the cabin structure and the progressive failure mode were obtained through the numerical analysis of the full-scale model. Based on the similarity criterion, the corresponding scale models were designed and tested. Compared with the numerical results of the scale model, it is found that the failure mode in the tests are consistent with that in the numerical analysis. For the cabin structure of nuclear-powered ship, especially the prismatic pressure vessel, the corner is the key location for stress concentration. In order to comprehensively improve the bearing capacity and weight reduction of the cabin structure, the diagonally stiffened optimization model is proposed and further verified numerically.

中文翻译：

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核动力船舶压力舱极限承载力试验与数值研究

摘要 随着核电应用的不断发展，耐压舱室的结构设计和验证已成为核动力船舶或核动力破冰船的关键技术。通过加强耐压结构设计，通过试验分析和非线性有限元分析，研究了耐压舱的极限强度。此外，通过全尺寸模型的数值分析，获得了舱室结构的载荷-位移曲线和渐进破坏模式。基于相似性准则，设计并测试了相应的比例模型。与比例模型的数值结果进行对比，发现试验中的失效模式与数值分析中的一致。对于核动力船舶的舱室结构，特别是棱柱形压力容器，角部是应力集中的关键位置。为全面提高客舱结构的承载能力和减重能力，提出斜加筋优化模型并进一步进行数值验证。