Abstract The use of flexible ship models to determine the dynamic behaviour of full-scale ships in waves and to compare the accuracy of numerical predictions has increased in the past few years. Segments attached to a flexible uniform backbone of suitable but simple cross section is the preferred solution. Although such models are relatively easy to manufacture with conventional processes, they do not represent accurately the structural detail, for example, of a container ship. The limitations of conventional manufacturing constraints can be potentially overcome by use of modern technologies such as additive manufacturing. Designing detailed elastic ship models requires the determination of dynamic material properties, in addition to the manufacturer mechanical properties. In this investigation, a detailed but easy-to-implement method is developed, and applied to a uniform container ship-like model, to identify the material properties that are relevant to the calculation of the natural frequencies of 3D printed thin-walled structures. It is demonstrated that modal testing of 3D printed specimens, combined with FEAmodelling, can be used to accurately predict the natural frequencies of much more complex thin-walled structures. This method allows investigators to acquire all information necessary during the design stage of 3D printed structures without having to resort to full material characterisation.

中文翻译：

---

使用增材制造生产的具有真实结构配置的船舶模型的振动特性预测

摘要 在过去几年中，使用灵活的船舶模型来确定全尺寸船舶在波浪中的动态行为并比较数值预测的准确性有所增加。连接到具有合适但简单横截面的柔性均匀主干上的节段是优选的解决方案。尽管使用传统工艺制造此类模型相对容易，但它们并不能准确表示结构细节，例如集装箱船的结构细节。通过使用增材制造等现代技术，可以潜在地克服传统制造限制的局限性。除了制造商的机械性能外，设计详细的弹性船舶模型还需要确定动态材料属性。在这项调查中，开发了一种详细但易于实施的方法，并应用于统一的集装箱船型模型，以确定与 3D 打印薄壁结构的固有频率计算相关的材料特性。结果表明，3D 打印样本的模态测试与 FEA 建模相结合，可用于准确预测更复杂的薄壁结构的固有频率。这种方法允许研究人员在 3D 打印结构的设计阶段获取所有必要的信息，而不必求助于完整的材料表征。可用于准确预测更复杂的薄壁结构的固有频率。这种方法允许研究人员在 3D 打印结构的设计阶段获取所有必要的信息，而不必求助于完整的材料表征。可用于准确预测更复杂的薄壁结构的固有频率。这种方法允许研究人员在 3D 打印结构的设计阶段获取所有必要的信息，而不必求助于完整的材料表征。