Abstract Fibre reinforced polymer (FRP) materials are recently widely applied in the marine industry. The high popularity of composites and safety requirements results in the development of Structural Health Monitoring (SHM) systems. One of the sensors types that can be permanently integrated with a composite structure and used as a part of SHM system are fibre Bragg grating (FBG) sensors. Among FBG sensors advantages small size, high corrosion resistance, and absence of electric current are especially important in monitoring of composite marine structures. The paper presents an application of embedded FBG sensors arrays for evaluation of complex composite structure — a fast patrol boat. The experimental investigations contain spectra analyses for thin laminate sample (skin), a composite sandwich panel and fast patrol boat hull (sandwich structure). The quality of sensors spectra (before/after embedding and loading) was determined using the Pearson correlation coefficient. The relationship between strain and temperature in exploitation range was determined for laminate and sandwich structures. A linear relationship was achieved for both elements. The relationship for the sandwich panel was then applied during strain analyses of the boat composite hull. The utility of designed FBG sensors array for the panel was also verified by sensors responses on impact excitation in chosen points on the structure. The achieved results were then used during designing FBG sensors array embedded into the hull. FBG sensors spectra deformations due to fast patrol boat hull manufacturing process and exploitation as well as strain curves determined for the boat during tests at dry dock and at sea trials are analysed.

中文翻译：

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嵌入式光纤布拉格光栅传感器在海洋应用复杂复合材料结构健康监测中的应用

摘要 纤维增强聚合物（FRP）材料近年来在船舶工业中得到广泛应用。复合材料的高度普及和安全要求导致了结构健康监测 (SHM) 系统的发展。可以与复合结构永久集成并用作 SHM 系统一部分的传感器类型之一是光纤布拉格光栅 (FBG) 传感器。在 FBG 传感器中，体积小、耐腐蚀和无电流等优点在复合海洋结构的监测中尤为重要。本文介绍了嵌入式 FBG 传感器阵列在评估复杂复合结构——快速巡逻艇中的应用。实验研究包含薄层压板样品（皮肤）的光谱分析，复合夹芯板和快速巡逻艇船体（夹层结构）。使用 Pearson 相关系数确定传感器光谱的质量（嵌入和加载之前/之后）。确定了层压板和夹层结构在开发范围内应变和温度之间的关系。两个元素都实现了线性关系。然后在船复合材料船体的应变分析期间应用夹层板的关系。为面板设计的 FBG 传感器阵列的效用也通过传感器对结构上选定点的冲击激发的响应得到验证。然后在设计嵌入船体的 FBG 传感器阵列时使用所获得的结果。