Application of Advanced Composite Materials to Ship Structures -A Fundamental Study

船舶结构轻量化是高速船（如SES、水翼船）提高航速和经济性的关键技术。具有优异的强度与重量比的先进复合材料的应用对于改善性能是非常有希望的。碳纤维增强塑料（CFRP）在船舶结构中的应用，关键在于构件的包裹和成型成本的降低。本文采用BOTDR、FLDV、FIR、FBG等光纤传感系统，在CFRP结构模型中粘贴或嵌入光纤传感系统，对CFRP结构模型的制造过程进行监测，并对CFRP结构模型的制造过程进行分析，研究了CFRP结构模型在制造过程中的应力、应变、应变和应力的变化规律，以及CFRP结构模型在制造过程中的应力、应变和应变的变化规律。产品的质量评估和使用中的健康监测。研制了一种智能船舶结构，采用低温固化树脂体系真空成型法制作了大型CFRP构件，构件中安装了BOTDR、FTR、高速FBG和FLDV光纤传感器。实现了温度场、应变场、振动场、载荷历程和损伤检测的远程自动测量。利用该传感器系统制作了一个大型智能碳纤维复合材料结构，并进行了固化与形状监测、振动监测、应变监测和损伤检测。研究了智能结构和光纤结构健康监测系统在海洋结构中的应用。

Light weight of vessel structures is a key technology for velocity improvement and economical advantage of high speed ships, such as SES and hydrofoil. Application of advanced composite materials that have excellent strength vs. weight ratio is very promising for improvement of the performance. Enlargement of members and cost reduction of molding are important in order to apply the Carbon Fiber Reinforced Plastics (CFRP) to ship structures. An new advanced molding method and new materials systems should be applied to manufacturing of ship structure, and advanced inspection method should be developed for quality assessment during manufacturing and health monitoring in use.In the present research, fiber-optic sensing system, such as BOTDR, FLDV, FIR and FBG, were attached or embedded in the CFRP structure models, and process monitoring during manufacturing, quality assessment of the products and health monitoring in use are demonstrated. A smart ship structure was developed.Vacuum molding method for low-temperature curing resin system was applied for fabrication of large scale members made of CFRP, in which fiber optic sensors of BOTDR, FTR, high speed FBG and FLDV were mounted. Temperature distribution, strain distribution, vibration, load history and damage detection were automatically and remotely measure. A large smart CFRP structure with the developed sensor system was fabricated, and cure and shape monitoring, vibration monitoring, strain monitoring and damage detection. Applicability of smart structure and fiber-optic structural health monitoring system to maritime structure were investigated and discussed in the present research.