玻璃纤维增强柔性冷水管截面设计及强度分析

Section design and strength analysis of glass fiber reinforced flexible cold-water pipe

海洋温差能因具有能源稳定、环保可持续等特点,而具有较高的开发利用价值.冷海水管设计是温差能电站建造的重要环节,为降低成本,提出一种分段设计方法.首先,利用ABAQUS软件对直径为1 m的大口径玻璃纤维增强柔性冷水管进行截面设计,并运用ORCAFLEX软件分析缓波形布置冷水管的整体受力情况;其次,根据整体受力分析结果将冷水管按深度分段,再通过ABAQUS软件建立局部分析模型,计算得到不同分段冷水管满足内压、外压、拉伸载荷及弯矩组合载荷强度要求的增强层最少纤维缠绕层数;最后,提出分段设计截面的方法.研究结果表明,采用分段设计截面的方法,可大幅减少冷水管纤维增强层材料的用量,降低冷水管的制作成本,为大口径玻璃纤维增强冷水管的设计提供参考.

Ocean thermal energy conversion(OTEC)is stable,environmentally friendly and sustain-able,and has good development and utilization value.The design of cold-water pipes is an important part of OTEC power plant construction.In order to reduce the cost,ABAQUS software is used to design the section of a large-diameter glass fiber reinforced flexible cold-water pipe with a diameter of 1 m.The ORCAFLEX software is used to analyze the overall stress of the cold-water pipe with slow wave layout,and the cold-water pipe is segmented by depth according to the overall force analysis results.The local analysis model is established by ABAQUS software to calculate the minimum number of fiber winding layers of the reinforced cold-water pipe to meet the combined load strength requirements of internal pressure,external pressure,tensile load and bending moment.Finally,a method of section design is proposed.The results show that the method of segmented cross-section design can greatly reduce the amount of fiber reinforced layer material and reduce the production cost of cold-water pipe.It provides a reference for the design of large-diameter glass fiber reinforced cold-water pipe,