大型LNG船玻璃钢压载水管道应力校核方法  

Stress Analysis Checking Method for GRP Ballast Water Pipeline of Large LNG Vessel

作　　者：杜晓程 DU Xiaocheng(China National Nuclear Power Co.,Ltd.,Shanghai 200233,China)

机构地区：[1]中国核能电力股份有限公司,上海200233

出　　处：《船舶工程》2021年第1期119-124,共6页Ship Engineering

摘　　要：玻璃钢管作为大型液化天然气(LNG)船压载水管道,在其应用过程中易出现部分管道破裂以及管道支架损坏的问题,针对该问题,以某大型LNG船为例,采用管道应力分析软件CAESARII建立压载水系统玻璃钢管道有限元模型。根据实际建造营运方式,考虑船舶运动加速度、船体变形、温度和压力等载荷,确定能覆盖所有建造运营条件的载荷工况。采用ISO 14692标准作为大型LNG船玻璃钢压载水管应力校核设计的标准,分析压载水管道的应力水平以及作用在管道支架上的负荷,对应力超标处的管道进行优化布置,对承受大负荷的管道支架进行结构加强设计。实船应用结果表明,该方法的应用效果良好,可推广到其他类型船舶的玻璃钢压载水管道系统的设计中。GRP pipes, as the ballast water pipeline of large LNG vessel, easily have problems such as part of pipe rupture and pipeline support damage in its application. Aiming at the problems, taken a certain large LNG vessel as an example, the GRP pipeline finite element model of the ballast water system is established by the pipeline stress analysis software CAESAR II. Based on the actual construction and operation mode, the loading condition which can cover all the construction and operation conditions is confirmed by considering the loads such as ship motion acceleration, hull deformation, temperature and pressure. The standard of ISO 14692 is adopted as the code for the stress checking design of GRP ballast water pipeline of large LNG vessel. The stress level of the ballast water pipeline and the loads on the pipeline supports are analyzed. The optimal arrangement is carried out for the pipelines, of which the stress exceeds the standard. The structural reinforcement design is done for the pipeline supports bearing large loads. The application result on the actual vessel shows that the method has good application effect and can be promoted to the design of the GRP ballast water pipeline system for other types of ships.

关 键 词：大型液化天然气船 压载水系统 玻璃钢管道 应力分析 

分 类 号：U664.84[交通运输工程—船舶及航道工程] TQ055.81[交通运输工程—船舶与海洋工程]