摘要
把营运船舶的船体剖面模数看做受蚀耗影响的随机变量，基于随机变量函数线性化提出一个简单方法。该方法能够根据构件蚀耗率统计数据估算不同船龄船体剖面模数的平均值和标准差，并且能够根据定义的剖面模数极限值预测船体寿命期。计算了四条船蚀耗后剖面模数，数值结果表明蚀耗后剖面模数对其平均值离差很小。另外，试算了四条船的船体寿命期．
Hull section moduli of ships in service are treated as random variables due to corrosion and wear.A method based on linearization of a random function is described. By employing the corrosion and wear rate of longitudinal components, the method can be used to estimate the mean values and standard deviations of corroded and worn-hull section moduli, and to predict a hull lifetime according to a limit value of the moduli which may be inferred statistically from scrapped ships.The moduli of four ships at different ages are estimated. Numerical results show that dispersion of the moduli is small.A hull lifetime for each of the ships is predicted tentatively.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
1991年第3期317-323,共7页
Journal of Dalian University of Technology
关键词
船舶
船体强度
船舶寿命
船舶检验
hull strength
ship inspection
ship management/ estimation of ship lifetime
