考虑腐蚀减薄的球壳开孔结构随机有限元分析  

Stochastic finite element analysis for spherical shell with round hole in thinned conditions from corrosion

作　　者：邱昌贤[1] 万正权[1] 黄进浩[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2013年第11期1269-1277,共9页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(10972204)

摘　　要：文章将Monte Carlo抽样法和有限元非线性屈曲计算相结合,利用参数化方法模拟了满足Gumble分布和Gauss分布的钢板腐蚀减薄量在超大潜深球壳开孔结构上的分布,对各状况进行了100个样本的计算,并分析了腐蚀量均值和方差对结构在静水外压下极限承载能力的影响,结果表明,腐蚀样本数据分散度的大小几乎不产生影响,产生主要影响的是样本均值,失稳压力随腐蚀减薄量均值的增大而显著地线性降低。Based on the Monte Carlo sampling theory and FEM nonlinear buckling analysis, APDL program was developed to simulate Gumble ＆ Gauss distributions of corrosionthinned status of superdiving spheri cal hull with round hole structure. The calculation of 100 samples was accomplished for each different con ditions. The influence of sample mean and variance on the collapse pressure of model under external hy drostatic pressure was also analyzed. Results show that sample variance has little effect on the critical pres sure, which is mainly determined by corrosion sample mean, and collapse pressure declines evidently and linearly with increment of the mean value of corrosion thinned data.

关 键 词：球壳 开孔 腐蚀 随机有限元 MONTE Cado 

分 类 号：U674.76[交通运输工程—船舶及航道工程]