基于二次抛物线插值的船体疲劳强度评估  

Fatigue Strength Assessment of Ship Structure Based on the Quadratic Parabola Interpolation

作　　者：陈宝松[1] 江晓俐[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063

出　　处：《船海工程》2011年第2期28-31,35,共5页Ship & Ocean Engineering

摘　　要：针对《船体结构疲劳强度指南》中使用三次拉格朗日插值法进行热点应力插值,因为插值节点数据不够平滑等因素导致插值效果不佳,甚至插值失败,提出用二次抛物线法替代三次拉格朗日法,避免插值失败。采用这一插值法在MSC.patran\nastran大型通用有限元软件中对某散货船槽形舱壁的典型结构节点进行热点应力疲劳强度评估,效果令人满意。Cubic Lagrange interpolation was stipulated in the CCS Guidelines for Fatigue Strength of Ships to estimate hot spot stress.However,the probability of failure is high due to unfaired data in interpolation nodes or other factors.The quadratic parabola interpolation was proposed to avoid or reduce failure of interpolation.The hot stress fatigue strength assessment of some typical structural spots located at a bulk carrier＇s corrugated bulkhead was carried out applying the proposed interpolation method.

关 键 词：疲劳强度评估 热点应力 二次抛物线插值 槽形舱壁 

分 类 号：U661.72[交通运输工程—船舶及航道工程]