摘要
针对小水线面双体船连接桥部位应力集中严重,疲劳强度问题突出现象.以某型小水线面双体船为例,通过全船有限元计算方法,确定了疲劳问题严重的连接桥结构部位,设计了实尺度疲劳试验模型.通过疲劳试验获得了典型载荷工况下的疲劳寿命值,采用极大似然法绘制S-N曲线.在此基础上对船体典型节点部位进行疲劳强度评估,并与规范校核结果进行比较.评估结果表明,采用试验所得S-N曲线计算时所得疲劳寿命较大.试验结果对小水线面双体船的结构设计具一定的借鉴意义.
The stress concentration of a small waterplane area twin hull（SWATH） ship＇s cross-deck structure is serious and the problem of its fatigue strength appears particularly obvious.Finite element analysis of the global structure of one SWATH ship was completed,and on this basis,the positions of cross-deck structures which have serious fatigue problems were determined.Then the full-scale fatigue test models were designed.Through fatigue tests,the values of the fatigue life were obtained under the typical load conditions,and then the S-N curves were drawn by the maximum likelihood method.On this basis,the fatigue strength assessment of the SWATH ship＇s structures was conducted on a typical nodal point,and the assessment was compared with the canonical check result.The assessment result shows that the fatigue life derived from the S-N curves is larger.The test result offers an important reference for the SWATH ship structure design.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第4期414-418,共5页
Journal of Harbin Engineering University
基金
国家自然科学基金资助项目(50809019)
