| 基于断裂力学的散货船外底纵骨疲劳寿命评估 |
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| 引用本文： | 罗广恩,陈家旺,李良碧,王自力.基于断裂力学的散货船外底纵骨疲劳寿命评估[J].中国造船,2011(3). |
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| 作者姓名： | 罗广恩 陈家旺 李良碧 王自力 |
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| 作者单位： | 江苏科技大学船舶与海洋工程学院;中国船舶科学研究中心; |
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| 基金项目： | 船舶工业国防科技预研基金资助项目(08J1.3.3); 江苏科技大学江苏省船舶先进设计制造技术重点实验室开放研究基金资助课题(CJ0902); 江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 基于断裂力学的疲劳裂纹扩展理论,按《散货船共同结构规范》确定疲劳载荷及计算工况,通过有限元应力分析对某散货船外底纵骨与横舱壁或横框架连接节点处进行疲劳寿命分析,并探讨了裂纹形状比对疲劳寿命的影响。研究结果表明,外底纵骨上远离横舱壁或横框架一侧的软趾端处的疲劳寿命比靠近横舱壁或横框架一侧的通焊孔焊缝趾端处的疲劳寿命要短,并且疲劳寿命随着裂纹形状比的增大而增大。
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| 关 键 词： | 船舶、舰船工程 断裂力学 散货船 外底纵骨 疲劳寿命 |
Fatigue Assessment of Bottom Longitudinal of Bulk Carrier Based on Fracture Mechanics |
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| LUO Guangen,CHEN Jiawang,LI Liangbi,WANG Zili.Fatigue Assessment of Bottom Longitudinal of Bulk Carrier Based on Fracture Mechanics[J].Shipbuilding of China,2011(3). |
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| Authors: | LUO Guangen CHEN Jiawang LI Liangbi WANG Zili |
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| Institution: | LUO Guangen1,2,CHEN Jiawang1,LI Liangbi1,WANG Zili1(1.School of Naval architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China,2.China Ship Scientific Research Center,Wuxi Jiangsu 214082,China) |
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| Abstract: | In order to assess fatigue life reasonably,fatigue crack propagation theory based on fracture mechanics is applied to a bulk carrier in this paper.According to the standard Common Structural Rules for bulk carriers,fatigue loading and carrier loading conditions are decided.Fatigue life of the juncture of bottom longitudinal of bulk carrier and frame transition or transverse bulkhead is analyzed based on the result of FEM stress analysis,and the effect of the crack shape ratio on the fatigue life is investig... |
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| Keywords: | ship engineering fracture mechanics bulk carrier bottom longitudinal fatigue life |
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