| 低周疲劳损伤对老化船舶结构剩余极限强度的影响 |
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| 引用本文： | 田雨,纪卓尚.低周疲劳损伤对老化船舶结构剩余极限强度的影响[J].中国造船,2010,51(1). |
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| 作者姓名： | 田雨 纪卓尚 |
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| 作者单位： | 大连理工大学船舶CAD工程中心,辽宁省,大连市,116024 |
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| 摘 要： | 为了分析低周疲劳累积损伤对老化船舶结构剩余极限强度的影响,应用连续介质损伤力学方法,将损伤耗散余势和塑性应变理论相结合,建立船舶结构剩余极限强度低周疲劳累积损伤模型,得到老化船舶结构极限强度随低周疲劳累积损伤衰减的规律.运用此模型,给出船舶常用Q235钢材和45钢材剩余极限强度随低周疲劳累积损伤衰减规律的工程应用经验关系式,验证了方法的合理性和实用性,为进一步分析低周疲劳对老化船舶结构极限强度的影响奠定了基础.
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| 关 键 词： | 船舶舰船工程 极限强度 剩余强度 低周疲劳 累积损伤 塑性应变 |
Effect of Low-cycle-fatigue Damage on Ultimate Strength of Aged Ships |
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| TIAN Yu,JI Zhuo-shang.Effect of Low-cycle-fatigue Damage on Ultimate Strength of Aged Ships[J].Shipbuilding of China,2010,51(1). |
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| Authors: | TIAN Yu JI Zhuo-shang |
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| Institution: | TIAN Yu,JI Zhuo-shang(Ship CAD Engineering Center,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | A low-cycle-fatigue(LCF) accumulative damage model is presented with dissipation of energy of continuum mechanics and condition of strain in order to analyze the effect of LCF damage on ultimate strength of aged ships.The proposed model is validated through the material data of Q235 steel and 45 steel,according to which the engineering empirical formulas are given.That establishes a foundation of further analysis of effect of LCF damage on ultimate strength of aged ship structures. |
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| Keywords: | ship engineering ultimate strength reserve strength low-cycle-fatigue accumulative damage elastic strain |
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