| 海冰弯曲破坏下的破坏准则数值模拟方法研究 |
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| 引用本文： | 黄焱,袁光奇,马健钧.海冰弯曲破坏下的破坏准则数值模拟方法研究[J].数学的实践与认识,2014(23). |
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| 作者姓名： | 黄焱 袁光奇 马健钧 |
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| 作者单位： | 天津大学水利工程仿真与安全国家重点实验室;天津大学建筑工程学院; |
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| 基金项目： | 国家自然科学基金(51179123,51279131);国家自然科学基金创新研究群体科学基金(51021004) |
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| 摘 要： | 海冰的弯曲破坏进程的研究已经称为冰工程界的一项重要课题.通过理论分析结合数值计算对海冰弯曲破坏数值模拟方法进行探索:探讨适合于海冰弯曲应力状态下的本构模型和破坏准则;在LS-DYNA中模拟圆环形冰排弯曲破坏和冰排与锥体结构相互作用的进程,提出了一种对海冰破坏准则验证的技术思路;通过所提出的技术思路对基于三轴压缩试验的Derradji破坏准则进行了修正,使其能够适用于海冰的弯曲破坏.
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| 关 键 词： | 海冰 弯曲破坏 破坏准则 数值模拟 |
Methodology Research on the Numerical Simulation of the Bending Failure of Sea Ice |
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| Abstract: | The research on ice bending failure has become a significant subject in the ice engineering.In this paper,the numerical method and theory analysis are combined to seek an efficient method for simulating the ice bending failure process.Discuss the existing constitutive model and failure criterion of sea ice that fit the sea ice in bending stress condition.By using the LS-DYNA code to simulate a ring ice sheet bending failure and ice-cone interaction,propose a general tactical method to modify sea ice bending failure criterion.Use the tactical method proposed above to modify Derradji's failure criterion which is based on the triaxial compression tests in order to make the failure criterion fits the ice bending failure process. |
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| Keywords: | sea ice bending failure failure criterion numerical simulation |
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