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外部流场对激光加热运动目标影响的数值模拟
Numerical simulation of airflow effect on moving body under laser irradiation
查看参考文献13篇
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文摘
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考虑激光与运动目标相互作用的基础上。利用有限元方法分析了亚声速条件下运动目标在激光辐照全过程的温度场和热应力场的分布与演化规律。结果表明：高速流场的存在，导致了明显的冷却效应；加热过程中目标材料出现了屈服，导致激光熄灭后结构内出现残余应力和变形；激光辐照区边缘产生很高的温度梯度和应力梯度，并且由于气流影响，受辐照区域前后两端应力分布不对称。 |
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其他语种文摘
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The flow field outside a moving object with high velocity has much influence on the object＇s temperature and stress distribution under laser irradiation. The thermo-fluid-mechanical coupling of a moving cylinder with a subsonic velocity is considered, and the temperature and stress field are obtained using finite element method. It is found that there is a high temperature gradient at the region of the heat source. The stress of the material reaches the yielding limit quickly due to the high temperature, and high residual stresses occur in the material. At the inner surface of the cylinder the stress component is compressive at first, and then becomes tensile gradually due to the temperature rise outside the cylinder. Because of the airflow pressure the stress distribution was not symmetry after the heating process, the stress component of the head of the structure is compressive while it becomes tensile at the tail. |
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来源
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强激光与粒子束
,2007,19(11):1817-1821 【核心库】
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关键词
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温度场
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热应力
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热流固耦合
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流场
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MFS方法
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地址
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中国科学院力学研究所, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4322 |
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学科
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电子技术、通信技术 |
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基金
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国家863计划
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文献收藏号
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CSCD:3043318
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