CAJ | 학술논문

针对含圆柱形非金属夹杂缺陷的金属构件脉冲放电问题，理论导出了圆柱绕流的电流密度分布，进而基于非傅立叶热传导方程求得升温阶段的温度场分布；采用有限元软件建立了含圆柱形非金属夹杂缺陷金属构件的二维有限元模型，从数值角度分析了温度场分布情况：沿通电方向夹杂两侧的温升几乎为零，垂直于通电方向夹杂两侧的温升最大，为2041.499℃。将理论计算与数值分析结果对比可知，两方法所得的温升比分布规律一致，最大温度误差和相对误差分别为17.486℃、3.485%。通过理论、数值两个方面分析验证了电磁热强化对含非金属夹杂缺陷的金属构件性能改善的有效性，为电磁热强化技术的应用奠定了基础。
침대함원주형비금속협잡결함적금속구건맥충방전문제，이론도출료원주요류적전류밀도분포，진이기우비부립협열전도방정구득승온계단적온도장분포；채용유한원연건건립료함원주형비금속협잡결함금속구건적이유유한원모형，종수치각도분석료온도장분포정황：연통전방향협잡량측적온승궤호위령，수직우통전방향협잡량측적온승최대，위2041.499℃。장이론계산여수치분석결과대비가지，량방법소득적온승비분포규률일치，최대온도오차화상대오차분별위17.486℃、3.485%。통과이론、수치량개방면분석험증료전자열강화대함비금속협잡결함적금속구건성능개선적유효성，위전자열강화기술적응용전정료기출。
A temperature field of the pulse current discharge in metal component with circular nonmetallic inclusion is studied in this paper. First, the current density distribution of flow around cylinder is derived. Second, the temperature distribution is obtained based on the non-Fourier heat transfer equation. Third, the two-dimensional finite element model is established using ANSYS. It is shown from studied results that the temperature rise on two sides of the inclusion along the current direction approaches zero, the temperature rise on two sides of the inclusion in the direction perpendicular to the current reaches the maximum temperature rise-2 041.499℃. With the same distribution law of temperature-rise in theoretical and numerical results, the maximal absolute error and maximal relative error is 17.486℃and 3.485%, respectively. The metal components with inclusion are studied based on the theory and numerical simulation. The research results provide the reference for further study of electromagnetic heating.