CAJ | 학술논문

利用大型通用有限元分析软件ABAQUS，建立了螺旋焊管双丝埋弧焊温度场的有限元计算模型。通过ABAQUS软件的FORTRAN语言编写焊接子程序DFLUX，结合“生死”单元技术，模拟了螺旋焊管双丝埋弧焊的内外焊接过程，实现在移动热源载荷下的有限元计算，获得了焊接过程和冷却后的温度场分布，以及在整个管体上的分布情况。结果表明，在焊接过程中焊缝附近温度梯度很大，在远离焊缝的地方温度梯度渐渐趋于平缓；随着热源的移动，温度中心也随之移动，最高温度可达母材的熔点。通过试验验证，与仿真结果比较吻合。
이용대형통용유한원분석연건ABAQUS，건립료라선한관쌍사매호한온도장적유한원계산모형。통과ABAQUS연건적FORTRAN어언편사한접자정서DFLUX，결합“생사”단원기술，모의료라선한관쌍사매호한적내외한접과정，실현재이동열원재하하적유한원계산，획득료한접과정화냉각후적온도장분포，이급재정개관체상적분포정황。결과표명，재한접과정중한봉부근온도제도흔대，재원리한봉적지방온도제도점점추우평완；수착열원적이동，온도중심야수지이동，최고온도가체모재적용점。통과시험험증，여방진결과비교문합。
By using large-scale general finite element analysis software ABAQUS, the finite element calculation model of spiral welded pipe two-wire submerged arc welding temperature field was built. The inside and outside welding process of spiral welded pipe two-wire submerged arc welding was simulated based on welding subroutine DFLUX which was compiled by FORTRAN language, combined with the element of birth and death technology in three-dimensional finite element method. It also realized finite element calculation under moving heat source load, and obtained temperature fields distribution in welding process, after cooling down, and in the full pipe body. The results indicated that during welding process, the temperature gradient near weld is large;it is tend to smooth transition far away from the weld. With welding heat source moving, the temperature center also move, the highest temperature can reach the melting point of base metal. Through the experiment, it is consistent with simulation results.