压力容器
壓力容器
압력용기
2015年
8期
26-34
,共9页
X80 管线钢%螺旋管%焊接残余应力%子程序法%热振幅曲线法
X80 管線鋼%螺鏇管%銲接殘餘應力%子程序法%熱振幅麯線法
X80 관선강%라선관%한접잔여응력%자정서법%열진폭곡선법
X80 steel%spiral pipe%welding residual stress%subroutine method%thermal load amplitude curve method
基于 ABAQUS 有限元分析软件对三维螺旋管模型进行了残余应力的模拟。运用 FORTRAN语言编写 DFLUX 子程序控制热源的移动路径、速度以及幅值，得到了焊接过程中的温度场及残余应力场，且焊接残余应力场的分布趋势得到了试验验证。结果表明，随着热源的移动，温度场和应力场呈现出关于焊缝对称的不均匀分布；应力值在熔合区表现出最大拉应力。同时，探讨了热振幅曲线法对焊接残余应力模拟结果的准确性。通过与子程序法对比，发现热振幅曲线法可以较为准确地预测焊接残余应力的分布，为大型复杂结构焊接残余应力的模拟提供了一种高效的方法。
基于 ABAQUS 有限元分析軟件對三維螺鏇管模型進行瞭殘餘應力的模擬。運用 FORTRAN語言編寫 DFLUX 子程序控製熱源的移動路徑、速度以及幅值，得到瞭銲接過程中的溫度場及殘餘應力場，且銲接殘餘應力場的分佈趨勢得到瞭試驗驗證。結果錶明，隨著熱源的移動，溫度場和應力場呈現齣關于銲縫對稱的不均勻分佈；應力值在鎔閤區錶現齣最大拉應力。同時，探討瞭熱振幅麯線法對銲接殘餘應力模擬結果的準確性。通過與子程序法對比，髮現熱振幅麯線法可以較為準確地預測銲接殘餘應力的分佈，為大型複雜結構銲接殘餘應力的模擬提供瞭一種高效的方法。
기우 ABAQUS 유한원분석연건대삼유라선관모형진행료잔여응력적모의。운용 FORTRAN어언편사 DFLUX 자정서공제열원적이동로경、속도이급폭치，득도료한접과정중적온도장급잔여응력장，차한접잔여응력장적분포추세득도료시험험증。결과표명，수착열원적이동，온도장화응력장정현출관우한봉대칭적불균균분포；응력치재용합구표현출최대랍응력。동시，탐토료열진폭곡선법대한접잔여응력모의결과적준학성。통과여자정서법대비，발현열진폭곡선법가이교위준학지예측한접잔여응력적분포，위대형복잡결구한접잔여응력적모의제공료일충고효적방법。
The welding residual stress of spiral pipe was simulated using the ABAQUS commercial soft-ware.The subroutine compiled by FORTRAN language was adopted to control the welding path,velocity and magnitude of heat source.The distributions of spiral pipe′s temperature field and welding residual stresses were obtained.The results show that with the move of the heat source,the distribution of the tem-perature and the residual field is symmetrical with respect to the welding seam but not uniform.Mean-while,it is found that the maximum tensile residual stress is located at the fusion zone.Besides,the accu-racy and feasibility of the thermal load amplitude curve method was discussed.Compared with the results obtained by calling the subroutine,it is known that thermal load amplitude curve method can also accu-rately predict the welding residual stress,providing an efficient method to calculate the welding residual stress of a complex structure.
