From the feature of the force and deformation of the tpih , 5 different elements are used to mesh the different zones of the tube , which are structural beam 3d elastic 4 , structural pipe plastic straight 20 , structural pipe elastic elbow 18 , structural shell elastic 4 node 63 and contact 3d pt - to - surf 49 ; the contact problem is assumed to be flexible - to - flexible ; the temperature field is assumed to be body load . a mechanical model corresponding to reality has been established for numerical simulation . based on the above , the 3 - d fem numerical simulation of tpih has been carried out by using the ansys program 針對加熱彎管過程的受力和變形特點,采用三維梁單元、三維塑性直管單元、三維彈性曲管單元、三維殼單元與三維點對面接觸單元等5種不同的單元分別對管毛坯不同區(qū)域進行劃分,并對接觸單元采用柔體-柔體的處理方法,將溫度場作為體載荷處理,建立了符合實際的加熱彎管問題數(shù)值模擬力學(xué)模型:在此基礎(chǔ)上,應(yīng)用商用軟件ansys對加熱彎管過程進行三維有限元模擬與研究,獲得了成形時推力、彎矩、支撐力大小及其變化趨勢。