压力容器
壓力容器
압력용기
2013年
11期
42-46
,共5页
高压水射流喷丸%焊接残余应力%有限元%塑性变形
高壓水射流噴汍%銲接殘餘應力%有限元%塑性變形
고압수사류분환%한접잔여응력%유한원%소성변형
high pressure waterjet peening%weld residual stress%finite element%plastic deformation
焊接不可避免产生残余应力，对结构完整性造成很大影响。提出利用高压水射流喷丸技术降低焊接残余应力，并利用有限元法进行计算模拟。分别开发了模拟焊接的移动双椭球热源子程序及模拟高压水射流喷丸的移动压力载荷子程序，得到了经高压水射流喷丸处理前后焊接残余应力分布的变化规律。计算结果表明，经高压水射流喷丸处理后，焊缝和热影响区存在的焊态残余应力得到降低，在焊缝区已经产生压缩应力。证明高压水射流喷丸具有降低焊接残余应力的效果。
銲接不可避免產生殘餘應力，對結構完整性造成很大影響。提齣利用高壓水射流噴汍技術降低銲接殘餘應力，併利用有限元法進行計算模擬。分彆開髮瞭模擬銲接的移動雙橢毬熱源子程序及模擬高壓水射流噴汍的移動壓力載荷子程序，得到瞭經高壓水射流噴汍處理前後銲接殘餘應力分佈的變化規律。計算結果錶明，經高壓水射流噴汍處理後，銲縫和熱影響區存在的銲態殘餘應力得到降低，在銲縫區已經產生壓縮應力。證明高壓水射流噴汍具有降低銲接殘餘應力的效果。
한접불가피면산생잔여응력，대결구완정성조성흔대영향。제출이용고압수사류분환기술강저한접잔여응력，병이용유한원법진행계산모의。분별개발료모의한접적이동쌍타구열원자정서급모의고압수사류분환적이동압력재하자정서，득도료경고압수사류분환처리전후한접잔여응력분포적변화규률。계산결과표명，경고압수사류분환처리후，한봉화열영향구존재적한태잔여응력득도강저，재한봉구이경산생압축응력。증명고압수사류분환구유강저한접잔여응력적효과。
Residual stresses are generated inevitably during welding and have a great effect on structure integrity.High pressure waterjet peening is proposed to decrease the weld residual stress,which is simula-ted by finite element analysis.A moving double ellipsoid welding heat source and a moving pressure of high pressure waterjet peening subroutines were developed,and the residual stresses before and after the treatment of high pressure waterjet peening are obtained.The results show that due to the application of high pressure waterjet peening,the as-weld residual stresses in the weld metal and heat affected zone have been decreased greatly,even more some compressive stresses have been generated in the weld metal, proving that the high pressure waterjet peening could reduce weld residual stress.
