李岩,刘琪,李艳彪,张艳峰,田孟良,吴志生

• 1:山西师范大学现代文理学院转设筹备处
• 2:太原科技大学材料科学与工程学院
• 3:北京航空航天大学机械工程及自动化学院
• 4:中国航发贵州黎阳航空动力有限公司技术中心

摘要(Abstract)：

以壁厚为1 mm的高温合金尾喷管为研究对象，基于热-弹-塑性有限元法与固有应变法，研究外部约束对薄壁高温合金尾喷管工件焊接变形的影响。通过焊接工艺试验和热-弹-塑性有限元法仿真，进行焊接热源校核，获得对接接头的固有应变和材料模型参数。建立全尺寸三维尾喷管焊接有限元模型，基于固有应变理论的弹性有限元方法，利用平板对接获得的材料模型参数，计算不同外部约束对尾喷管工件焊接变形的影响。结果表明：进气口约束对控制尾喷管焊后变形起主要作用，在进气口施加约束时，工件变形最小，为2.39 mm,变形发生在尾喷管内环与外环弧形焊缝位置。通过尾喷管组件产品焊后变形测量与仿真结果对照，验证了仿真计算方法的准确性，固有应变法可适用于薄壁尾喷管焊接变形预测。

关键词(KeyWords)： 外部约束;高温合金;尾喷管;焊接变形;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 山西省基础研究计划(202203021221149);; 国家重点研发计划(2018YFA0707305);; 山西省科技重大专项(202101120401008);; 山西省重点研发计划(202102050201001);; 临汾市重点研发计划(2202);; 山西省高等学校科技创新项目(2022L628)

作者(Author): 李岩,刘琪,李艳彪,张艳峰,田孟良,吴志生

DOI: 10.13289/j.issn.1009-6264.2023-0087

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