《航空发动机薄壁机匣激光焊接有限元数值模拟》.pdfVIP

2006 7 July 2006 32 7 Journal of Beijing Univers ity of Aeronautics and Astronautics Vo.l 32 No7 汪 苏 王春侠 郭军刚 ( , 00083) (, 00076) : 针对航空发动机的关键部件之一 燃烧室薄壁机匣建立了 光焊接的数 值分析模型. 基于 SYSW ELD软件的焊接分析功能, 运用有限元分析方法研究了燃烧室薄壁机 匣环缝焊接时引起的焊接变形, 模拟了薄壁机匣 光焊接时的温度场应力场以及变形情况, 同时对焊接模拟中的热源问题从数学上进行了分析和探讨. 在此基础上结合整 个薄壁机匣的 实际工作状况对模拟结果进行了定性分析, 验证了分析方法的可行性, 为实际薄壁机匣焊接提 供了理论依据, 有助于薄壁机匣焊接工艺方法的改进. 该分析方法对焊接领域类似问题的处理 也有借鉴意义. : 有限元分析; 薄壁机匣; 光焊接; 温度场; 应力场; 变形 : TG 404 : A : 00 5965( 2006) Nume rica l smi u lation of lase r w e ld ing in com bustion cham be r case she ll on aeroeng ine W ang Su W ang Chunxia ( Schoo l ofM echanicalEng ineering andAutom ation, Beij ing University ofA eronautics and A stronautics, Beijing 00083, China) Guo Jungang ( China Academy ofLaunch Vehicle Technology, Beij ing 00076, China) Abstract: A numerical analysis modeling w as created about the case shell on aeroengine combustion chamber, w hich is one of the crucial parts of the aeroengine, during the process of laserw elding. W eld ing de formation due to circum ferentialw elds at the joint bewt een the two cylindrical shellsw as stud ied using the fi n ite element analysism ethod based SYSW ELD. Temperature field, w elded joint stress field and deform ation in laserw eld ing at case shell w ere smi u lated. Heat resource problems during w elding w ere analyzed and dis cussed from the point ofmathem atics, based onw hich the analysis resultw as qualitatively discussed combined w ith the factual co