焊缝尺寸对焊接金属波纹管刚度的影响研究  

Study on the Effect of Weld Size on the Stiffness of Welded Metal Bellows

作　　者：冯震[1] 聂帅 田纪云 马世华 胡婷婷[1] FENG Zhen;NIE Shuai;TIAN Ji-yun;MA Shi-Hua;HU Ting-Ting(Beijing Aerospace Propulsion Institute,Beijing 100076,China)

机构地区：[1]北京航天动力研究所,北京100076

出　　处：《强度与环境》2022年第2期8-14,共7页Structure & Environment Engineering

摘　　要：基于焊接金属波纹管各切片金相图的焊缝尺寸测量数据和有效熔宽及熔深拟合数据,进行2D轴对称全模型绘制并使用有限元分析方法开展焊缝尺寸对焊接金属波纹管刚度的影响研究。研究发现焊缝尺寸和膜片之间的贴合干涉现象对焊接金属波纹管的刚度影响较大,焊缝尺寸越小则焊接金属波纹管整体刚度越大,压缩距离增大会导致膜片之间的贴合干涉现象加剧致使波纹管刚度增大。Based on the measurement data of weld size and morphology of each slice of welded metal bellows and the fitting relationship data between effective weld width and penetration depth,the 2D axsymmetric full model is drawn,and the influence of weld size on the overall stiffness of welded metal bellows is studied by finite element analysis method.It is found that the weld size and the bonding interference between the upper and lower diaphragms have a great impact on the stiffness of the welded metal bellows.The smaller the weld size,the greater the overall stiffness of the welded metal bellows.The increase of the compression distance will aggravate the bonding interference between the upper and lower diaphragms,resulting in the increase of the stiffness of the welded metal bellows.

关 键 词：金属波纹管 焊缝尺寸 压缩距离 刚度 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程]