海军航空大学学报2024，Vol.39Issue(1)：139-146,8.DOI:10.7682/j.issn.2097-1427.2024.01.006
浮空器管材结构连接方式比较及拉伸强度分析
Comparison and Tensile Strength Analysis of Connection Modes of Aerostat Pipe Structure
摘要
Abstract
The structural components of aerostat,such as pods,transition,propulsion support,etc,are mostly connected by metal pipes.The connection of aerostat pipe structure lacks actual measured data of limit values under operating condi-tions,and there is not enough theoretical support in the selection of materials and connection modes at present.Different connection modes of common pipes should be compared and analyzed for fracture.The aluminum alloy and titanium al-loy pipes are connected by screw and welding modes,respectively.Their physical properties are tested and simulated anal-ysis is performed to verify the reason of fracture.The results show that compared with the screw connection,the welding mode improves the connection strength by 87.9％for TA1 titanium pipes.Compared with the welding mode,the screw connection improves the connection strength by 39.3％for 6061 aluminum alloy pipes.The welding connection strength of 2A12 aluminum alloy pipes is better than their screw connection strength.Meanwhile,it is found that the pipe deforma-tion is a critical factor affecting the connection strength of welding pipe.Stress concentration is easy to occur at the joint of pipe ends,leading to cracks in the welding line of the ends.The pipe deformation results in tearing phenomenon when the base material is fractured,and further lowers the maximum connection strength of pipes.关键词
浮空器/工程应用/2A12铝合金/6061铝合金/TA1钛合金Key words
aerostat/engineering application/2A12 aluminum alloy/6061 aluminum alloy/TA1 titanium alloy分类
航空航天引用本文复制引用
龚文韬,张泰华,屈维,何泽青,罗海波,李涛..浮空器管材结构连接方式比较及拉伸强度分析[J].海军航空大学学报,2024,39(1):139-146,8.基金项目
国家重点研发计划(2022YFB3901805) （2022YFB3901805）
海南省自然科学基金面上项目(523MS115) （523MS115）
