火箭贮箱焊接缺陷修复技术研究现状

Research Status of Welding Defect Repair Technology for Rocket Fuel Tank

贮箱作为运载火箭的重要组成部件,其在服役时承受着振动、突风与冲击等随机载荷,保证箱体结构的可靠连接尤为重要。在实际生产中,焊接处的缺陷既破坏了接头的连续性,降低了其有效承载面积,又造成了局部的应力集中,从而直接降低火箭的可靠性。因此,针对焊接缺陷的修补是必要的。重点介绍了国内外几种常用的贮箱箱体焊接缺陷修补技术,从不同修补技术的特点入手,回顾了其发展应用过程,对其应用对象、修补后性能提升效果等进行分析。系统地总结了不同修补方法的现存问题,对未来贮箱焊接结构缺陷修补技术的发展方向进行了展望。

As an important component of the launch vehicle,the fuel tank is subjected to random loads such as vibrations,sudden winds and impacts while in service.Therefore,it is especially important to ensure a reliable connection of the tank structure.In production,defects at the welds not only destroy the continuity of the joint,reduce its effective bearing area,but also cause local stress concentration,thus directly reducing the reliability of the rocket.On this basis,repair for welding defects is necessary.This paper focuses on several commonly used joint defect repair techniques at home and abroad,starting from the characteristics of different repair techniques,reviewing their development and application process,and analyzing their application objects and performance enhancement effects after repair.The existing problems of different repair methods are systematically summarized,and an outlook on the future development direction of structural defect repair technology for rocket fuel tanks is presented.