运载火箭整流罩对接桁组件铆接变形有限元分析

Finite Element Analysis of Riveting Deformation of Docking Stringer Assembly of Launch Vehicle Fairing

对接桁组件是运载火箭整流罩中重要组成部分,涉及到整流罩的纵向分离,关系着火箭发射的成败。本文通过使用ANSYS/LS-DYNA软件,并结合工程铆接操作的经验数据,对对接桁双面埋头铆接变形过程进行了有限元分析,得出了对接桁组件铆接变形过程的变形机理,及锤击铆接与伺服压力铆接过程的变形规律。通过分析不同工况下的变形结果,得出对接桁组件铆接后变形量最小的工艺参数。

The docking stringer assembly is an important part of the launch vehicle fairing,which involves the separation of the fairing,which is related to the success or failure of the rocket launch.By using ANSYS/LS-DYNA software and combining with the actual riveting process,this paper carried out the finite element analysis of the double-sided countersunk riveting process of the docking stringer,obtained the deformation mechanism of the riveting deformation process of the docking stringer assembly and the deformation law of the process of the hammer riveting and servo rivet riveting.By analyzing the deformation results under different working conditions,it is obtained the process parameters with the minimal riveting deformation of the docking stringer assembly.