Fatigue Life Analysis in Machined Course of Primary Mirror Group of Space Camera

Abstract

In the course of primary mirror face of space camera being machined,milling action runs repeatly between millstones and primary mirror,which brings about the alternately changed load in the soft support structure of primary mirror.The alternately changed load can lead to fatigue destruction of the structure.Fatigue life is analyzed by S-N method in this paper,the analyzed results show that the fatigue life of the soft support structure meets the demand.The simulated analysis of fatigue life can forebode effectively the fatigue intensity in the course of the structure being machined and used,reduce experiment times and cost,and provide theory foundation for reliability design of space camera structure.