Prediction and Analysis of the Assembly Preload With Multiple Constrains for Space Solar Arrays in Different Tightening Sequences
The preload control oftheassembly with multiple constrains is important to the long-term storage,launch and in-orbit unfolding ofthe space flexible solar arrays.However,the preloads are affected by the deformation of the solar array storage box and the tightening sequences of the fasteners,causing difficulties to the qualified rate of the final preloads.Therefore,considering the deformation compatibility conditions and the coupling effects,an analytical model based on the elastic interaction stiffness is established to predict the preloads and design the clamping process.Moreover,the preload variation patterns and the interaction mechanism in different tightening sequences are investigated.The results indicate that the residual preloads depend on the pre-tightening sequences and the direction of the preloads is related to the region of the deflection surface where the constrains are located.Finally,the initial preloads varying from different loading sequences may be calculated by using the analytical model to design the preloading process.
flexible solar arraymultiple constrainstightening sequenceelastic interactionpreload
NETL
NSTL
万方数据
