To meet the design requirements of a morphing bump surface

a research was conducted on the bi-stable mechanical behavior of a hinged shallow thin spherical shell with elliptical bottom surface.The conversion mechanism and required condition of the shell's two stable configurations were analyzed by simulation method.Also the snap-through type

which occurred in the transition process of stable configurations

and its influential factors

were analyzed.Finally the effects of the loading position and shape parameters on the critical driving force and structural strain were given under different driving modes.The results show that the bi-stability condition of the hinged structure requires a certain ratio of shell height to shell thickness;there exist combinations of local and overall snap-through phenomena during the transition process of the structural stable configurations

which could be controlled by the loading position and structural parameters;in case of structure snap

the critical load and structural strain are related to the load methods and structural parameters.