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The application of origami in engineering has offered innovative solutions for deployable structures in space exploration, civil engineering, robotics, and medical devices due to its ability to enable compact folding and expansive deployment. Despite its great potential, prior studies have predominantly focused on static or kinematic aspects, leaving the dynamic deployment behaviors underexplored. This research addresses this gap by investigating the dynamics of origami structures under deployment, with a focus on origami tubular structures actuated by fluidic pressure induced by air or liquids. We introduce a dynamic model that incorporates panel inertia and flexibility, critical for capturing the complex behaviors of origami deployment that rigid kinematic models overlook, as well as the fluidic pressure effect on the structural properties and dynamics. Our findings, derived from non-dimensionalized models, reveal the profound influences of the structural and input parameters on the dynamic deployment response, marking a significant advancement in origami research. Our study on fluidic origami tubes, where internal pressure is varied, uncovers how pressure levels and the pressurization rate affect the transient dynamics and final configuration of the system. The introduction of a space-invariant fluidic pressure, applied as either a step or ramp function, demonstrates the system's sensitivity to pressure adjustments, affecting its stiffness, damping ratio, and transient response. This feature leads to a rich multistability landscape, offering diverse deployment dynamics and the ability to achieve various stable configurations through controlled …