Large-thickness separation structure without weakening groove, stress concentration or protective cover

The invention relates to a large-thickness separation structure without a weakening groove, stress concentration or a protective cover, and belongs to the technical field of spacecraft structures. The structure comprises eight annular energy-gathered cutting rope assemblies, four longitudinal energy-gathered cutting rope assemblies, two four-way detonation assemblies, six three-way detonation propagation assemblies and two detonators. Every four annular energy-gathered cutting rope assemblies are sequentially connected end to end to form an annular structure. The four annular energy-gathered cutting rope assemblies located on the lower annular structure are connected through the four three-way explosion propagation assemblies. The four annular energy-gathered cutting rope assemblies located on the upper annular structure are connected through the two four-way detonating assemblies and the two three-way detonating propagation assemblies. The four longitudinal energy-gathered cutting rope assemblies are axially