A new method for generalizing non-self-intersecting flexible polyhedra

A surface is considered flexible if it allows a continuous deformation that preserves both metric and smoothness. We introduce a novel construction method, called "base + crinkle," for generating a broad class of non-self-intersecting flexible closed polyhedral surfaces. These surfaces may be non-triangulated, exhibit multiple kinematic degrees of freedom, and possess topologies beyond the sphere. We further discuss the broader applicability and potential generalizations of the method, offering complementary insights into the geometry of origami and the design of engineering mechanisms.