The behavior of non-closed nanostructures formed from the two-layer copper-nickel films during heating is studied. The investigation is carried out using molecular dynamics method. The interatomic interactions are described by potentials calculated using the embedded atom method. It is shown that simulated non-closed nanostructures convert thermal energy supplied to them under impulse heating into mechanical energy of oscillations. This is due to a significant difference in the coefficients of thermal expansion of the film layers and their temperature dependencies. It is shown that under detaching the films with different thickness from the substrate the collective atomic motions with vortex character are generated in these films.