Diagnostics of stability of the cores constructions, elements of the carrier system of the ship and port
facilities, reduces to the definition of critical forces, excess which causes a transition of the system from one
equilibrium state to another. Such a transition often leads to the destruction of the constructions or other
forms of accidents, and therefore it is extremely undesirable and for practice it is important to knowledge of a
specific spectrum of critical forces and their corresponding forms of loss of stability.
