Sylwester Tudruj, ZA, MEiL, PW, Effective simulation of fluid structure interaction limited to thin deformable shells

Shells are present in our everyday life and in technical solutions in different forms.

The simplest example of shells are clothes of complex shapes. In technique, sails, parachutes and airbags are examples of shells. The shape of shells depends on static or dynamic actions of the surrounding air or gas. After unfolding, a folded parachute is shaped by aerodynamic forces acting on its surface. The sail shape also derives from the action of aerodynamic forces. The shape and behaviour in time of the airbags shell depends on forces from the gas expanding expanding inside  and the surrounding air. This study is concentrated on modelling the shells motion for which their behaviour in time is the major concern. The study presents a dynamics of a shell modelled as a lumped parameters system, driven by aerodynamic forces and integrated by diffrent numerical schemes. A new integration method was proposed and compared with known schemes. A method of shell discretization, defining its local mechanical properties, generation of equations of motion and methods of its integration in time are shown in this work.