Sizing or adapting elastic structure immersed into moving fluid, includes determining excitation modes of structure and number

摘要

The excitation modes of the structure and their number N are determined. For each mode, for at least one instant t, the different nodes LR are determined, and for each node the excitation force FR is determined. This gives the amplitude of vibration A over most of the structure's length Lt and allows the structure to be sized or adapted for the mechanical loads applied by the moving fluid.