Vibrational power flow from machines into built-up structures, part II: Wave propagation and power flow in beam-stiffened plates

Abstract Wave propagation and power flow due to force and torque (moment) excitation has been studied at the driving point and in the far field of an infinite plate with a single line-stiffener. Such a structure excited by forces or torques applied to the beam behaves like an uncoupled beam at the driving point. In the far field, power transmitted by flexural waves in the beam is radiated into the plate whilst power transmitted by torsional waves in the beam is not radiated. The plate carries a cylindrical wave with a strong directivity.