Coupled Flexural-Longitudinal Vibration in a Curved Periodic Pipe Conveying Fluid

Abstract

A longitudinal vibration coupling with a flexural vibration in a curved fluid-filled periodic pipe is studied. The pipe is fabricated by a periodic composite material structure based on the Bragg scattering mechanism of Phononic Crystals. Using the transfer matrix method, the band structure of an infinite periodic straight pipe is calculated, and the elastic wave propagation characteristics of the periodic pipe are discussed. Furthermore, the vibrational frequency response functions of a finite curved pipe are performed and the coupled vibration is studied. Finally, the transmission properties of longitudinal vibration, flexural vibration and their coupling vibration in the curved periodic fluid-filled pipe are investigated.

Study on vibration characteristics of periodic truss structure of offshore platform

“…Shen et al designed the conduit into a periodic structure and used the transfer matrix (TM) method to study the characteristics of steady-state waves in the system and the dynamic response of the periodic shell system. 27,28 It is found that the periodic conduit has better vibration damping performance than the aperiodic conduit. Yu et al 29 founded the existence of the Bragg and locally resonant band gaps, corresponding to the velocity field, can exist in a periodic pipe system through experiments and analyzed the influence of relevant factors on the band gaps .…”