A Novel Solution to Find the Dynamic Response of an Euler–Bernoulli Beam Fitted with Intraspan TMDs under Poisson Type Loading

Infrastructures

Giuseppe Failla¹  Antonina Pirrotta²  AlbertoDi Matteo²  Iain Peter Dunn² 

[1] Dipartimento di Ingegneria Civile, dell’Energia, dell’Ambiente e dei Materiali, Università degli Studi Mediterranea di Reggio Calabria, 89124 Reggio Calabria RC, Italy;Dipartimento di Ingegneria, Università degli Studi di Palermo, 90128 Palermo, Italy;

关键词: Euler Bernoulli Beam;    Poissonian Loading;    Tuned Mass Damper;   

DOI  :  10.3390/infrastructures5050040

来源: DOAJ

【 摘 要 】

This contribution considers a virtual experiment on the vibrational response of rail and road bridges equipped with smart devices in the form of damping elements to mitigate vibrations. The internal damping of the bridge is considered a discontinuity that contain a dashpot. Exact complex eigenvalues and eigenfunctions are derived from a characteristic equation built as the determinant of a 4 x 4 matrix; this is accomplished through the use of the theory of generalized functions to find the response variables at the positions of the damping elements. To relate this to real world applications, the response of a bridge under Poisson type white noise is evaluated; this is similar to traffic loading that would be seen in a bridge’s service life. The contribution also discusses the importance of smart damping and dampers to sustainability efforts through the reduction of required materials, and it discusses the role played by robust mathematical modelling in the design phase.

【 授权许可】

Unknown