The theory of a continuous damped vibration absorber to reduce broad-band wave propagation in beams
Year: 2007
Type: book
Abstract: In order to attenuate structural waves in beams, a damped mass-spring absorber system is considered that is attached continuously along the beam length. Compared with other measures, such as impedance changes or tuned neutralisers applied at a single point, it is effective for excitation at any location along the beam. Although it is a tuned system, it can also be designed to be effective over a broad frequency range by the use of a high damping loss factor and multiple tuning frequencies. It has the advantage over constrained layer damping treatments that it can be effective even when the structural wavelength is long. The parameters controlling its behaviour are investigated and simple formulae developed, allowing optimisation of its performance. A particular application is the reduction of noise from a railway track, which requires the attenuation of structural waves along the rail to be increased typically in the frequency range 500 to 2000 Hz
Author: David Thompson
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2108678749