This paper deals with the dynamic analysis of a simply supported beam subjected to multiple discrete and distributed moving loads. Resonant vibration is observed for the support beam traversed by multiple discrete moving loads. A practical scheme is applied to reduce the excessive beam vibration to an acceptable range by using a damped absorber attached at the beam center. Lagrange's equation is used to formulated the system governing equation and Laplace transformation is applied to derive the dynamic responses for both the beam and the absorber, Various design parameters, such as the mass ratio, the tuning ratio, and the damping ratio, on the vibration reduction performance of the damped absorber are fully analyzed. By properly tuning the absorber with appropriate parameters, excessive beam vibration can be effectively suppressed with a single damped absorber.
Lin, Y.H. and Cho, C.H.
"Vibration Suppression of Beam Structures Traversed by Multiple Moving Loads Using a Damped Absorber,"
Journal of Marine Science and Technology: Vol. 1:
1, Article 7.
Available at: https://jmstt.ntou.edu.tw/journal/vol1/iss1/7