Vibration Behavior Analysis for Simply Supported Beam under Multiple Moving Vibrating Systems

Abstract

In this paper, the transverse vibration mode of simply supported beam subjected to moving mass and moving spring-mass system has been studied considering the gravity of the beam and the inertia of the moving mass. A coupled vibration model for multiple moving spring-mass systems (MSMSs) moving on the simply supported beam is established. The numerical simulations of lateral transient response of simply supported beams subjected to four different moving systems are carried out. It is found that the vibration frequency of the midpoint of the beam will be changed once the moving mass system (MMS) is changed into the MSMS. This phenomenon is more pronounced under the action of a single moving system. In addition, be different from the single MMS, the results show that the lateral displacement curves of the positions near the supports will occur obvious bimodal characteristics when a single MSMS pass through the simply supported beam.