A Case Study of Dynamic Response Analysis and Safety Assessment for a Suspended Monorail System

Abstract

A suspended monorail transit system is a category of urban rail transit, which is effective in alleviating traffic pressure and injury prevention. Meanwhile, with the advantages of low cost and short construction time, suspended monorail transit systems show vast potential for future development. However, the suspended monorail has not been systematically studied in China, and there is a lack of relevant knowledge and analytical methods. To ensure the health and reliability of a suspended monorail transit system, the driving safety of vehicles and structure dynamic behaviors when vehicles are running on the bridge should be analyzed and evaluated. Based on the method of vehicle-bridge coupling vibration theory, the finite element method (FEM) software ANSYS and multi-body dynamics software SIMPACK are adopted respectively to establish the finite element model for bridge and the multi-body vehicle. A co-simulation method is employed to investigate the vehicle-bridge coupling vibration for the transit system. The traffic operation factors, including train formation, track irregularity and tire stiffness, are incorporated into the models separately to analyze the bridge and vehicle responses. The results show that the coupling of dynamic effects of the suspended monorail system between vehicle and bridge are significant in the case studied, and it is strongly suggested to take necessary measures for vibration suppression. The simulation of track irregularity is a critical factor for its vibration safety, and the track irregularity of A-level road roughness negatively influences the system vibration safety.

ANFIS-PID Control of Active Suspension for the Full-Scale Straddle Monorail Model

“…According to the ISO8608 [16], the pavement power spectral density(PSD) can be expressed as follows:…”

Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

“…The ISO8608 pavement model is adopted for the rail unevenness model, with the following pavement power spectral density [17]:…”

Research on Vehicle-Bridge Vertical Coupling Dynamics of Monorail based on Multiple Road Excitations

“…Based on the theory of vehicle-bridge coupled vibration, Bao et al studied the influence of track irregularity on the operation of suspended monorail by using finite element method and dynamic method [16].…”