Off-line Hybrid Test Method for Vibration Performance Simulation of Coupled Maglev Train-Bridge

The core problem of maglev rail traffic is the coupled vibration of vehicle and bridge. In recent years, the technology of real-time hybrid test has been used in the laboratory to test the performance of train operation on bridge, but it has higher real-time requirements. Based on this, this paper adopted the off-line hybrid test method, which avoided the difficulty of high real-time synchronization between numerical and physical parts in real-time hybrid test. Combined with the fixed-point iteration, the off-line hybrid test method was developed to simulate the performance of the driving train on maglev bridge. Based on the shaking table inherent off-line iterative control, an outer loop off-line iterative controller was designed to form a double-layer off-line iterative control framework to improve the test reproduction accuracy of the maglev train-bridge coupled vibration. The off-line hybrid test on maglev train-bridge was carried out in the numerical environment. Results show that this method can solve the dynamic response convergence problem of coupled maglev train-bridge system after finite iterations. The feasibility can be verified for this method to reproduce the coupled vibration performance of maglev train-bridge.