Vibration Response Analysis And Active Control Of The Vehicle-Bridge-Coupled System

With the rapid development of modern highway transportation, the new bridge is being used more and more in recent years. When the vehicle passes the bridge with the certain speed, it'll cause bridge vibration. At the same time, the vibration of bridge has an effect on the vibration of vehicle. The problem of vehicle-bridge coupled vibration emerged. Also, the road roughness will enhance effect of coupled vibration. The interaction will be more obvious with gradually light-weight of bridge structure and increase of vehicle speed. The vibration will not only affect riding comfort and running safety, but reduce service life of bridge. So,it's important theoretical and practical significance to analysis and study vehicle-bridge coupled vibration problem.This problem has attracted widespread attention because of concerning people's daily life. Many scholars have done a large number of researches and have obtained some achievements from spring-particle system to the interaction theory. However, spring-damper mechanical system appeared in vehicle model, leading to coupled system changed into differential equation group of the time-varying coefficient. Many numerical methods had used to solve the system in the past. Today, with the development of computer technology, we can make simulation model solve it. It'll have many advantages, such as intuition, rapidity, simplicity, etc.The respond must be suppressed, which is produced vehicle-bridge coupled vibration has a great of effects on bridge and vehicle. Now, it's obtained much engineering attention that active vibration control theory is applied to vehicle-bridge coupled system. This paper add control force in bridge to restrain vibration of vehicle and bridge, increase security and working life of bridge, strengthen riding comfort of vehicle.This paper, on the basis of the previous achievements, makes analysis model of vehicle and bridge coupled vibration and control in view of mode control method. By strong Simulink simulation, we set up platform which can reveal accurately and quickly all kinds of dynamic phenomena of the system and show control effeci. The method is intuitive, quick and efficient. The paper gave control conclusion to offer reference for design of vehicle and bridge structure.