Vehicle axle load identification on bridge deck with irregular road surface profile [J
- S.Q.Wu, S.S.Law
- Engineering Structures,
In view of real-time monitoring dynamic vehicle loading, a nonlinear quarter-vehicle vibration model with two degrees of freedom and four parameters was established. The dynamic performance of suspension under different operating conditions was simulated. The general linear relation of dynamic suspension load and displacement was obtained through phase plane method. According to simulation results, a method for analyzing dynamic vehicle loading based on multi-sensors was put forward. A system of monitoring dynamic vehicle load status was designed and developed, which was installed on a FAW CA1169PK2L2EA80 heavy-duty truck and calibrated. Road tests were fulfilled under A-level road, 30 km/h and pre-set change of position of goods. The results of road tests showed that this method could real-time monitor the change of vehicle loading, which provided a new method of early-warning abnormal vehicle loading status.