DYNAMIC INTERACTION OF BRIDGES AND TRUCKS WITH BRIDGE-FRIENDLY SUSPENSIONS

摘要

A truck with controlled semi-active suspensions traversing a bridge is examined for benefits to the bridge structure. Original concept of a road-friendly truck was extended to a bridgefriendly vehicle using the same optimization tools. A half-car model with two independently driven axles is coupled with bridges. Numerical integration solves coupled dynamic equations of motion with optimized truck suspensions. The control concept of extended ground-hook has been implemented on the controller. The basic idea is to combine a ground-hook fictitious damper force, skyhook fictitious damper force and traditional shock absorber force and reduce the road damage as well as keep ride comfort. Significant decrease of contact road-tyre forces is observed and the mid-span bridge deflections are on average smaller, when compared to commercial passive suspensions.