Abstract: Transporting girder vehicle is a heavy-duty transport equipment for bridge construction.
Its running system consists of dozens of tire components connected with the frame of transporting
girder vehicle by hydraulic load balancing suspension. In finite element analysis of the transporting
girder vehicle, it is a key problem to simulate the real force condition of the hydraulic load
balancing suspension. In order to solve this problem, a finite element model of transporting girder
which have multilayer balancing beams and proper boundary conditions is built. The model is a
static structure ensuring that the force situations are strict in accord with actual conditions although
it has multiple point of support. Based on the APDL language of ANSYS software, the finite
element model of transport girder vehicle is established, and the process of establishing the
multilayer balancing beams model is introduced in detail. The simulation results prove the
feasibility and validity of the method.

Key words: transporting girder vehicle, hydraulic load balancing suspension, APDL, finite element