Development and analysis of a prototype car-carrier structure using the finite element method

摘要

This paper describes a computer-based modeling and simulation effort to aid in the development and design improvements of a prototype car-carrier structure. The most common approach for transporting vehicles over land in North America is the use of truck auto-carriers. The auto-carrier's structures and weld points often crack and break during service due to fatigue stresses. In addition, the large deflections on the top decks of the auto-carrier contribute considerable damage to the carrier structures and to the loaded vehicles. In this research, a finite element model of a prototype car-carrier structure was developed and numerical computations were conducted in LS-DYNA. The simulation results correlated well with responses observed from actual car-carriers. Stress distribution and deflections of the structures were investigated when the trailer negotiates speed bumps. Structural modifications were considered to minimize deflections and stress concentrations.